Prof.
Walter Kutschera
(Vienna Environmental Research Accelerator (VERA), Faculty of Physics – Isotope Research, University of Vienna, Austria)
19/04/2010, 03:00
The advancement of Accelerator Mass Spectrometry (AMS) some 30 years ago opened the possibility to detect long-lived radionuclides (both natural and man-made) through isotopic abundance measurements down to a level of ~10-16. It thus became possible to explore our world atom by atom in almost every section of the environment at large. Worldwide there are about 80 facilities in...
Dr
J.-P. Glatz
(European Commission, JRC, Institute for Transuranium Elements, P.O. Box 2340, 76125 Karlsruhe, Germany)
19/04/2010, 03:30
Chemistry of Nuclear Fuel Cycle, Radiochemical Problems in Nuclear Waste Management
Verbal
To comply with the sustainability goals defined for innovative reactor systems, a waste minimization through recycling of all actinides is required and can be realised using a so-called Partitioning and Transmutation (P&T) concept inherent to the reactor systems. It is obvious that the corresponding fuel cycles will play a central role because an efficient and selective recovery of the key...
Dr
Frans De Corte
((em.) Ghent University and Research Foundation-Flanders)
19/04/2010, 04:00
Recently plans were devised [IAEA CRP 2005-2009: “Reference Database for Neutron Activation Analysis”] for creating and publishing a library of k0-factors that are generated differently from the experimentally determined ones published and used in practice thus far [ADNDT, 85 (2003) 47]. For two reasons, we look at this anxiously. Firstly, when realizing that these “new” k0-factors will be...
Dr
Ondřej Lebeda
(Nuclear Physics Institute, Academy of Sciences of the Czech Republic)
19/04/2010, 05:00
Verbal
Prof.
Jens Volker Kratz
(University of Mainz)
19/04/2010, 05:30
Advanced methods that have been developed and applied to study the chemical properties of the transactinide elements in comparison with their lighter homologs are presented.These include thermochromatography, and isothermal chromatography in the gas phase as well as ion-exchange and reversed-phase liquid chromatography in the aqueous phase, liquid-liquid extraction, and electrodeposition....
Dr
Franz Schoenhofer
(BMLFUW - retired)
19/04/2010, 06:00
Drinking water is the most important food, therefore special care has to be taken for its purity. The European Union has issued a Directive on the Quality of Drinking Water, which also contains a chapter on radionuclides. The details will be discussed.
With rare exceptions only Naturally Ocurring Radioactive Material (NORM) is of importance for the dose from drinking water. NORM usually...
Jiří Mizera
(Nuclear Physics Institute, Academy of Sciences of the Czech Republic)
19/04/2010, 08:00
The study presents results of geochemical characterization of a large collection of tektites and other impact glasses. Impact glasses are produced through large meteoritic impacts by melting of surface materials. Tektites are impact glasses ejected from the impact site to distant strewn fields. The collection included namely moldavites from the major parts of the Central European tektite...
Prof.
Andreas Türler
(Paul Scherrer Institute and Bern University, CH-5232 VILLIGEN PSI, SWITZERLAND)
19/04/2010, 08:00
Chemistry of Actinide and Trans-actinide Elements
Verbal
The nuclear fusion reactions 244-Pu(48-Ca,3n)289-114 and 244-Pu(48-Ca, 4n)288-114 were studied at the new, highly efficient gas-filled recoil separator TASCA. The large number of thirteen observed decay chains assigned to 288-114 and 289-114 enabled reliable cross sections measurements. The highest cross section was 8.2 (+4.0 / -2.8) pb measured for the 4n evaporation channel. The new...
Dr
Alexander Yakushev
(Institute for Radiochemistry TU Munich)
19/04/2010, 08:15
Chemistry of Actinide and Trans-actinide Elements
Verbal
The newly built gas-filled separator TASCA, at the GSI Darmstadt has been successfully commissioned. TASCA was designed to study the physics and chemistry of the heaviest element and it has been demonstrated that TASCA is the most efficient device for the production of superheavy elements in complete fusion reactions with a 48Ca ion beam. Two experiments on the physics and chemistry of element...
Dr
Jan Kučera
(Nuclear Physics Institute ASCR, Řež, Czech Republic)
19/04/2010, 08:20
Silicon is an essential element for organisms. Although the biochemical mechanisms remain obscure, dietary Si is considered important for growth and development of bone and connective tissues. Recently, it has been suggested that Si and silicic acid may decrease the bioavailability of aluminium by blocking its uptake through the gastrointestinal tract and by impeding reabsorption in kidney...
Dr
Jan Dvorak
(Helmholtz Institute Mainz)
19/04/2010, 08:30
Chemistry of Actinide and Trans-actinide Elements
Verbal
Production of numerous superheavy elements (SHE) in 48Ca irradiations of actinide targets was reported by the Dubna Gas Filled Recoil Separator (DGFRS) group in past years [1]. Independent verification of these observations has been of paramount importance, but confirmation experiments failed to produce SHE in 48Ca induced reactions. We report on the first successful...
Dr
Zsolt Révay
(Institute of Isotopes)
19/04/2010, 08:40
Institute of Isotopes has been a major center in further development of Prompt Gamma Activation Analysis (PGAA). The paper describes the analytical procedure followed at Budapest. The analysis is based on the careful calibration of the detector system. The counting efficiency and non-linearity of the Compton-suppressed high-purity germanium detector is determined regularly, and enables the...
Mr
Alexey Serov
(PhD Student)
19/04/2010, 08:45
Chemistry of Actinide and Trans-actinide Elements
Verbal
Based on the order in periodic table, element 114 should be placed in the group 14, which includes such elements like C, Si, Ge, and Pb. It can be expected by the law of periodicity that E114 will reveal a more metallic behaviour than its lighter homologues. However, relativistic quantum chemical calculations predict different chemical behaviour, namely, higher inertness in comparison with...
Dr
László Szentmiklósi
(Institute of Isotopes, Hungarian Academy of Sciences)
19/04/2010, 09:00
The Prompt-Gamma Activation Analysis (PGAA) and the Neutron Induced Prompt-gamma Spectroscopy (NIPS) facilities are located at the end of the guided beamline No.1. of the Budapest Research Reactor. In the last few years they were significantly upgraded. The partial replacement and realignment of the neutron guide elements resulted in a factor of four gain of the neutron flux. To make possible...
Prof.
Ivo Zvara
(Flerov Laboratory of Nuclear Reactions, Joint Institute of Nuclear Research,)
19/04/2010, 09:00
Chemistry of Actinide and Trans-actinide Elements
Verbal
Vacuum Thermochromatography – Theory and Monte Carlo Simulation
Mixtures of ultra low amounts of species can be separated in a tube, evacuated well below a microbar, along which the temperature gradually decreases from the closed hot end, by placing the sample into this hot end (zero coordinate). Then the Knudsen flow results in that the components with dissimilar adsorbability on the...
Mr
David Wittwer
(University of Bern / Paul Scherrer Institut)
19/04/2010, 09:15
Chemistry of Actinide and Trans-actinide Elements
Verbal
The use of the Dubna Gas-Filled Recoil Separator (DGFRS) [1] as a preseparation device for gas phase chemistry experiments with elements 112 and 114 led us to the task of reevaluating the stopping force (STF) of superheavy elements (SHE). In the experiment the DGFRS and the IVO-system [2] were separated by a thin Mylar window of variable thickness so that the evaporation residues (EVR) can...
Mr
Martin Precek
(Oregon State University)
19/04/2010, 10:00
Chemistry of Nuclear Fuel Cycle, Radiochemical Problems in Nuclear Waste Management
Verbal
Extraction of hexavalent and tetravalent actinides with tributylphospate (TBP) from their solutions in nitric acid is the most industrially mature process for reprocessing of spent nuclear fuel and is the basis for the development of advanced reprocessing schemes like UREX and TRUEX. One of the less resolved issues is the management of neptunium in the extraction system, because of not clearly...
Dr
Nicholas Evans
(Loughborough University)
19/04/2010, 10:15
Chemistry of Nuclear Fuel Cycle, Radiochemical Problems in Nuclear Waste Management
Verbal
The preferred option in the UK for the management of higher-activity radioactive wastes is to store it in a deep Geological Disposal Facility (GDF). This may then be backfilled with a cementitious material. Once closed, the GDF will become saturated with groundwater and highly alkaline porewater will develop with an initial pH of ca. 13.4. This will decrease to 12.5 as groundwater flow removes...
Dr
Mária LUČANÍKOVÁ
(Nuclear Research Institute plc Řež)
19/04/2010, 10:30
Chemistry of Nuclear Fuel Cycle, Radiochemical Problems in Nuclear Waste Management
Verbal
The partitioning and transmutation of long-lived nuclides such as minor actinides from high liquid waste (HLW) issued from nuclear fuel reprocessing is a method how to reduce the long-term environmental burder of HLW. In recent years, several HLW partitioning processes using different extractant agents have been developed. Among them, the tridentate ligands like N,N,N′,N′-tetraoctyl...
Dr
Mikhail Alyapyshev
(Khlopin Radium Institute RPA)
19/04/2010, 10:45
Chemistry of Nuclear Fuel Cycle, Radiochemical Problems in Nuclear Waste Management
Verbal
One of the main advantages of extraction with supercritical fluids (SCF) or liquid gases (LG) is a possibility of the reagent-free regeneration of "solvent", which sharply decreases the secondary waste volume. As a result, in last 20 years the researcher in many countries focus their attention on the supercritical fluid extraction (SFE) of the trace amounts of radioactive and heavy metals for...
Dr
Pavel Soucek
(European Commission, Joint Research Centre, Institute for Transuranium Elements (ITU))
19/04/2010, 11:00
Chemistry of Nuclear Fuel Cycle, Radiochemical Problems in Nuclear Waste Management
Verbal
An electrorefining process in molten chloride salts using solid aluminium cathodes is being developed in the Institute for Transuranium Elements to recover all actinides from metallic spent nuclear fuel. In this process, actinides are group-selectively electrodeposited on the cathode in a form of solid actinide-aluminium alloys. Fission products are anodically co-oxidised from the fuel...
Dr
Nicholas Evans
(Loughborough University)
19/04/2010, 11:15
Chemistry of Nuclear Fuel Cycle, Radiochemical Problems in Nuclear Waste Management
Verbal
The UK has an underground repository concept with a combination of engineered and natural barriers. Cementitious materials will produce high pH conditions for at least 1 Ma and surfaces for sorption which will greatly reduce the solubility of many radionuclides. Likely to be in the repository are many organic ligands, as inherent components of wastes or due to the degradation of organics, e.g....
Mrs
Wendy Pemberton
(University of Nevada, Las Vegas)
19/04/2010, 11:45
Chemistry of Actinide and Trans-actinide Elements
Poster
Room temperature ionic liquids (RTILs) were known as early as the 19th century beginning with alkylammonium nitrates. The field grew in the 1970s by using combinations of air and water sensitive aluminum halides with an organic cation salt. While these ionic liquids were useful and had many desirable features, they were extremely sensitive to air and water, limiting their utility. RTILs today...
Dr
Oxana Nipruk
(Nizhny Novgorod State University named after N.I. Lobachevsky)
19/04/2010, 11:45
Chemistry of Actinide and Trans-actinide Elements
Poster
Uranoarsenates and uranophosphates belong to a numerous difficult soluble compounds that can be formed by the ingress of various uranium-containing waste in the environment and can also be used as uranium-fixing matrices in technological processes. Research of the state of these compounds in aqueous solutions, of their hydrolytic stability and solubility, and of transformations of...
Dr
Yoon Yeol Yoon
(Korea Institute of Geoscience and Mineral Resources)
19/04/2010, 11:45
Radionuclides in the Environment, Radioecology
Poster
The use of radioactive isotopes as a groundwater-dating tool plays an important role in assessing the dynamics of groundwater systems, essential for the characterization of water resources and planning its exploitation. In hydrogeological studies the application of radioisotopes with a short half-life (below 100 year) is limited in dating old groundwater. However, they can be extremely helpful...
Prof.
Viacheslav Radchenko
(JSC "State Scientific Center - Research Institute of Atomic Reactors")
19/04/2010, 11:45
Chemistry of Actinide and Trans-actinide Elements
Poster
Over many years JSC “SSC RIAR” has been performing activities on the production and investigation of metals of transplutonium elements (TPE), their alloys and compounds.
This paper presents the results of production and X-ray examination of micro-samples of americium-241 compounds with gold and copper, i.e. identification of crystal structures of the compounds obtained and calculation of...
Mr
Nikolay Aksenov
(Flerov Laboratory of Nuclear Reactions, Joint Institute for Nuclear Research)
19/04/2010, 11:45
Chemistry of Actinide and Trans-actinide Elements
Poster
Chemical identification of radionuclides in the decay chains of the recently discovered transactinide elements may serve as a method for confirming the discovery [1]. The longer half-lives of radionuclides of transactinides discovered in the An + 48Ca reactions expands the application of radiochemical techniques for their chemical characterization [2]. The method of cocrystallization can give...
Róbert Janovics
(Institute of Nuclear Research of the HAS, Debrecen, Hungary)
19/04/2010, 11:45
Radionuclides in the Environment, Radioecology
Poster
The new Hungarian National Radioactive Waste Disposal Facility was established in the granite of the Mórágy Block Mountains to store low and intermediate level radioactive waste (L/ILW) originating from the Paks Nuclear Power Plant. The safe operation of the radioactive waste disposal facilities requires a long-term environmental monitoring to gain information about the radiation properties of...
Mr
Guogang Jia
(National Institute of environmental protection and reasearch)
19/04/2010, 11:45
Radionuclides in the Environment, Radioecology
Poster
Some important naturally occuring a and b radionuclides in seventeen brands of drinking water samples collected in Italy were determined. The mean activity concentrations (mBq L-1) of the radionuclides in the water samples were almost in the order: 26±36 (234U) > 21±30 (238U) > 8.9±15 (226Ra) > 4.8±6.3 (228Ra) > 4.0±4.1 (210Pb) > 3.2±3.7 (210Po) > 2.7±1.2 (212Pb) > 1.4±1.8 (224Ra) > 1.1±1.3...
Dr
Galina Lujaniene
(Institute of Physics, Savanorių ave 231, Vilnius, LT-02300, Lithuania)
19/04/2010, 11:45
Radionuclides in the Environment, Radioecology
Poster
Natural clay and iron minerals of complex composition are reactive mineral phases which can affect retardation and transport of radionuclides in the environment. Therefore, it is important to understand and quantify sorption of radionuclides on them. Sorption of Cs, Pu(IV), Pu(V) and Am(III) at trace concentrations on three well characterized samples of Triassic clay as a function of pH and...
Dr
I. Lopes
(Nuclear and Technological Institute/ Radiological Protection and Safety Unit)
19/04/2010, 11:45
Radionuclides in the Environment, Radioecology
Poster
The Nuclear and Technological Institute (ITN) has the legal responsibility to carry out the environmental radiological monitoring at a national level. This survey was planned to provide relevant information on radioactivity levels in different components of the ecosystem (atmosphere, aquatic and terrestrial environments). In what concerns the terrestrial environment the evaluation of the...
Prof.
HELEN PAPAEFTHYMIOU
(DIVISION OF INORGANIC, PHYSICAL AND NUCLEAR CHEMISTRY, DEPARTMENT OF CHEMISTRY, UNIVERSITY OF PATRAS, GREECE)
19/04/2010, 11:45
Radionuclides in the Environment, Radioecology
Poster
Five small sediment cores were collected from the seafloor of the Amvrakikos Gulf for the study of the spatial and downcore distribution of natural radionuclides and 137Cs in the sediments. Amvrakikos Gulf is a shallow (< 65m) marine embayment lying on the west coast of Greece having a surface of some 405 km2 and a coastline length of 256 km. It is separated from the open Ionian Sea by a beach...
Dr
Ashraf Khater
(King Saud University)
19/04/2010, 11:45
Radionuclides in the Environment, Radioecology
Poster
The Red Sea is a deep semi-enclosed and narrow basin that has an intensive non-industrial activities on and near its shore. Oil exploration, phosphate mining and trading, navigation activities and intensive touristic activities are considered as non-nuclear pollution sources. They could impose a serious radiological and ecological impacts on the Red Sea marine environment. Both oil and...
Ms
Aylin Ölcer
(Institute of Nuclear Chemistry, Johannes-Gutenberg-Universität Mainz)
19/04/2010, 11:45
Chemistry of Actinide and Trans-actinide Elements
Poster
Room-temperature ionic liquids (RTILs) consist of organic cations and organic or inorganic anions. Beside their fluidity over a large temperature range, they have versatile physical and chemical properties, e.g. low vapour pressure, thermical and chemical stability [1]. In our investigation, the wide electrochemical window of RTILs is of particular importance. RTILs are considered as “green...
Mr
Alexander Osipenko
(Research Institute of Atomic Reactors)
19/04/2010, 11:45
Chemistry of Actinide and Trans-actinide Elements
Poster
Curium isotopes contained in spent nuclear fuel have a high specific heat rate and long half-life, and they should be recovered from high-level wastes (HLW) and transmutated. Molten chlorides have more high radiation resistance than aqueous and organic media. This fact is of significant importance because curium has a high specific activity. There is not much information about the behaviour of...
Dr
Eva Szeles
(Institute of Isotopes of the Hungarian Academy of Sciencies)
19/04/2010, 11:45
Radionuclides in the Environment, Radioecology
Poster
A comprehensive environmental monitoring and analysis is very important before the decommissioning of a nuclear facility to assure the database for reveal undeclared clandestine nuclear activities.
Experiences in the process and sampling concerning decommissioning are not yet available in Hungary because the facilities have not still accomplished the end of their lifecycle.
Decommissioning...
Prof.
Viacheslav Radchenko
(JSC "State Scientific Center - Research Institute of Atomic Reactors")
19/04/2010, 11:45
Chemistry of Actinide and Trans-actinide Elements
Poster
Presented are the results of production and x-ray examination of ruthenium compounds with curium and technetium.
A curium -244 alloy microsample was produced by the high-temperature condensation of curium vapor onto the ruthenium substrate and then analyzed by the x-ray diffractometric method. Two intermetallides were detected in the sample: Ru2Cm with a hexagonal lattice of the Zn2Mg type...
Zoltán Hölgye
(National Radiation Protection Institute)
19/04/2010, 11:45
Radionuclides in the Environment, Radioecology
Poster
In this work we present data on transuranium isotopes in effluents (quarterly, since 2006 half-yearly determined activity concentrations of 238Pu, 239,240Pu, 241Am, 242Cm and 244Cm in discharged effluents, annual discharged activities of individual radionuclides) discharged to air from 7 stacks in 2004-2009. In the effluents discharged to air from one stack low-level activities of transuranium...
Nils Baumann
(FZD)
19/04/2010, 11:45
Radionuclides in the Environment, Radioecology
Poster
Nils Baumann*, Thuro Arnold
Forschungszentrum Dresden-Rossendorf e. V., Institute of Radiochemistry, P.O. Box 510119, D-01314 Dresden, Germany
*Tel.: +49 (351) 260 2076, Fax: +49 (351) 260 3553, Email: n.baumann@fzd.de
The test field “Gessenwiese” was installed on a leaching heap at the former uranium mining area Ronneburg (western Thuringia) for investigations in acid mining drainage and...
Ms
Isabell Dreissig
(Forschungszentrum Dresden-Rossendorf)
19/04/2010, 11:45
Chemistry of Actinide and Trans-actinide Elements
Poster
This work presents results about the formation of thorium(IV) colloids and precipitates in the presence of silicic acid. Three methods were used for the preparation of the thorium compounds:
- Experiment A: Silicic acid concentrations and ionic strengths were adjusted in the presence of preformed stable ThO2 colloids at neutral pH (0.4 mM Th; 0 3 mM Si; I = 0.05 M NaClO4)
- Experiment B:...
Dr
Vladimir Chistyakov
(Russia, Rosatom, JSC"State Scientific Center-Research Institute of Atomic Reactors", Radiochemical Unit)
19/04/2010, 11:45
Chemistry of Actinide and Trans-actinide Elements
Poster
Behavior of Np(V) in strong nitric acid solutions with different strength (1,0 ÷ 3,0) mol∙l-1 and KPW (1 ÷ 5)∙10-3 mol∙l-1, containing potassium phosphotungstate, K10P2W17O61 (KPW) is examined by spectrophotometric method .
It is established that Np (V) final conversion products under studied experimental conditions are Np (IV) and Np (VI), and the process is going in accordance with a...
Dr
Sergey Gordeev
(Scientific and production enterprise "Radon")
19/04/2010, 11:45
Radionuclides in the Environment, Radioecology
Poster
Moscow is the historical center of the atom project of the former USSR.
Radioecological assesment of the territory of Moscow has been provided in compliance with the conception and program of comprehensive radioecological monitoring of the Moscow city, approved by the Moscow Goverment.
The methodology of the envitonmental monitoring is based on long-term determenation of concentration of the...
Mrs
Aliya Nurmukhanbetova
(Institute of Nuclear Physics)
19/04/2010, 11:45
Radionuclides in the Environment, Radioecology
Poster
Ecological situation of Mangystau oblast (Kazakhstan) started aggravating in 1990s with exploration of uranium ore, oils, mineral raw and creation chemical industry in Mangyshlak without paying due attention to environmental issue. According to available data the worsening is connected to number of ecologically unfavorable problems.
The tailing pond KOSHKAR-ATA, representing the drain-free...
Dr
RŪTA DRUTEIKIENE
(INSTITUTE OF PHYSICS)
19/04/2010, 11:45
Radionuclides in the Environment, Radioecology
Poster
The potential of migration of Pu at contaminated sites and also from the waste repository depends on the Pu environmental behavior determined by its chemical speciations. Depending on the ambient conditions plutonium exists in several oxidation states due to the low differences in the oxidation – reduction potentials between the oxidation states 1. The geochemical and physical...
Mr
Foued Gharbi
(UR-MTDN, National Center of Nuclear Sciences and Technolgies)
19/04/2010, 11:45
Radionuclides in the Environment, Radioecology
Poster
The radioactivity concentrations of 226Ra, 232Th and 40K in different phosphate
fertilizers, triple superphosphate (TSP), diammonium phosphate (DAP),
monoammonium phosphate (MAP) and in phosphoric acids produced and used in the agricultural soils in Tunisia were measured. Other exported and used phosphate fertilizers in the country were also subject of radioactivity concentrations...
Dr
Dagmara Strumińska-Parulska
(University of Gdańsk)
19/04/2010, 11:45
Radionuclides in the Environment, Radioecology
Poster
More than 100 samples of human hair and 15 samples of dog fur were collected from Pomeranian area for polonium analysis. The 210Po concentration in analyzed hair samples ranged from 0.33±0.02 to 12.84±0.80 mBq.g-1 dw (mean value is 3.41 mBq.g-1).
The highest 210Po activity values were found in hair sample collected from men had rich fish diet and...
Mr
Harold Brice Tanh Jeazet
(FZD Dresden Rossendorf (Institute of Radiochemistry))
19/04/2010, 11:45
Chemistry of Actinide and Trans-actinide Elements
Poster
The coordination chemistry of uranium in different oxidation states has recently generated much attention due to several reasons. The most important reason is the separation of U(VI) present in radioactive waste, but also the effects of U(VI) on our environment are of great interest.[1] The extraction and separation of U(VI) and other actinides, especially the separation from lanthanides, is...
Dr
Andrej Osterc
(Institute Jožef Stefan)
19/04/2010, 11:45
Radionuclides in the Environment, Radioecology
Poster
I-129 is considered as a global pollutant and its role as a global tracer to follow the dissemination of radionuclides from a source point such as nuclear fuel reprocessing plants increases. The natural I-129/I-127 isotopic ratio in the order of 10E-12 was significantly influenced by releases of anthropogenic I-129 to the environment. The ratio of I-129/I-127 in the marine environment has...
Mr
Milan Bunata
(National Radiation Protection Institute)
19/04/2010, 11:45
Radionuclides in the Environment, Radioecology
Poster
Plutonium 241 is the only beta emitting plutonium isotope formed by a nuclear reactor operation. In contrast to the other ones, its half life is relatively short (about 14 years). Emitting beta radiation, it decays to another important radionuclide, Am-241. Hence the activity of americium 241 is still increasing in the area of Chernobyl, Ukraine.
Nuclear fission leads to higher-order...
Dr
Dagmara Strumińska-Parulska
(University of Gdańsk)
19/04/2010, 11:45
Radionuclides in the Environment, Radioecology
Poster
Wet and dry atmospheric fallout from nuclear weapon tests is one of the most important sources of plutonium in Baltic Sea. The other sources: plutonium releases from spent fuel facilities in Sellafield (UK) and Cap de la Hague (France) are less important. Since April 26, 1986 there is a new source of plutonium – Chernobyl plutonium, which should be taken under note in estimation of its...
Dr
Dagmara Strumińska-Parulska
(University of Gdańsk)
19/04/2010, 11:45
Radionuclides in the Environment, Radioecology
Poster
Phosphogypsum refers to the gypsum formed as a by-product of processing phosphate ore into fertilizer with sulfuric acid. They are radioactive due to the presence of naturally occurring uranium and radium in the phosphate ore and enriched in natural polonium 210Po, while the uranium radionuclides (234U and 238U) tend to be in waters around waste dump. The...
Prof.
Viacheslav Radchenko
(JSC "State Scientific Center - Research Institute of Atomic Reactors")
19/04/2010, 11:45
Chemistry of Actinide and Trans-actinide Elements
Poster
Under limited availability of transplutonium metals special techniques and methods of their production have been developed that combine the process of metal reduction from a chemical compound and preparation of a sample for examination. In this situation the evaporation and condensation of metal onto substrate becomes the only possible technology.
Thin film samples of metal curium (244Cm,...
Mr
Dmitry Manzon
(Institute of global climat and ecology)
19/04/2010, 11:45
Radionuclides in the Environment, Radioecology
Poster
The aim of this work is generalizing experimental researches data received in zone of Chernobyl trace in 2007 in Bryansk region in order to automorph, transit and accumulation landscapes. Variabiliy of 137Cs levels in shown at the 3 experimental sites.
Mr
Bojan Štrbac
(Radiation Protection Centre)
19/04/2010, 11:45
Radionuclides in the Environment, Radioecology
Poster
Surface soil samples (0-15 cm) were collected from the region of Banja Luka (Bosnia and Herzegovina), in order to evaluate their radioactivity. Concentrations of radionuclides in samples were determined by γ-ray spectrometer using HPGe detector. The obtained results of uranium and thorium series as well as potassium K-40 and Cs-137 activity concentrations are discussed. The radioactivity...
Dr
Andrzej Grosicki
(National Veterinary Research Institute, Department of Radiobiology, Pulawy, Poland)
19/04/2010, 11:45
Radionuclides in the Environment, Radioecology
Poster
An increased level of caesium radioisotopes was noted in many foodstuffs after the Chernobyl disaster. The radiocaesium activity concentrations may remain high in products such as game meat, wild mushrooms, and forest berries. Therefore, an official monitoring of radiocaesium in game meat was established by Polish Veterinary Inspection. Generally, consumption of game meat in Poland is low....
Dr
Ashraf Khater
(King Saud University)
19/04/2010, 11:45
Radionuclides in the Environment, Radioecology
Poster
Phosphate rock beneficiation processes (crushing, screening, washing, magnetic separation and wet screening) aims to increase the phosphorus content of the run-of-mine (ROM) ore. It starts with the ROM ore and ends with the wet rock, and different rejects (by-products). These by-products have potential environmental hazards due to their content of Naturally Occurring Radioactive Materials –...
Dr
Abdisamat Vasidov
(senior staff scientist)
19/04/2010, 11:45
Radionuclides in the Environment, Radioecology
Poster
Vasidov A.,Salikhbaev U.S., Kist A.A., Raduyk R.I.
Institute of Nuclear Physics, Tashkent, Uzbekistan
Central Asia Countries were the main supplier of the uranium in former USSR and one of them was the Republic of Uzbekistan. As a mining activity and conversion of uranium ores had resulted to formation large amounts of radioactive wastes, that had have make an exigency problem, as...
Prof.
Viacheslav Radchenko
(JSC "State Scientific Center - Research Institute of Atomic Reactors")
19/04/2010, 11:45
Chemistry of Actinide and Trans-actinide Elements
Poster
Over many years JSC “SSC RIAR” has been performing activities on the production and in-vestigation of metals of transplutonium elements (TPE), their alloys and compounds.
This paper presents the results of production and radiographic examination of micro-samples of curium-244 compounds with ion, cobalt and carbon, namely an identification of crystal lattices of the compounds obtained and...
Mr
Nikolay Aksenov
(Flerov Laboratory of Nuclear Reactions, Joint Institute for Nuclear Research)
19/04/2010, 11:45
Chemistry of Actinide and Trans-actinide Elements
Poster
In order to optimize conditions for isolation and study of chemical properties of Rf and Db [1], we investigated sorption of their lighter homologues Ti, Zr, Hf, Nb and Ta, from HF solutions in water-miscible organic solvents using the Dowex 50x8 cation exchange (CIX) and AG 1x8 anion exchange (AIX) resins. We studied dependence of sorption on concentration of HF and acetone. We found that...
Ms
Violeta Hansen
(Radiation Research Department, Risø National Laboratory for Sustainable Energy,Technical University of Denmark- DK-4000 Roskilde, Denmark)
19/04/2010, 11:45
Radionuclides in the Environment, Radioecology
Poster
Long physical half life, long residence time in the marine environment and continuous releases from nuclear fuel reprocessing plants make 129I a suitable tracer for the study of marine geochemical cycle of stable iodine and conversion mechanism of iodine species by speciation analysis of 129I and127I. Up to date there are few data on chemical speciation of 129I in seawater and no 129I...
Ms
Violeta Hansen
(Radiation Research Department, Risø National Laboratory for Sustainable Energy,Technical University of Denmark – DTU)
19/04/2010, 11:45
Radionuclides in the Environment, Radioecology
Poster
Iodine is a biophilic tracer element with thirty-four isotopes including one long-lived isotope, 129I (15,7 My), and one stable isotope, 127I. Toxicity, mobility, bioavailability, bioactivity, and the uptake of iodine in environment are governed by its chemical speciation and the soil or sediment conditions. It is therefore important to identify and quantify different physicochemical...
Mr
Toni Petrovic
(Student of Jožef Stefan International Postgraduate School, Ljubljana, Slovenia)
19/04/2010, 11:45
Radionuclides in the Environment, Radioecology
Poster
The European legislation (Council Directive 98/83/ec) requests the member sates to control the radioactive contamination of drinking water. As a part of these measurements γ-ray spectrometric measurements are performed. Samples of 50 L of water are evaporated and the residue after evaporation is measured. Typically, 20 g – 40 g of residue is obtained.
Since by γ-ray spectrometry activity...
Ms
Galina Sokolik
(Belarus State University)
19/04/2010, 11:45
Radionuclides in the Environment, Radioecology
Poster
Alpha-emitting uranium and radium are present practically in all ecosystems and together with their decay products play an important role in formation of internal radiation dose of population from natural radionuclides. This dose depends essentially not only on the content of radionuclides in environmental components, but also on the radionuclides’ state and migratory ability in a soil...
Ms
Natallia Torapava
(Swedish University of Agricultural Sciences)
19/04/2010, 11:45
Chemistry of Actinide and Trans-actinide Elements
Poster
The hydrated thorium(IV) ion is nine-coordinate in strongly acidic aqueous solution with a mean Th-O bond distance of 2.45(1) Å as determined by extended X-ray absorption fine structure (EXAFS) and large angle X-ray scattering (LAXS) [1]. The presence of a second hydration sphere was indicated by LAXS with cca 18 water molecules at 4.66(2) Å. Structural studies in aqueous solution of the...
Dr
Alegria Natalia
(University of the Basque Country)
19/04/2010, 11:45
Radionuclides in the Environment, Radioecology
Poster
From the Sun and interstellar spaces of the universe the primary cosmic radiation comes to the Earth. These cosmic rays interact with the nuclei of atmospheric constituents, producing an interaction cascade and secondary reaction and also produce a number of radioactive nuclei known as cosmogenic, 7Be between others as a result of spallation reactions.
In Bilbao (north of Spain) there is a...
Mr
Alexander Osipenko
(Research Institute of Atomic Reactors)
19/04/2010, 11:45
Chemistry of Actinide and Trans-actinide Elements
Poster
Molten chlorides have more high radiation resistance than aqueous and organic media. This fact is of significant importance because curium has a high specific activity. And, correspondingly, it can be used for partitioning of curium from waste before its vitrification. Data on thermodynamics of formation for oxygen-containing curium compounds in chloride melts was obtained by authors [1] with...
Dr
Yuliya Pykhova
(Nizhny Novgorod State University named after N.I. Lobachevsky)
19/04/2010, 11:45
Chemistry of Actinide and Trans-actinide Elements
Poster
Synthetic trogerite (UO2)3(AsO4)2∙12H2O (henceforth only ST) can be obtained by direct mixing of uranyl nitrate and arsenic acid solutions in equivalent ratio 3:2. In this case the following competitive reactions become possible:
UO2(NO3)2 + H3AsO4 +...
Dr
Kil Yong Lee
(Korea Institute of Geoscience and Mineral Resources)
19/04/2010, 11:45
Radionuclides in the Environment, Radioecology
Poster
Emanation of radon (222Rn) from rock and partition of radon between water and air are important parameters, so its evaluation is of significance in the study of radiation protection, environmental geochemistry, climate change and so on. In this study, emanation of radon from rock particles (1-2 mm) to water and partition of radon between water and air by temperature of 0, 10 and 20...
Róbert Janovics
(Institute of Nuclear Research of the HAS, Debrecen, Hungary)
19/04/2010, 11:45
Radionuclides in the Environment, Radioecology
Poster
Automatic water sampling unit was developed in Herteleni Laboratory of Environmental Studies of MTA ATOMKI for monitoring the radioactive emission from nuclear facilities into the groundwater. The efficiency of existing and renewed geometry units and the reproducibility of survey data have been examined in the course of this work. A testing method was developed for this purpose, and ion...
Mr
Mikalai Puzan
(NATIONAL ACADEMY OF SCIENCES OF BELARUS State scientific institution "Institute of Radiobiology")
19/04/2010, 11:45
Radionuclides in the Environment, Radioecology
Poster
The Chernobyl accident was accompanied by release into the atmosphere of a large number of radionuclides with long half-life. As a result of exposure to biological objects most dangerous in the long term are included in the composition of the fuel particles transuranic elements (TUE-239, 240Pu, 241Am), are a - emitters. Radionuclides with different half-life and environmental features included...
Mrs
Lyudmila Ishchenko(Krivoshey)
(Ukrainian Research Institute of Industrial Medicine, Krivoy Rog, Ukraine)
19/04/2010, 11:45
Radionuclides in the Environment, Radioecology
Poster
N. Karnaukh, L. Ishchenko
Some regions of Ukraine are Radon dangerous. Geologic peculiarities of Krivbass region, available mining tunnels, historic habits in housing construction, decreased morbidity on malignant tumor of population specify the actuality of “Radon” problem studying in iron-ore region which should be consider at estimation of radiation exposure to population.
By our own...
Mr
Alexey Serov
(PhD Student)
19/04/2010, 11:45
Chemistry of Actinide and Trans-actinide Elements
Poster
Investigation of chemical properties of super heavy elements (SHE) produced in 48Ca induced nuclear fusion reactions with actinide targets [1-4] represents a challenging task for chemists world wide. In the present research an experimental determination of dHads. of carrier-free 113mIn, 125Sb and 125mTeO2 species on quartz surface was performed.
Lighter homologues of SHE elements...
Dr
Akira Kirishima
(Institute of Multidisciplinary Research for Advanced Materials, Tohoku University)
19/04/2010, 11:45
Chemistry of Actinide and Trans-actinide Elements
Poster
The thermodynamics of complex formation of U(VI) with oxydiacetic acid (ODA), thiodiacetic acid (TDA), iminodiacetic acid (IDA), isopthalic acid (IPA), 2,5-frandicarboxylic acid (FDA) and dipicolinic acid (DPA) were studied by the micro-calorimetric titration technique. So far, extensive data on stability constant have been obtained and summarized in databases for a variety of combinations of...
Prof.
Karin Popa
(“Al.I. Cuza University”, Department of Chemistry, 11 – Carol I Blvd., 700506 – Iasi, Romania)
19/04/2010, 11:45
Radionuclides in the Environment, Radioecology
Poster
The present study follows the extent of translocation radioactivity from substrates of uranium and sulphur mining area to the macromycetes spontaneously occurred during 2008-2009. To this end, radioactivity measurements (gross α+β, 226Ra, and 137Cs) on both macromycetes and their substrates were made. The resultants obtained were confirmed by FT-IR spectroscopy, evidencing the presence of...
Mr
Stefan Bister
(Leibniz University Hanover; Center for Radiation Protection and Radioecology)
19/04/2010, 11:45
Radionuclides in the Environment, Radioecology
Poster
The Mulde River, a tributary of the Elbe River in east-central Germany, is formed by the confluence of the Freiberger Mulde and the Zwickauer Mulde, both rising from the Erzgebirge. Running north, the two rivers merge near the small village of Sermuth to form the Vereinigte Mulde, which flows into the Elbe River near Dessau. The Erzgebirge or Ore Mountains are a mountain range, which is...
Dr
Andrzej Grosicki
(National Veterinary Research Institute, Department of Radiobiology, Pulawy, Poland)
19/04/2010, 11:45
Radionuclides in the Environment, Radioecology
Poster
Examinations were carried out to compare the effects of Prussian Blue (PB), Ca-gluconate, and Na-citrate on removal of radioceasium from male Wistar rats. The animals were randomly divided into 5 groups of 10 animals each. Radioceasium was administered by intragastric intubation to all tested rats for 5 concecutive days with a daily dose of 20 kBq. Animals in group 1 (the controls) were...
Prof.
Mauro L. Bonardi
(Radiochemistry Laboratory, LASA, Università degli Studi di Milano and INFN-Milano, via F.lli Cervi 201, I-20090 Segrate, Milano, Italy)
20/04/2010, 03:00
This work is focused on production of Lu-177g for uses in metabolic radiotherapy of tumors, due to the appropriate average beta- energy and gamma rays suitable for detection by gamma-camera and SPET: t1/2 = 6.734 d, b- 100 %, Ebeta-max = 489.3 keV, <E> = 163 keV, main Eg = 113 and 208 keV. It is one of the most promising beta- emitters for small cancers. The production methods are either...
Prof.
Heinz Gaeggeler
(Paul Scherrer Institut)
20/04/2010, 03:00
Prof.
Gabriele Wallner
(Institut für Anorganische Chemie, Universität Wien)
20/04/2010, 03:30
Radionuclides in the Environment, Radioecology
Verbal
As an EU country, Austria has to meet the European Community guideline concerning waters for consumption; here a Total Indicative Dose of 0.10 mSv per year for all nuclides with the exception of tritium, potassium-40, radon and radon progeny, is fixed. In our investigation we measured the radium isotopes Ra-226 and Ra-228, the uranium isotopes U-248 and U-234, as well as Pb-210 and Po-210;...
Dr
Marin Ayranov
(Paul Scherrer Institut)
20/04/2010, 03:30
The station for pions cancer therapy was operated at PSI from 1980 to 1992. For this period the copper beam dump of the facility received a total dose of approx. 0.16 Ah of 590 MeV protons. The sampling collected about 500 g of high active copper chips that can be used for separation of exotic radionuclides. The γ analyses showed main nuclides present to be 60Co, 54Mn,...
Dr
Dagmara Strumińska-Parulska
(University of Gdańsk)
20/04/2010, 03:50
Radionuclides in the Environment, Radioecology
Verbal
Radionuclides existing in the environment, both natural and artificial, are accumulated in plants and animals and transferred through the trophic chain. They are also transported with river from their catchments’ areas. The activities of polonium 210Po, uranium (234U, 238U) and plutonium (238Pu, 239+240Pu) were measured in the biggest...
Prof.
Alex Hermanne
(Cyclotron, Vrije Universiteit Brussel)
20/04/2010, 04:00
At present the preferred route for 123I (T1/2 = 13.2 h) production is bombardment of highly enriched 124Xe with 35 MeV protons and taking advantage of the cascade decay 123Cs-123Xe-123I. After irradiation the gas targets are allowed to cool for 7 h ensuring optimal in-growth of 123I from its precursors. A separation...
Dr
LJUDMILA BENEDIK
(Jožef Stefan Institute)
20/04/2010, 04:10
Radionuclides in the Environment, Radioecology
Verbal
It is well known that water contains dissolved radionuclides from uranium and thorium decay chains. Their concentrations are variable and depend on the nature of the aquifer rock types and the prevailing lithology. Quantitative information about the activity concentrations of critical alpha emitting radionuclides in the food and drink is important in the study of cumulative radiation effects...
Dr
Md. Shuza Uddin
(Institut für Neurowissenschaften und Medizin, INM-5: Nuklearchemie, Forschungszentrum Jülich, D-52425 Jülich, Germany)
20/04/2010, 04:15
The radionuclide 193mPt (T1/2 = 4.33 d), a high spin isomer, decaying by highly converted isomeric transition, emits about 33 Auger electrons per decay. It is of great potential interest in internal radiotherapy because of its suitable decay properties and platinum-complexes (like cis-platin and others) used in chemotherapy, i.e., potent antitumor agents. In order to...
Mr
Stefan Söllradl
(Technische Universität München)
20/04/2010, 05:00
Neutron Activation Analysis (NAA) is a well established method for non-destructive determination of elemental composition and the analysis of trace elements. Prompt Gamma Neutron Activation Analysis (PGAA or PGNAA) is a complementary radioanalytical technique to NAA for non-invasive investigations of samples with neutrons.
One of the main advantages of this latter technique is the easy...
Prof.
Pavel Povinec
(Comenius University)
20/04/2010, 05:00
Radionuclides in the Environment, Radioecology
Verbal
The dominant development in the radiometrics techniques has been the utilisation of large HPGe detectors in underground laboratories with anti-cosmic or anti-Compton shielding for the analysis of short and medium-lived radionuclides in the environment. They have included applications of high efficiency HPGe detectors (up to 200% relative efficiency to a 75 mm diameter, 75 mm long NaI(Tl)...
Dr
Galina Lujaniene
(Institute of Physics, Savanorių ave 231, Vilnius, LT-02300, Lithuania)
20/04/2010, 05:30
Radionuclides in the Environment, Radioecology
Verbal
Sorption–desorption behaviour of Cs, Pu and Am in the system was studied using data obtained from different sampling campaigns in the Baltic Sea and the Curonian Lagoon in 1999-2009 as well as from short- and long-term kinetic tracer experiments using natural sea or river water and bottom sediments collected in the Curonian Lagoon or the Baltic Sea. Sorption experiments were carried out with...
Dr
Radojko Jacimovic
(Jozef Stefan Institute, Ljubljana, Slovenia)
20/04/2010, 05:30
Various trace elements in different types of iron based geological reference materials [JSS 804-1 (hematite), JSS 820-2 (limonite), SU-1 and SU-1a (iron-nickel-copper-cobalt ores)] were investigated using k0-NAA in both forms: instrumental (k0-INAA) and radioanalytical (k0-RNAA).
To avoid the interference of iron as a matrix element, firstly mineral was dissolved in aqua regia then...
Mr
Marko Štrok
(Jožef Stefan Institute)
20/04/2010, 05:50
Radionuclides in the Environment, Radioecology
Verbal
During the International Scientific Cruise to Adriatic and Ionian Seas organised by the International Atomic Energy Agency (IAEA), sediment and rock samples were collected at different locations. Sediments were sampled with grab corer at six locations in the middle and south Adriatic Sea. Rocks were collected on three islands (Palagruža, Brusnik, Jabuka) in the Adriatic Sea. In the samples,...
Mr
Fulvio Farina Arboccò
(Ghent University; SCK-CEN)
20/04/2010, 05:50
Reactor channel characterization is commonly performed by irradiation of bare and cadmium-covered
"fluence rate-monitors", avoiding as much as possible the use of irradiation vials/capsules and spacers for positioning
the monitors inside the channel.
However, in routine k0-Neutron Activation Analysis is generally necessary to pack the samples in polyethylene vials
prior to...
Ms
Svetlana Ovsiannikova
(Belarus State University)
20/04/2010, 06:10
Radionuclides in the Environment, Radioecology
Verbal
One of the most important factors determining the radioecological situation in the terrestrial ecosystems is the radionuclide species in a soil medium. Radionuclide forms determine the processes of their entrance into the soil solutions, redistribution in soils, migration to the surface, ground and underground waters and spreading outside of the contaminated area.
The present work is devoted...
Ms
Marie Kubešová
(Nuclear Physics Institute, Czech Academy of Sciences)
20/04/2010, 06:10
Verbal
Dr
Erich Wieland
(Paul Scherrer Institute)
20/04/2010, 08:00
Chemistry of Nuclear Fuel Cycle, Radiochemical Problems in Nuclear Waste Management
Verbal
Cement-based materials play an important role in multi-barrier concepts developed worldwide for the safe disposal of low- and intermediate-level radioactive waste. Cement is used to condition the waste materials and for the construction of the engineered barrier system (container, backfill and liner materials) in deep geological repositories. The cementitious near field is subject to chemical...
Dr
Soenke Szidat
(University Of Bern)
20/04/2010, 08:00
14C measurements of samples containing 5-50 µg carbon allow dating of archeological artifacts or environmental materials with only traces of organic carbon. Furthermore, fossil and non-fossil sources of carbonaceous aerosols can be apportioned using such measurements (Szidat, 2009). The widely-used preparation of solid targets for 14C measurements, however, often remains the weak point of 14C...
Prof.
Flavia Groppi
(Radiochemistry Laboratory, LASA, Università degli Studi di Milano and INFN-Milano, via F.lli Cervi 201, I-20090 Segrate, Milano, Italy)
20/04/2010, 08:30
Usually, the lack of information cause to be afraid about what we don’t know, imputing to it a greater hazard. On the contrary we face up without fear activities that have a high level of riskiness, but for which we have direct experience. In other worlds the subjective perception of the risk very often doesn’t correspond to the objective and real risk of an activity. In particular the...
Mr
Fidelis Sameh Ebong
(Loughborough University)
20/04/2010, 08:30
Chemistry of Nuclear Fuel Cycle, Radiochemical Problems in Nuclear Waste Management
Verbal
At present the immobilisation of High Level Waste (HLW) in vitreous matrices followed by their burial in deep geological repository systems, composed of natural and engineered barriers to isolate the long lived radionuclides from the biosphere is the most preferred procedure. Granitic rock formations are being considered as host rocks for such geological repositories1. The study of the...
Ms
Claudia Landstetter
(Austrian Agency for Health and Food Safety; CC Radiation Protection and Radiochemistry)
20/04/2010, 08:50
Environmental samples in Upper Austria have been measured for 90Sr in the year 2005. These measurements were conducted on behalf of the Federal Ministry of Agriculture, Forestry, Environment and Water Management and were part of a project called “Temelin Project”. The aim of this project which started in 1992 is to detect any radiological impact of the nuclear power plant Temelin in...
Mr
Ricky Hallam
(Loughborough University)
20/04/2010, 08:50
Chemistry of Nuclear Fuel Cycle, Radiochemical Problems in Nuclear Waste Management
Verbal
Technetium-99 is one of the most important isotopes likely to be disposed of in the proposed UK Geological Disposal Facility (GDF) for higher-activity radioactive wastes. This is due to its long half life (2.13 x 105 y), fission yield (6%), and its ability to migrate through soils and other environmental components when in its oxidised, pertechnetate, TcO4- form. However, much of the...
Ms
Claudia Joseph
(Forschungszentrum Dresden-Rossendorf, Institute of Radiochemistry)
20/04/2010, 09:10
Chemistry of Nuclear Fuel Cycle, Radiochemical Problems in Nuclear Waste Management
Verbal
In various countries clay is discussed as possible host rock for a nuclear waste repository. The interaction of the clay with actinides, especially U(VI), is the focus of our work. Sorption experiments were performed to estimate the actinide migration in clay formations. Also the influence of humic acid (HA) is investigated. HA are ubiquitously found in natural environments and can interact...
Dr
Mihály Molnár
(MTA ATOMKI)
20/04/2010, 09:10
Fossil fuel CO2 content in the air of a major Hungarian city (Debrecen) was determined using together measurement of CO2 mixing ratio and radiocarbon (14C) content of air.
In this project we developed a high precision atmospheric CO2 monitoring station in Debrecen. An integrating sampling system (developed by ATOMKI) was applied for radiocarbon measurements. One sampler was installed in...
Prof.
Tobias Reich
(Johannes Gutenberg-Universität Mainz, Institute of Nuclear Chemistry)
20/04/2010, 10:00
Chemistry of Nuclear Fuel Cycle, Radiochemical Problems in Nuclear Waste Management
Verbal
The sorption of Np(V) on Na-montmorillonite (STx-1) has been studied by batch experiments, spectroscopic measurements, and surface complexation modelling with the aim to contribute toward a better understanding of the sorption of 237Np (t1/2 = 2.1 × 106 a) in the near field (bentonite backfill material) and far field (argillaceous rocks) of high-level nuclear waste repositories. Batch...
Dr
Sneh Jain
(Loughborough University)
20/04/2010, 10:30
Chemistry of Nuclear Fuel Cycle, Radiochemical Problems in Nuclear Waste Management
Verbal
Heavy metals present in the environment such as cadmium are considered harmful due to their toxicity. Adsorption-desorption reactions of metals from aqueous solutions to the soil play an important role in influencing the accumulation and transport of metal contaminants. These are affected by the surface and chemical properties of the soil components.
Sorption and desorption of Cd2+ has...
Dr
Antonín Vokál
(Nuclear Research Institute Řez plc)
20/04/2010, 10:50
Chemistry of Nuclear Fuel Cycle, Radiochemical Problems in Nuclear Waste Management
Verbal
Repositories for radioactive wastes are sited in the environment with very low permeability. One of the most important processes leading to the release of radionuclides to the environment is diffusion and therefore data for its evaluation are very important for the results of performance assessment of these repositories. These data are obtained usually from the evaluation of laboratory...
Dr
Mojmír Němec
(CTU FNSPE, centrum pro radiochemii a radiační chemii)
20/04/2010, 11:45
The world demand for ultratrace analyses of radionuclides with long half-lives has been increasing not only in dating, material, environmental, geo-and cosmochemical studies, but also recently in the pharmaceutical and pharmacological applications. The most sensitive tool for such analyses is the dynamically advancing method of Accelerator Mass Spectrometry (AMS) which enables the...
Prof.
Jukka Lehto
(Laboratory of Radiochemistry, Department of Chemistry, University of Helsinki)
20/04/2010, 11:45
129I is a long-lived beta-emitting (Emax 154,4 keV) radioisotope of iodine. Its half-life is 15,7 million years. 129I is produced mainly by human nuclear activities and especially it has been released to the environment from the spent nuclear fuel reprocessing plants. In the pre-nuclear era 129I/127I ratios in the environment were...
Dr
Peter Steier
(VERA Laboratory, Faculty of Physics – Isotope Research, University of Vienna, Währingerstr. 17, A-1090 Vienna, Austria)
20/04/2010, 11:45
236U (half-life 23∙Myr) is produced in uranium ore via thermal neutron capture on 235U. The neutrons originate mainly from (α,n) reactions caused by α-particles from the uranium decay series. The equilibrium ratio of 236U/U in natural ore is proportional to the thermal neutron flux, which is expected to be proportional to the uranium concentration...
Dr
Jiří Janda
(NBC Defence Institute Vyškov, University of Defence CZ), Dr
Petr Sládek
(NBC Defence Institute Vyškov, University of Defence CZ)
20/04/2010, 11:45
Airborne and terrain gamma-ray spectrometry are very effective methods for radiation control in environment, prospecting of radioactive contamination and localization of radioactive sources. These methods were proved in the system of the military radiation reconnaissance and radiation monitoring of the Czech Armed Forces. The IRIS-XP airborne gamma-ray spectrometer (4x4 liters NaI(Tl)...
Ms
Tasoula Kiliari
(PhD student, Department of Chemistry, University of Cyprus)
20/04/2010, 11:45
The radioactivity concentration of uranium and plutonium isotopes (Pu-236 and U-232) in water samples has been determined by means of alpha spectroscopy after chemical separation of the radionuclides by cation exchange and liquid-liquid extraction using the Chelex-100 resin and 30%TBP/dodecan. Method calibration using Pu-236/U-232 standard solutions results in a detector efficiency of 19% and...
Ms
Eleni Constantinou
(Radioanalytical and Environmental Chemistry Group , Department of Chemistry, University of Cyprus)
20/04/2010, 11:45
The aim of this study is the radiometric determination of uranium in waters by liquid scintillation counting (LSC) after pre-concentration of the element by cloud point extraction (CPE). For CPE, tributyl phosphate (TBP) is used as the complexing agent and (1,1,3,3-Tetramethylbutyl)phenyl-polyethylene glycol (Triton X-114) as the surfactant. The measurement is performed after phase separation...
Dr
Neil Gibson
(European Commission, IHCP - JRC, Ispra)
20/04/2010, 11:45
Production and Application of Radionuclides
Poster
The need for toxicity assessment of industrially relevant nanoparticle materials implies that in vitro and in vivo biokinetics studies are required. Radiolabelled nanoparticles are an excellent candidate for such biodistribution measurements and are also of high interest for particle tracing and fate studies in other areas.
We describe here an external target system for direct activation of...
Mr
K.B. Dasari
(GITAM Institute of Science, GITAM University, Visakhapatnam – 530 045, India)
20/04/2010, 11:45
Studies of archaeological artifacts constitute an important area of research that might provide clues to unravel the past human activities, art, trade etc. Archaeologists are mainly interested in the provenance studies of the artifacts. Archaeological artifacts like potteries, bricks, coins and paintings are mainly studied for their provenance and one of the valid, and accepted methods is...
Dr
Dung Manh Ho
(Technological and Nuclear Institute, Sacavem, Portugal)
20/04/2010, 11:45
Compton suppression system (CSS) in conjunction with γ-ray spectrometer allows to lower the detection limits for certain elements by reducing the background levels in the acquired γ-ray spectra. The calibration of CSS for use in the k0-based neutron activation analysis (k0-NAA) has been performed in normal mode and applied to Compton suppression mode. In this case,...
Prof.
Elio Tomarchio
(University of Palermo - Nuclear Engineering Department)
20/04/2010, 11:45
Neutron irradiator facilities with 241Am-Be sources are worldwide available in order to perform neutron activation analysis (NAA), to investigate materials in different research areas or to test and calibrate neutron detectors and environmental or personal dosemeters. The use of a neutron irradiator is advantageous because have a very stable neutron flux, even it is many orders of magnitude...
Dr
Pisutti Dararutana
(Army Officer)
20/04/2010, 11:45
Cultural heritage objects are highly heterogeneous. Due to the complex nature of materials and objects, their analysis needs to use extremely sensitive, spatialy resolved, multi-elemental and versatile methods that should be as a non invasive as possible and give complementary information at different scales; from the macroscopic to the namometer scales. In this work, XRF, SEM-EDS, PIXE, EPMA...
Dr
md anawar hossain
(Instituto Tecnológico e Nuclear Reactor, Apartado 21, E.N. 10, 2686-953, Sacavém, Portugal)
20/04/2010, 11:45
Assessment of contamination levels and dispersion in a mining impacted area by INAA and Micro-PIXE analysis
H. M. Anawar, M. C. Freitas, H. M. Dung
Instituto Tecnológico e Nuclear Reactor, Apartado 21, E.N. 10, 2686-953, Sacavém, Portugal,
E-mail: anawar4@hotmail.com
Past mining activities, random disposal without poorly precautionary and rehabilitation measures, erosion, leaching,...
Dr
Marcel Ohera
(EnviMO Brno Czech Republic)
20/04/2010, 11:45
The portable PGIS-128 gamma-ray spectrometer, produced by Pico Envirotec, Inc., Canada, was originally designed for the geological purposes and the determination of K, U and Th concentrations in soil and rocks. The device is fully calibrated for K, U and Th. However, its functions have been extended, and now the gamma-ray spectrometer is available with the dose rate function (in nGy/h) and the...
Dr
Steffen Happel
(TrisKem International)
20/04/2010, 11:45
Production and Application of Radionuclides
Poster
Cu isotopes (e.g. Cu-64) increasingly find use in radiopharmaceutical applications, accordingly fast and reliable methods for the production of these isotopes are needed. Aim of the presented project is the characterization of a Cu selective extraction chromatographic resin for the fast and selective separation of Cu radionuclides e.g. from irradiated Ni targets. The characterization of the...
Mr
Nuno Canha
(Instituto Tecnológico e Nuclear)
20/04/2010, 11:45
At Sao Domingos mining (southern Portugal near Spanish border), we have collected soils and vascular plants growing there 1-3. The values we found for arsenic in soils were between 400 and 3600 mg/kg. All the plants we could find growing there were: Agrostis castellana Boiss. & Reuter; Corrigiola litoralis L.; Erica andevalensis Cabezudo & Rivera; Erica australis L.; Eucalyptus...
Mr
Jan Kameník
(Nuclear Physics Institute, Academy of Science of the Czech Republic)
20/04/2010, 11:45
The silica phytoliths, also called biogenic opals, are formed in many plant species. It has been found that information on their chemical composition is limited, except for several major elements. Comparison of different methods for isolation of silica phytoliths from plant material was performed in this work. Dry ashing and acid digestion were used and their influence on chemical composition...
Prof.
Alexandru Cecal
("Al.I. Cuza" University, Faculty of Chemistry)
20/04/2010, 11:45
The paper deals with the corrosion kinetics of some steels using two different methods of investigation. The first one is a radiochemical method based on the retention of β-rays emitted by a 204Tl source, by the iron ions transferred into the solution by anodic dissolution of metal samples. The second one is based on the atomic absorption spectroscopy, follows the increase in time...
Dr
Zoltán Németh
(University of Pannonia Institute of Radiochemistry and Radioecology)
20/04/2010, 11:45
Production and Application of Radionuclides
Poster
Decontamination technologies are generally developed to reduce the collective dose of the maintenance and operation personnel at NPPs. The highest efficiency (i.e., the highest DF values) available without detrimental modification of the treated surface of structural material is the most important goal in the course of the application of a decontamination technology. The AP-CITROX procedure...
Dr
Zs. Revay
(Department of Nuclear Research, Institute of Isotopes, H-1525 Budapest, Hungary)
20/04/2010, 11:45
Zirconium and its alloys are important materials in nuclear power technology. Zirconium alloys namely zircaloy 2, zircaloy 4 and Zr-Nb alloy are mostly used for fuel cladding and pressure tubes in water-cooled nuclear power reactors due to their low neutron absorption cross section, high corrosion resistance and good thermal conductivity. For nuclear quality control, it is important to analyze...
Mrs
Andrea Szabó Nagy
(István Széchenyi University Department of Physics and Chemistry)
20/04/2010, 11:45
Chemistry of Nuclear Fuel Cycle, Radiochemical Problems in Nuclear Waste Management
Poster
Evaluating the water chemistry in the primary circuit and the effect of chemical decontamination of the heat exchanger tubes performed by the AP-CITROX (AP: alkaline permanganate; CITROX: citric and oxalic acid) procedure at Paks NPP (Hungary), a project dealing with the comprehensive investigation of the general corrosion state of the steam generators (SGs) has been initiated. Owing to the...
Mr
Pawel Grabowski
(Technical University of Lodz, Faculty of Chemistry)
20/04/2010, 11:45
Among of the naturally occurring radionuclides in the different types of water the long lived uranium isotope 238U, two radium isotopes: 228Ra, 226Ra, and 210Po are of practical importance due to their radiotoxicity. The observed levels of these radionuclides in underground water depend on the chemical compositions of the adjacent geological...
Dr
Galina Lujaniene
(Institute of Physics)
20/04/2010, 11:45
Radioanalytical method for the determination of radionuclides so called “difficult to determine” has been developed to characterize liquid and solid operational low and intermediate level radioactive waste. The main steps of the method involve digestion of sample of various matrixes, primary separation of radionuclides from matrix with the aim to reduce high γ activities and final...
Mrs
Gabriela Wallova
(Institute of Inorganic Chemistry, University of Vienna)
20/04/2010, 11:45
Environmental monitoring of hazardous radionuclides is an important issue. 90Sr can be found in the environment due to the global fallout from atmospheric nuclear explosions and the Chernobyl accident in 1986. It is one of the most hazardous fission products due to its chemical similarity with calcium, because it can be accumulated in bone tissue delivering irradiation doses to the...
Prof.
Amares Chatt
(Dalhousie University)
20/04/2010, 11:45
Magnesium is considered as an essential element at moderate levels. Both deficiency and toxic effects of Mg in humans have been reported in the literature. Titrimetry, spectrophotometry, and atomic absorption spectrometry are generally used for the measurement of Mg levels. Instrumental NAA (INAA) is also an attractive tool for the rapid, simple and reliable determination of Mg. However, due...
Ms
Catarina Galinha
(CERENA-IST, Technical University of Lisbon)
20/04/2010, 11:45
The increasing attention paid to the role of selenium (Se) and selenoproteins in human health stems from an equally growing body of evidence on their actual (general) importance for a healthy immune system, and on their protective (specific) effects against cardiovascular disease, asthma, male sterility, and, especially, certain forms of cancer. The current Recommended Dietary Allowance (RDA)...
Dr
Kallola Kumar Swain
(BHABHA ATOMIC RESEARCH CENTRE, MUMBAI, INDIA)
20/04/2010, 11:45
Many copper ores contain significant quantities of silver and gold. Copper concentrate, the intermediate in the ore processing, is an important source for production of gold and silver. Methods for determination of noble metals have been reviewed by Beamish and Van Loon [1]. The most common method for determination of noble metals in geological sample is atomic absorption spectrometry with a...
Mr
Andrius Puzas
(Institute of Physics, Savanoriu ave. 231, Vilnius LT-02300, Lithuania)
20/04/2010, 11:45
In nuclear energetics is very important to handle radioactive waste properly. After closing nuclear facility significant amounts of radioactive waste will occur, which disposal will depend on their activity. The main source of radioactivity in the NPP’s equipment are the neutron activation products. Their amounts depend on the elemental composition of materials used for building a nuclear...
Dr
Daniel Beasley
(Reactor-ITN, Technological and Nuclear Institute, E.N. 10, 2686-953 Sacavem, Portugal)
20/04/2010, 11:45
The fast pneumatic transfer system (SIPRA) for short irradiations at the Portuguese research reactor has been upgraded with a new spectrometer incorporating Zero-DeadTime corrections and new software for use alongside a modern computer. The development of cyclic NAA based on the k0 methodology for SIPRA has been performed. To ensure the accuracy of the system for very short lived nuclides...
Dr
Myroslav Zoriy
(Reserch Center Jülich)
20/04/2010, 11:45
Technetium is a one of product of nuclear fission of uranium and therefore could be found in a trace concentration in the Earth’s crust. It was estimated that a kilogram of uranium contains 1 nanogram (10−9 g) of technetium [1]. However, besides of naturally occurred Tc, in the last several decades its relatively high amount was artificially produced in the nuclear reactors by the thermal...
Dr
Ivo Světlík
(Nuclear Physics Institute AS CR, Na Truhlarce 39/64, 180 86 Prague)
20/04/2010, 11:45
The gross alpha activity is defined as the total activity of the alpha emitters. Gross alpha and beta activity screening methods have been developed to determine if radionuclides specific analysis is required to further characterize the water. There may be a loss of radionuclides during storage of water sample caused by the adsorption onto the container wall and by the precipitation and...
Mr
Jan Ráliš
(Nuclear Physics Institute of the ASCR, v.v.i.)
20/04/2010, 11:45
Production and Application of Radionuclides
Poster
Non-conventional longer-lived PET radionuclides with half-life higher than that of 18F (109 min) are very promising PET tracers for imaging of biochemical processes or body structures requiring slower kinetics. Among them, 124I (4.18 d) plays an important role. Radiochemistry of iodine radioisotopes (123I, 124I, 125I and 131I)...
Dr
Maria Angela Menezes
(Nuclear Technology Development Centre / Brazilian Commission for Nuclear Energy, Division for Reactor and Analytical Techniques, Belo Horizonte, Brazil)
20/04/2010, 11:45
Many laboratories apply the k0-INAA and several of them use comparators and spread sheet instead of neutron flux monitors and software for analysis and calculations. At the Laboratory for Neutron Activation Analysis, CDTN/CNEN, two variations of the k0-INAA are used, one is called in house k0-“monostandard” method - using comparator - and the other is the well known k0-standardization method -...
Dr
Ondřej Lebeda
(Nuclear Physics Institute, Academy of Sciences of the Czech Republic)
20/04/2010, 11:45
Production and Application of Radionuclides
Poster
Cross sections for deuteron induced reactions on natural molybdenum leading to 93Tc, 93mTc, 94Tc, 94mTc, 95Tc, 95mTc, 96Tc, 96mTc, 99mTc, 99Mo, 92mNb, 95Nb and 89Zr were measured in deuteron energy range 9.0–19.6 MeV on the cyclotron U-120M of the Nuclear Physics Institute AS CR. Special attention was paid to excitation function for formation of 95mTc, which is used as a tracer for determining...
Dr
Luong Hien Duong
(Joint Venture “Vietsovpetro”)
20/04/2010, 11:45
The k0-based instrumental neutron activation analysis (k0-INAA) using the Dalat research reactor of 500 kW nominal power with a thermal neutron flux about 3.5 1012 cm-2.s-1 has been studied and developed in order to determine Hg (total) in Bach Ho crude oil of Vietnam. Both radionuclides 197Hg (2.7d half-life, 77.3keV gamma-line) and 203Hg (46.6d, 279.2keV) were used with different...
Dr
Vasiliy Babain
(Khlopin Radium Institute)
20/04/2010, 11:45
New method - extraction ions from solution at apmospheric pressure - analog of well-known ESI-MS method was proposed for analysis of metals in radioactibve solutions. Advantages of this metod to compare with known methods - ( ICP-MS, ICP OES, ESI-MS etc.) - small volume of sample, high sensitivity, possibility of automatization.
Dr
Vladimir Chistyakov
(Russia, Rosatom, JSC"State Scientific Center-Research Institute of Atomic Reactors", Radiochemical Unit)
20/04/2010, 11:45
Technique for determining plutonium total mass fraction in Pu preparations and uranium-plutonium mixtures, including MOX fuel for fast reactors by the automatic coulometric titration is developed and successfully used in RIAR for a long time. The paper presents the optimization results of sample preparation and titration conditions on the facility, developed in RIAR to minimize the total...
Dr
Maria do Carmo Freitas
(Instituto Tecnológico e Nuclear - Reactor)
20/04/2010, 11:45
This work aims to develop methodologies to characterize the composition of the total particulate matter (TPM), collected inside classrooms of three basic schools, in Lisbon, Portugal. The selection of the schools was based on different proximity to city centre: one at downtown, other at the city border and the other at middle distance between both. Quartz and polycarbonate filters are being...
Ms
Marie Kubešová
(Nuclear Physics Institute, Czech Academy of Sciences)
20/04/2010, 11:45
Multipurpose research reactors such as LVR-15 in Řež require frequent monitoring of neutron flux parameters (f, α) when k0 standardization in NAA is to be used. These parameters may change quite unpredictably, because experiments in channels adjacent to those used for NAA frequently require a change of the reactor operation parameters and/or active core configuration. For monitoring of the...
Prof.
Pavol Rajec
(Biont, Faculty of Natural Sciences, Bratislava, Slovakia)
20/04/2010, 11:45
Production and Application of Radionuclides
Poster
Copper has many radionuclides (60Cu, 61Cu, 62Cu, 64Cu, and 67Cu) that can be used in nuclear medicine and molecular imaging. Isotope 64Cu (Iβ+= 17.6 %, Eβ+max=653 keV, Iβ-= 38.5 %, Eβ-max=579.4 keV ) is positron emitters and half life 12.7 hrs and is suitable for the preparation of radiopharmaceuticals for PET imaging. The 64Ni(p,n)64Cu reaction route is popular for its preparation because...
Mr
Marek Fikrle
(Nuclear Physics Institute ASCR)
20/04/2010, 11:45
Production and Application of Radionuclides
Poster
Several procedures of the preparation of the radionuclide 95mTc, a radiotracer useful for vari-ous purposes, were tested. A foil made of natural molybdenum was irradiated with protons or deuterons and after 5-6 weeks of decay the 95mTc radionuclide was separated. Three different separation procedures were tested. 1) Alkaline-oxidative fusion of the Mo target with sodium peroxide and sodium...
Dr
Raquel González de Orduña
(European Comision, Joint Research Centre, Institute for Reference Materials and Measurements)
20/04/2010, 11:45
Three methods for reducing the background, and thus the detection limits for gamma spectrometry using HPGe-detectors are combined here.
1. A passive reduction of the background is achieved by using radiopure materials for the detector and its shield
2. An effective shielding from cosmic rays is achieved in the laboratory, which is located 225 m underground.
3. An active...
Ms
Jixin Qiao
(Radiation Research Division, Risø National Laboratory for Sustainable Energy, Technical University of Denmark, DK-4000 Roskilde, Denmark)
20/04/2010, 11:45
An automated analytical method for the rapid and simultaneous determination of plutonium and neptunium in environmental samples was developed. Extraction chromatographic column packed with Eichrom TEVA® resin was incorporated in a sequential injection (SI) system to automatically separate plutonium and neptunium from matrix elements and interfering radionuclides. Since valence adjustment is a...
Dr
Gospodin Bozhikov
(Flerov Laboratory of Nuclear Reactions, Joint Institute for Nuclear Research), Mr
Nikolay Aksenov
(Flerov Laboratory of Nuclear Reactions, Joint Institute for Nuclear Research)
20/04/2010, 11:45
Production and Application of Radionuclides
Poster
Interest to high-spin (16+) long-lived (31 y) 178m2Hf isomer was established since 20 years ago because of a possibility to produce it in a micro-weight amount for consecutive studies of nuclear reactions with high-spin target and for potential application as an energy accumulator. Production of 178m2Hf was described in [1] via spallation of Ta by protons at LAMP facility and via 176Yb(4He,2n)...
Ms
Tereza Novakova
(Nuclear Physics Institute AS CR, Na Truhlarce 39/64, 180 86 Prague)
20/04/2010, 11:45
During the last decades, 210Pb and its daughter 210Po have become widely used radionuclides for sediment dating. In environmental sediments, the total amount of 210Pb is given by two components: (a) supported 210Pb, produced by radioactive decay of 222Rn inside the material, and (b) an unsupported 210Pb component derived from 222Rn which diffuses into the atmosphere where decays. Subsequently,...
Prof.
Alexandru Cecal
("Al.I. Cuza" University, Faculty of Chemistry)
20/04/2010, 11:45
Saidakhmad Khujaev
(Chief of laboratory)
20/04/2010, 11:45
Production and Application of Radionuclides
Poster
Khujaev S., Markelova E.A., Vasidov A.
Institute of Nuclear Physics, Tashkent, Uzbekistan
The implanted seeds of the Cs-131 are successfully uses in brachytherapy to treat prostate cancer and other malignant tumors. The single x-rays of Cs-131 with 30 keV damages and kills genetic materials of cancer cells, making it impossible for these cells to continue to grow while saving or...
Prof.
Ashraf El-Sayed
(Atomic Energy Authority, Hot lab center, Analytical Chemistry Departments,)
20/04/2010, 11:45
Abstract
A method developed for separation preconcentration and determination of Lanthanum elements which consists of mainly two isotopes, the stable La-139 and the radioactive La-138 with its half life 1.05 E-11 years. The stable isotope La-139 is being the most abundant ratio 99.911±0.001% while La-138 has only 0.089±0.001% abundance ratio. Lanthanum-138 also has two main gamma ray...
Mr
Bojan Štrbac
(Radiation Protection Centre)
20/04/2010, 11:45
A study of coincidence summing of gamma-rays of Co-60 has been presented. In
gamma-ray spectrometry with germanium detectors, the summing effect have to be taken into account at low source detector distance. The peaks due to coincidence summing of X+X, X+gamma,gamma+gamma rays can complicate the spectrum obtained by this type of the detector and signicantly change the counting rate of single...
Ms
Catarina Galinha
(CERENA-IST, Technical University of Lisbon)
20/04/2010, 11:45
An extensive investigation of elemental levels in cereals and their cultivation soils is being carried out across the main production areas of mainland Portugal, with a view to an eventual Se-biofortification of major cultivars (under research contract PTDC/QUI/65618/2006; FCT-MCTES, Portugal). Breads and cereal derivatives (breakfast blends, pastas, etc) make up a sizeable share of the...
Dr
Yoon Yeol Yoon
(Korea Institute of Geoscience and Mineral Resources)
20/04/2010, 11:45
Jeju is a volcanic island located about 90 km south of the Korean peninsula. This area is covered with highly permeable basaltic rocks from the Pliocene through the Quaternary. These rocks are highly permeable and forming the principal aquifers. Therefore, ground water is the sole fresh water resource and provides almost all of the water demand because of the low content of the surface...
Mr
Árpád Bihari
(Nuclear Research Institute, Hungary)
22/04/2010, 03:00
Chemistry of Nuclear Fuel Cycle, Radiochemical Problems in Nuclear Waste Management
Verbal
The low- and intermediate-level liquid wastes produced by the Paks Nuclear Power Plant (NPP) contain routinely measureable gamma-emitting (e.g. Mn-54, Co-60, Ag-110m, and Cs-137) as well as many so-called “difficult-to-measure” isotopes. Despite of their low specific activity compared to the total, the reliable determination of these isotopes is an important issue of nuclear waste management....
Prof.
Karin Popa
("Al.I. Cuza" University, Department of Chemistry)
22/04/2010, 03:00
Chemistry of Actinide and Trans-actinide Elements
Verbal
Data on structure and properties of actinide phosphates are needed for the development of phosphate ceramics envisaged as possible hosts for long-term sequestration of actinides generated by the nuclear fuel cycle. In that aim an extensive study on the crystal structures, thermal stability, and thermodynamic properties on a number of crystalline trivalent and tetravalent actinide phosphates...
Mr
Dag Eriksen
(Primus.inter.pares as)
22/04/2010, 03:15
Chemistry of Nuclear Fuel Cycle, Radiochemical Problems in Nuclear Waste Management
Verbal
After the renaissance of nuclear power and thorium breeding in particular, the interest for the Norwegian thorium deposits has revived. However, the economic potential for exploitation is depending on several parameters, i.e. heterogeneity of ore, content of carbonaceous minerals, other valuable elements present, etc.
Fen is the site where the largest Norwegian thorium deposits are found....
Dr
Astrid Barkleit
(Institute of Radiochemistry, Forschungszentrum Dresden-Rossendorf)
22/04/2010, 03:30
Chemistry of Actinide and Trans-actinide Elements
Verbal
It is well-known that microorganisms play an important role in bioremediation. Because of the high retention capability of heavy metal ions, they significantly influence mobilization and immobilization of cations in soils. The prediction of the radionuclide transport in the environment and the improvement of technical bioremediation strategies require a detailed understanding of the binding...
Dr
Frederic poineau
(UNLV)
22/04/2010, 03:30
Chemistry of Nuclear Fuel Cycle, Radiochemical Problems in Nuclear Waste Management
Verbal
The chemistry of technetium is being explored at the University of Nevada Las Vegas. Our goal is to investigate both the applied and fundamental aspects of technetium chemistry, with a special emphasis on synthesis, separations, and materials science. The synthetic chemistry focuses on metal-metal bonding and binary halides. Recently, two new multiply metal-metal bonded dimers and technetium...
Dr
Henry Moll
(Forschungszentrum Dresden-Rossendorf e.V.)
22/04/2010, 03:45
The aerobic groundwater bacterium Pseudomonas fluorescens (CCUG 32456) isolated from the aquifers at the Äspö Hard Rock Laboratory, Sweden secretes siderophores of the pyoverdin-type. Besides iron(III), these unique bioligands are also able to form strong complexes with actinides (e.g., U(VI), Np(V), and Cm(III)) [1-3]. For U(VI) and Np(V) we could show that mainly the catecholate and to less...
Dr
Zsolt Varga
(EC JRC Institute for Transuranium Elements)
22/04/2010, 03:45
Chemistry of Nuclear Fuel Cycle, Radiochemical Problems in Nuclear Waste Management
Verbal
Natural uranium is the starting material for the production of nuclear fuels. Uranium of natural isotopic composition is mined from uranium containing ores in different geological formations. The uranium is extracted, chemically purified and pre-concentrated. As an industrial scale material, uranium ore concentrates will carry signatures that provide information on the history and on the...
Mr
Artsiom Radkevich
(, Joint Institute for Power and Nuclear Research – Sosny, Belorussian Academy of Sciences, 220109 Мinsk, Belarus)
22/04/2010, 04:00
Separation Methods, Speciation
Verbal
The solubility of the Th(IV)/Fe(III) system has been studied as function of pH in the range 2.00-3.50. In the individual systems of thorium(IV) and iron(III) precipitation takes place due to formation of hydrolysis products. However, in the mixed Th(IV)/Fe(III) system precipitation of ferrihydrite takes place at low pH value, pH = 2.00, whereas at higher pH no precipitation was observed after...
Mr
Zoltán Köllő
(MTA ATOMKI)
22/04/2010, 04:00
Radionuclides in the Environment, Radioecology
Verbal
Tritium in the environment has natural and artificial sources. The formers are the nuclear reactions in the upper troposphere and the lower stratosphere, the latter are the various nuclear facilities (fission and fusion reactors, etc.). In order to investigate the two phenomena separately it is necessary to know the effect of artificial tritium emitters to their surroundings with respect to...
Mr
Sergey Kiselev
(Burnasyan Federal Medical Biophysical Center, Moscow, Russia)
22/04/2010, 04:15
Radionuclides in the Environment, Radioecology
Verbal
In the light of the operation life termination of the Navy nuclear submarines and their technical service vessels, and because of international obligations of the Russian Federation to reduce armaments, the intensive decommissioning has started since the latter 1980-s. The decommissioning rate was higher than these submarine dismantlement rate determined by the available abilities of the...
Mr
Jan Bárta
(CTU in Prague)
22/04/2010, 05:00
Radiation method of copper and cuprous oxide preparation produces material of high chemical purity and catalytic activity. Reduction of metal ions in aqueous solutions via UV, γ irradiation or accelerated electrons results in formation of nanosized particles of both Cu/Cu2O with uniform spherical shapes at normal temperature. This method of preparation is very simple and relatively...
Mr
OLANREWAJU ANJOLAIYA
(LOUGHBOROUGH UNIVERSITY)
22/04/2010, 05:00
Radionuclides in the Environment, Radioecology
Verbal
The aim of this study is to use predictive modelling to understand and calculate the sorption behaviour of radionuclide contaminants in complex environments such as clay-based soils. The effects of Natural Organic Matter (NOM) on the Cation Exchange Capacities (CEC) of different characterised clay soils (St Bees & Mercia Mudstones, Boom clay & London clay) and their constituent clay minerals...
Ms
Bianca Raditzky
(Forschungszentrum Dresden-Rossendorf, Institute of Radiochemitry)
22/04/2010, 05:15
Radionuclides in the Environment, Radioecology
Verbal
The long-term safety assessment of nuclear waste disposals requires detailed knowledge of the transport and interaction behavior of actinides within the technical, geotechnical and geological barriers. In the case of accidental release of radionuclides into the surrounding environment, their migration behavior can be effectively influenced by the ambient conditions like pH, temperature, ionic...
Dr
Valeriy Luchnikov
(Institut de Science des Matériaux de Mulhouse CNRS)
22/04/2010, 05:15
We consider theoretically the possibility of programming the ageing processes in materials via the introduction of small quantities of unstable nuclei in a material’s structure. Ageing of materials is usually considered as a harmful and undesirable process, which limits the lifetime of many consumer products. In certain instances, however, changing of physico-chemical properties with time...
Irena Špendlíková
(KJCH FJFI CVUT)
22/04/2010, 05:30
This study deals with the effects of irradiation on the stability and extraction properties of thiacalixarenes 1, the prospective liquid-liquid extractants for the extraction of actinides and lanthanides from aqueous solutions. Thiacalixarenes dissolved in various organic diluents were irradiated with 60Co γ rays or accelerated electrons with energy of 4.5 MeV. The...
Mrs
Olga Zhukova
(Institute of global climate and ecology)
22/04/2010, 05:30
Radionuclides in the Environment, Radioecology
Verbal
Peculiarity of vertical migration of Cs-137 was investigated in zones of Chernobyl contamination (Bryanskaya, Orlovskaya, Tulskaya and Kaluzhskaya districts). Vertical distribution of Cs-137 on inviolate places characterizing by minimal penetration of peak of maximal concentration for the depth about 2-4 cm in dependence of type of soil and intensity of processes of byoturbation....
Dr
Martin Cabalka
(NRI Rez, plc)
22/04/2010, 05:45
The accelerated radiation and thermal ageing of cables has a special importance in the type qualification test of NPP cables as it should provide for the cable ageing by an accelerated but real process of ageing, i.e., by the homogeneous oxidation of the cable polymeric materials. A comparison of three cable ageing techniques was performed on the representative NPP cables based on EVA and...
Dr
Harald Foerstendorf
(Forschungszentrum Dresden-Rossendorf, Institute of Radiochemistry)
22/04/2010, 05:45
Radionuclides in the Environment, Radioecology
Verbal
The migration behaviour of actinide ions in the geosphere is generally influenced by sorption processes in aqueous media. These processes occurring at solid/liquid interfaces can be monitored by in situ Attenuated Total Reflection Fourier-transform Infrared (ATR FT-IR) spectroscopy providing structural information on a molecular level.[1]
In this work, the sorption of neptunium(V) onto metal...
Ms
Tereza Pavelková
(CTU in Prague, ČVUT jiný pracovní poměr)
22/04/2010, 06:00
Catalytic activity of catalase from bovine liver was studied using experimental device designed for kinetic measurements of hydrogen peroxide decomposition at constant temperature and pressure. The kinetics of the reaction was evaluated by measuring the volume of released oxygen. The measurement was performed at four temperatures in the range of 25 – 45 °C. Rate constants of the reaction were...
Mr
Marko Černe
(Jožef Stefan Institute)
22/04/2010, 06:00
Radionuclides in the Environment, Radioecology
Verbal
ABSTRACT
Transfer of radionuclides into the environment is a common phenomenon and due to its potential harmful effect of particular scientific interest in the vicinity of uranium mines. Radionuclides, especially uranium and thorium decay products are discharged with U-mill tailings into the soil and water and consequently into vegetation where they accumulate. Radionuclide soil-to...
Mr
Pavel Bláha
(CTU in Prague, ČVUT jiný pracovní poměr)
22/04/2010, 06:15
Relatively high attention is paid to various agents (e.g. chemical substances [1], hyperthermia and/or radiation [2,3]) influencing the growth of microorganisms. The influence of radiation on the microbial cells may be indicated not only by the survival curves, but also by the growth curves of irradiated and non-irradiated cultures.
The aim of the study is to point out to some aspects of the...
Dr
Štefan Palágyi
(Nuclear Research Institute Řež plc)
22/04/2010, 06:15
Radionuclides in the Environment, Radioecology
Verbal
Transport of 125I-, 137Cs+ and 85Sr2+ radionuclides in crushed granitoidic rocks and homogenized soil was studied. Two simple methods for calculation of transport parameters of these radionuclides in flow column experiments with groundwater (GW) as transport medium have been described. The first method is based on the assumption...
Dr
Alexander Popkov
(Department of Information Systems, Faculty of Health and Social Studies, University of South Bohemia)
22/04/2010, 08:00
Nuclear Methods in Medicine, Radiopharmaceuticals and Radiodiagnostics, Labelled Compounds
Verbal
PET diagnostics using radiolabelled amino acids is an emerging branch of nuclear medicine. This includes visualisation and grading of brain, neuroendocrine and prostata tumours, measurement of protein synthesis rate in tumour cells, quantitative in vivo measurement of dopamine and serotonin metabolism in brain. Development of clinical applications is limited by complexicity of robotic devices...
Dr
Teodora Retegan
(Chalmers University of Technology)
22/04/2010, 08:00
Fossil fuels are no longer a choice for energy production, both because of their diminishing availability and the bi-products of their combustion processes. A possibility to replace the fossil fuels would be utilization of nuclear power. No green-house gases are produced, but as any industry, it generates wastes.
A proper plan for reusing valuable nuclides, both by preparing another kind of...
Mr
Mohamed Shehata
(Institut für Neurowissenschaften und Medizin, INM-5: Nuklearchemie, Forschungszentrum Jülich GmbH, D-52425 Jülich, Germany)
22/04/2010, 08:15
Solvent extraction techniques were developed to separate As-72 from bulk amounts of proton-irradiated germanium dioxide targets, Ge-68 from proton-irradiated gallium(III) oxide targets and Ga-68 from parent Ge-68.
Several methods have been reported to isolate arsenic radionuclides from irradiated Ge and germanium dioxide targets [1,2]. In this work the germanium dioxide target, irradiated...
Ms
Olga Mokhodoeva
(Vernadsky Institute of Geochemistry and Analytical Chemistry of Russian Academy of Sciences)
22/04/2010, 08:30
Preconcentration of radionuclides is a necessary stage for their accurate determination in aqueous natural and technological solutions. Sorption methods are the most perspective for selective recovery and separation of radionuclides from other elements. Various sorption materials containing complexing groups have been widely applied due to their selectivity and high degree of recovery. It is...
Mr
Ken Kersemans
(Vrije universiteit Brussel)
22/04/2010, 08:30
Nuclear Methods in Medicine, Radiopharmaceuticals and Radiodiagnostics, Labelled Compounds
Verbal
It was recently reported that the success of O-(2’-[18F]fluoroethyl)-L-tyrosine ([18F]FET) as PET tracer is limited to brain, head and neck tumours and that there is still a need for more potent amino acid analogues for peripheral tumour imaging. We hereby report on the radiosynthesis of a new tracer 2-Amino-3-(4-[18F]fluoromethyl-phenyl)-propionic acid (4-[18F]FMP), taken up in tumours by the...
Mrs
Věra Jedináková-Křížová
(Institute of Chemical Technology)
22/04/2010, 08:45
The contribution is focused on geotechnical, chemical, geochemical and mineralogical research of bentonite stability with the aim to determine the effect of saturation medium composition and loading by heat on bentonite stability. The main part the research is directed to the experimental results of bentonite and bentonite leachate samples obtained for the bentonite interaction under...
Mr
Martin Vlk
(Department of Nuclear Chemistry, Faculty of Nuclear Sciences and Physical Engineering, CTU Prague)
22/04/2010, 08:45
Nuclear Methods in Medicine, Radiopharmaceuticals and Radiodiagnostics, Labelled Compounds
Verbal
The lupane type compounds have played a singular role among pentacyclic cytotoxic triterpenoids from the beginning of 21st century, mainly for their various biological activities1, which include antineoplastic, antiviral, anti-inflammatory, antimicrobial activities and also hepato- and cardioprotective effects. The derivatives of betulin and betulinic acid have been...
Mr
Ján Kozempel
(European Commission, IHCP - JRC, Ispra)
22/04/2010, 09:00
Nuclear Methods in Medicine, Radiopharmaceuticals and Radiodiagnostics, Labelled Compounds
Verbal
Engineered nanoparticles are of current interest in many applications (e.g. industry, medicine, energy). As they are produced in ever higher quantities, the need to assess their biokinetics and toxicity becomes more and more important. The aim of this study was to prepare stable, radiolabelled bioavailable TiO2 nanoparticles to assess their in vivo biokinetics. The preparation of...
Ms
Anne Heller
(Forschungszentrum Dresden-Rossendorf, Institute of Radiochemistry)
22/04/2010, 09:00
Due to their radiation and heavy metal properties, radionuclides represent a serious health risk to humans in case of incorporation. To understand their toxicity, transport, deposition and elimination in the human organism, it is therefore crucial to elucidate their chemical behavior and properties on a molecular level. For trivalent actinides originating from nuclear power plants knowledge...
Mr
Szabolcs Osvath
(BME NTI (Budapest University of Technology and Economics, Institute of Nuclear Techniques))
22/04/2010, 09:15
The majority of long-lived radionuclides produced in the nuclear fuel cycle can be regarded as “difficult to determine nuclides” due to the low activities and/or the absence of gamma-radiations of medium or high energies in the decay schemes. Most isotopes of actinoides are alpha-emitters, Sr-90 (fission product) and Zr-93 (activation product) emit almost exclusively beta-particles, Nb-93m...
Dr
Jan Rijn Zeevaart
(Radiochemistry, Necsa)
22/04/2010, 10:00
Nuclear Methods in Medicine, Radiopharmaceuticals and Radiodiagnostics, Labelled Compounds
Verbal
The use of radionuclides as potential therapeutic radiopharmaceuticals is increasingly investigated. An important aspect is the delivery of the radionuclide to the target, i.e. the radionuclide is not lost from the chelating agent. For in vivo generators it is not only the log K of complexation between the metal ion and the chelator that is important but whether the daughter radionuclide stays...
Dr
Stanislav Pavelka
(Dept. of Radiometry, Inst. of Physiolgy, ASCR Prague; and Inst. of Biochemistry, Masaryk Univ. Brno, Czech Rep.)
22/04/2010, 10:30
Nuclear Methods in Medicine, Radiopharmaceuticals and Radiodiagnostics, Labelled Compounds
Verbal
Radiometric enzyme assays are based on the conversion of radio-labeled substrates to labeled products, and on the measurement of radioactivity of either products or residual substrate after their quantitative separation. In the present studies, we aimed to establish valid assay conditions for radiometric determination of the activities of several enzymes, which are involved in the metabolism...
Prof.
Ladislav Lešetický
(Faculty of Science, Charles University)
22/04/2010, 10:45
Nuclear Methods in Medicine, Radiopharmaceuticals and Radiodiagnostics, Labelled Compounds
Verbal
The synthesis, labeling and careful spectroscopic investigation of meta-iodo-benzyl guanidin has been performed. As result of ESI MS and single crystal X-ray diffraction the corect structure is meta-iodo-benzyl guanidine hemisulfate hemihydrate (2 MIBG. H2SO4.H2O).
Mr
Branko Vodenik
(Jožef Stefan Institute, Ljubljana, Slovenia)
22/04/2010, 11:00
In gamma-ray spectrometry the activities are calculated from areas of the peaks appearing in the spectrum. If a peak used in the activity calculations appears in the spectrometer background its count rate must be corrected for the background contribution. The significance of this correction becomes essential in spectral analyzes where activities close to the minimum detectable activity need to...
Dr
Rozle Jakopic
(Institute for Reference Materials and Measurements (IRMM), JRC, European Commission)
22/04/2010, 11:15
The measurement of amounts of plutonium is recognised as one of the most important tasks in fissile material control. Public opinion is especially sensitive to this element, which presents analysts with a difficult task of measuring plutonium at all levels from large (multi-gram) amounts down to traces in the environment.
The Institute for Reference Materials and Measurements (IRMM) is one of...
Dr
Stanislav Pavelka
(Dept. of Radiometry, Inst. of Physiolgy, ASCR Prague; and Inst. of Biochemistry, Masaryk Univ. Brno, Czech Rep.)
22/04/2010, 12:00
Nuclear Methods in Medicine, Radiopharmaceuticals and Radiodiagnostics, Labelled Compounds
Poster
With the use of adapted radiometric enzyme assays for iodothyronine sulfotransferases (ST) and uridine 5’-diphospho-glucuronyltransferase (UDPGT), as well as of our newly developed radiometric assays for iodothyronine deiodinases (IDs) of types 1, 2 and 3 (D1, D2 and D3), we studied the interaction of an antidepressant drug fluoxetine with the metabolism of thyroid hormones (TH) in the rat. TH...
Dr
Maria Angela Menezes
(Nuclear Technology Development Centre / Brazilian Commission for Nuclear Energy, Division for Reactor and Analytical Techniques, Belo Horizonte, Brazil)
22/04/2010, 12:00
Lichen, or lichenized fungi, is one of the most efficient on air pollution biomonitoring among the biomonitors. Biomonitoring has been used as an alternative method to study the air pollution in several countries, however, in Brazil, systematic use of lichens as biomonitors of environmental pollution is quite rare. In order to make an assessment of the air quality of the Mangabeiras’ Park,...
Mr
Jan Krmela
(KJCH FJFI CVUT)
22/04/2010, 12:00
Europium is often used as a model of the fission products from the lanthanides and minor actinides group. Glycolic acid is used in modern decontamination solutions and has been also proposed as a complexing agent in the reprocessing of spent nuclear fuel.
The aim of this study was to carry out a more detailed study of europium complexation with glycolic acid using Time-Resolved Laser-Induced...
Dr
Zeljko Grahek
(Rudjer Boskovic Institute)
22/04/2010, 12:00
55Fe is an activation product, low energetic beta emitter with approximately 2,74 year half life. Therefore, its presence in natural systems is limited in time and mainly dependent on nuclear reactor operation. As a rule determination of 55Fe require chemical separation prior detection. For this purposes separation on anion exchange column in two steps is usually used which makes it...
Mr
Bahrom Yarmatov
(Institute Nuclear Physics of academy of sciences of Uzbekistan)
22/04/2010, 12:00
Nuclear Methods in Medicine, Radiopharmaceuticals and Radiodiagnostics, Labelled Compounds
Poster
For labeling of pharmacological preparation of isoniazide we have used the method of labeling by thermally activated tritium. Isoniazide was labeled by thermally activated tritium in apparatus for tritium labeling. The influence of procedure of labeling on isoniazide has been investigated. During of labeling the change of color of isoniazide was observed that indicates partial destruction of...
Mr
Jakhongir Dadakhonov
(Institute Nuclear Physics of academy of sciences of Uzbekistan)
22/04/2010, 12:00
Nuclear Methods in Medicine, Radiopharmaceuticals and Radiodiagnostics, Labelled Compounds
Poster
For labeling of pharmacological preparations of furosemide and drotaverine we used the method of labeling by thermally activated tritium. Furosemide and drotaverine were labeled by thermally activated tritium in apparatus for tritium labeling. The optimum regime of labeling was selected. The systems of purification of tritium-labeled furosemide and drotaverine by thin layer chromatography...
Mrs
Teija Koivula
(M.Sc., researcher)
22/04/2010, 12:00
Nuclear Methods in Medicine, Radiopharmaceuticals and Radiodiagnostics, Labelled Compounds
Poster
The crude reaction mixture consisted of p-[18F]MPPF and 2-4 labelled impurities eluting after the product fraction, and the reverse-phase HPLC method reported in the literature [1] failed sometimes to separate p-[18F]MPPF from its radioactive by-product with close retention time. Analytical HPLC was based on similar chromatographic conditions. By comparing it to...
Ms
Barbora Drtinova
(CTU Prague)
22/04/2010, 12:00
The radiation removal of cadmium(II) from aqueous solutions in presence of different scavengers has been investigated. 100 mg/L of cadmium dissolved from Cd(NO3)2 requires dose of 15 kGy to be effectively removed from the system containing 1×10-2 mol/L of HCOOK as a scavenger of OH radicals. The positive effect of deaeration with N2O or N2 was...
Dr
Alicia Negron-Mendoza
(Instituto de Ciencias Nucleares, UNAM)
22/04/2010, 12:00
In this work, is analyzed the interactions of the γ-radiation with two alkali halide single crystals: NaCl doped with Ca2+ (0.3 %) or Mn2+ (0.3 %), at two irradiation temperatures (298 K and 77 K), and different doses at a fix dose rate, for their possible use as dosimeters. The irradiated crystals were analyzed using their thermoluminescence properties. The...
Dr
Maria Angela Menezes
(Nuclear Technology Development Centre / Brazilian Commission for Nuclear Energy, Division for Reactor and Analytical Techniques, Belo Horizonte, Brazil)
22/04/2010, 12:00
The Portuguese settlers arrived in the coast of the Brazilian State of Espírito Santo in sixteenth century and built several “Missões Jesuíticas” (Jesuitical Missions). In spite of living within the Mission and been catechized, the Indians, Tupiguarani Tradition, kept on producing traditional handcraft, as the decorated ceramic, however, they introduced European elements during the production...
Dr
Dennis Wester
(MDS Nordion)
22/04/2010, 12:00
Nuclear Methods in Medicine, Radiopharmaceuticals and Radiodiagnostics, Labelled Compounds
Poster
Both 67Ga (t1/2 3.26 d) and 68Ga (t1/2 68 min) are radioisotopes with appropriate emissions for nuclear imaging. 68Ga is of particular interest due to its potential availability from a 68Ge/68Ga generator. The short half-life of 68Ga requires the use of targeting vectors with fast localization such as small...
Dr
Andrea Sabatié-Gogova
(Laboratoire Subatech (CNRS/IN2P3 / Ecole des Mines de Nantes / Université de Nantes))
22/04/2010, 12:00
Astatine (At, Z=85: [Xe]4f145d106s26p5) is below iodine and belongs to the halogen group. One of its isotopes, 211At, is a promising candidate as a therapeutic agent in nuclear medicine [1].
It has been reported that astatine presents a metal-like behavior when existing under the oxidation states +I and +III as At+ and AtO+ species [2]. However, the number of studies dealing with the...
Mr
Viktor Jobbàgy
(Joint Research Centre-IRMM)
22/04/2010, 12:00
Radionuclides in the Environment, Radioecology
Poster
In the last few decades, increasing attention is paid to restrict exposure of the public to the naturally occurring radiation. The WHO (WHO, 2004) and the EU Council (EC, 1998; EC, 2010-in preparation) have determined the reference level of the effective dose received from drinking water consumption at 100 μSv y-1. This value excludes the dose received from 3H,...
Mr
Ota FIŠERA
(VOP-026 Šternberk, s. p., division VTÚO Brno)
22/04/2010, 12:00
The aim of this study was suggestion and examination of method for radioanalytical determination of 59-Ni in radioactive wastes using low energy photon spectrometry (LEPS). New composite material PAN-DMG, containing chelating agent dimethylglyoxime (DMG) immobilized in porous matrix of binding polymer polyacrylonitrile, was used for nickel separation and concentration. Method for preparation...
Dr
Štefan Palágyi
(Nuclear Research Institute Řež plc)
22/04/2010, 12:00
Chemistry of Nuclear Fuel Cycle, Radiochemical Problems in Nuclear Waste Management
Poster
In the framework of the development of remediation scenario of underground areas affected by chemical mining of uranium in the locality of Stráž pod Ralskem a complex geochemical and transport model is generated, which comprises interaction of rocks and groundwater affected by acid leaching. The chemical remediation processes also require the knowledge of the properties of the affected rocks....
Dr
Mihály Molnár
(MTA ATOMKI)
22/04/2010, 12:00
Chemistry of Nuclear Fuel Cycle, Radiochemical Problems in Nuclear Waste Management
Poster
The aim of this work was the investigation of the effect of nuclear fuel rods to the composition of the dissolved gas in the cooling water of the cooling ponds of Paks Nuclear Power Plant (Paks NPP).
In normal cases after three-year usage in the reactor the spent fuel elements are stored in cooling ponds for years before delivering out from the reactor area. In April of 2003 with the failure...
Mr
Martin Straka
(Nuclear Research Institute Řež, plc)
22/04/2010, 12:00
Chemistry of Nuclear Fuel Cycle, Radiochemical Problems in Nuclear Waste Management
Poster
The presented work is focused on research of basic electrochemical properties of several actinides and lanthanides representing the fissile material and fission products in suitable molten fluoride melt. The general framework of this work is to study the electrochemical behaviour of systems relevant for possible future use in the Generation IV reactor concepts.
Results of cyclic...
Mr
Jiří Janda
(NBC Defence Institute, University of Defence)
22/04/2010, 12:00
This method describes electrodeposition of selected group of alpha-emitting radionuclides such as method suitable for measuring by means of solid-state alpha spectrometry. The effect of volume and pH of electrolyte, distance of electrodes, current and plating time versus different alpha-emitting radionuclides was observed in order to optimize conditions to obtain maximum yield.
Dr
Matteo Mazzuccato
(European Commission, Joint Research Centre, Ispra Site Directorate, Italy)
22/04/2010, 12:00
Chemistry of Nuclear Fuel Cycle, Radiochemical Problems in Nuclear Waste Management
Poster
A future goal for the reprocessing of spent nuclear fuel is the transmutation of long-lived minor actinides, such as americium and curium, into short-lived isotopes by means of neutron irradiation. In order to develope an effective transmutation process, it is necessary to separate the trivalent minor actinides, An(III), from the trivalent lanthanides, Ln(III) by means of two subsequent...
Dr
P.N. PATHAK
(BARC, MUMBAI, INDIA)
22/04/2010, 12:00
Chemistry of Nuclear Fuel Cycle, Radiochemical Problems in Nuclear Waste Management
Poster
Tributyl phosphate (TBP) has been the work horse of Nuclear Fuel Reprocessing Technologists for more than five decades. However, based on five decades of experience on spent fuel reprocessing, certain problems have also been identified with the use of TBP as extractant. Prominent amongst them are: (a) high aqueous solubility, (b) poor radiation stability and interference of degradation...
David Dobrev
(Nuclear Research Institute Rez)
22/04/2010, 12:00
Chemistry of Nuclear Fuel Cycle, Radiochemical Problems in Nuclear Waste Management
Poster
The knowledge of chemical conditions, especially of redox potential, inside waste packages with radioactive wastes is important for determination of radionuclides speciation and their leaching rate after failure of waste packages. Conditions inside waste packages will be determined primarily by the reactions of thermodynamically unstable iron with groundwater penetrating into waste packages...
Mr
Pavel Selucký
(Ústav jaderného výzkumu Řež)
22/04/2010, 12:00
Chemistry of Nuclear Fuel Cycle, Radiochemical Problems in Nuclear Waste Management
Poster
Abstract
The nuclear fuel reprocessing isues an important problem in respect to handling of the family of actinides which represent the main source of radiotoxity during long-term storage. The separation of long lived radionuclides from liquid radioactive waste enables these hazardous elements to be either conditioned more safely in specific matrices, or destroyed by transmutation. Thus,...
Mr
Nikolai Khlebnikov
(Institute of Solid State chemistry, Ural Branch Russian Academy of Sciences)
22/04/2010, 12:00
Radionuclides in the Environment, Radioecology
Poster
Knowledge of the speciation and partitioning of radionuclides and their natural analogs in nature water have great radioecological significance for all environmental systems and Ural region in particular. Distribution of interesting elements in geochemical fractions in water solutions is one of more important point for understanding and modeling mechanism of radionuclide migration in nature...
Prof.
Valentin Avramenko
(Institute of Chemistry FEBRAS)
22/04/2010, 12:00
Chemistry of Nuclear Fuel Cycle, Radiochemical Problems in Nuclear Waste Management
Poster
Here we discuss preparation of a new type of colloid-stable nanosized sorbents based on functionalized latex particles, which can be directly applied for decontamination of liquid and solid radioactive wastes or used for construction of fibrous or mesoporous composite sorption materials. Carboxylic latex (siloxane-acrylate and polystyrene-acrylate) functionalization is performed via...
Prof.
Juan F. Facetti-Masulli
(Hydroconsult , Asuncion Paraguay)
22/04/2010, 12:00
Minor and trace elements composition of bottom sediments from water bodies in Western Paraguay have been investigated by XRF techniques to determine their correlation as well as provenance. The analysis of complex spectra was performed by the AXIL software and the quantitative analysis by the QAES software. Analysed trace elements were refractories Rb, Ba, Nb, La, Ce, Sr, Nd, Zr, Y and other...
134.
Immobilisation of cesium and divalent metals into single-phase stuffed tridymite-based ceramics
Mr
Andrey Zaripov
(FSUE Mayak PA, Ozyorsk, Russia)
22/04/2010, 12:00
Chemistry of Nuclear Fuel Cycle, Radiochemical Problems in Nuclear Waste Management
Poster
The mixed phosphates with high caesium concentration of the compositions CsMePO4 (Me − divalent metal with a tetrahedral coordination) adopting a stuffed β-SiO2 tridymite structure are studied as perspective materials for a 137Cs γ-radiation sources to be used in medic applications. For the purpose of 137Cs source production from commercial radiocaesium liquid wastes (nitrate caesium solutions...
petr polivka
(czech chemical society)
22/04/2010, 12:00
Chemistry of Nuclear Fuel Cycle, Radiochemical Problems in Nuclear Waste Management
Poster
A large number of processes will influence performance of deep geological repository of radioactive wastes until the activity of radionuclides decay to a negligible level. One of the very important processes is generation of gases, and particularly of hydrogen, which will be formed primarily by anaerobic corrosion of metals and by radiolysis of water. High pressure formed in the vicinity of...
Dr
Olga Shmidt
(Khlopin Radium Institute RPA)
22/04/2010, 12:00
Chemistry of Nuclear Fuel Cycle, Radiochemical Problems in Nuclear Waste Management
Poster
Cementation provided by mixing of concentrated radioactive waste (RAW) and cement is the most common procedure for immobilization of medium- and low-level radioactive salt-containing waste of radiochemical industry. However, low degree of inclusion of solidified waste in concrete (especially from concentrated salt-containing solutions owing to deterioration of the concrete properties) and...
Dr
Maria Chernysheva
(Lomonosov Moscow State University)
22/04/2010, 12:00
Nuclear Methods in Medicine, Radiopharmaceuticals and Radiodiagnostics, Labelled Compounds
Poster
The behavior of biological active compounds in aqueous/oil systems is usually used as a model of their interaction with the lipid membrane of the cells. Thus, study of the processes proceeding in the system of two immiscible liquids is a central question of the research. In this work we propose to use tritium labeled bioactive compounds and scintillation phase method [1] for studying...
Ms
Jixin Qiao
(Radiation Research Division, Risø National Laboratory for Sustainable Energy, Technical University of Denmark, DK-4000 Roskilde, Denmark)
22/04/2010, 12:00
Fractionation of plutonium isotopes (238Pu, 239,240Pu) was conducted for environmental samples including soil and sediment, and bio-shielding concrete from decommissioning of nuclear reactor in this work. The fractionation were carried out by dynamically sequential extraction system using an on-line sequential injection (SI) combined with a specially designed extraction...
Dr
ANA PANTELICA
(Horia Hulubei National Institute for Physics and Nuclear Engineering (IFIN-HH))
22/04/2010, 12:00
Radionuclides in the Environment, Radioecology
Poster
This paper presents the radioactivity levels of 137Cs man-made and naturally occurring radionuclides (40K, 235U, 238U-decay series, and 232Th-decay series) in Romanian soils from several industrial sites, determined by low background gamma- ray spectrometry.
Agricultural soil samples were collected from the vicinity of the phosphate fertilizer plant at Turnu Magurele, as well as from...
Kamila Šťastná
(CTU in Prague, FNSPE, centrum pro radiochemii a radiační chemii;FJFI katedra jade)
22/04/2010, 12:00
Because of the energy loss of alpha particles by self-absorption, alpha spectrometry requires thin, uniform, and nearly weightless samples. Several methods exist for sample preparation e.g., electrodeposition, or co-precipitation. Unfortunately, the methods yielding the best energy resolution are not always quantitative and are usually relatively demanding and time-consuming. This fact makes...
Dr
Martin Kropacek
(Nuclear Physics Institute of the ASCR, 25068 Rez by Prague, Czech Republic)
22/04/2010, 12:00
Nuclear Methods in Medicine, Radiopharmaceuticals and Radiodiagnostics, Labelled Compounds
Poster
Lutetium-177 is a radionuclide used in nuclear medicine for therapeutic application. Both β and γ radiations emitted from 177Lu allow imaging of the therapeutic radionuclide without need of adding any other radionuclide. It can be prepared in the nuclear reactor via direct (n, γ) activation from enriched lutetium target or via indirect neutron activation from ytterbium oxide. In...
Prof.
Viacheslav Radchenko
(JSC "State Scientific Center - Research Institute of Atomic Reactors")
22/04/2010, 12:00
Chemistry of Nuclear Fuel Cycle, Radiochemical Problems in Nuclear Waste Management
Poster
Long-lived nuclide 99Tc is accumulated as a fission product in 1-3 kg/t quantities in fuel of nuclear power plants. Transmutation of technetium by the action of neutrons is the most cardinal method for its neutralization and disposal; this leads to the production of artificial stable 100Ru, 101Ru. Several technetium targets have been irradiated at SSC RIAR. Metal technetium in the form of...
Prof.
Dr.Mr.ASHRAF ELSAYED MOHAMED MOHAMED
(World Institute of nuclear secuirity"Austria')
22/04/2010, 12:00
Chemistry of Nuclear Fuel Cycle, Radiochemical Problems in Nuclear Waste Management
Poster
Pyrochemical separations , involving molten salt and metal media , by liquid/liquid extraction or electrorefining are studies for nuclear defense and civil applications. The electrochemical properties of plutonium have been studied in molten salt-ternary eutectic mixture NaCI-KCI-BaCI2, equimolar mixture NACI-KCI and pure CaCI2 - and in liquid gallium at 1073 k. These processes concern...
Mr
Tamás Nagy
(Isotoptech Co. Ltd., Debrecen, Hungary)
22/04/2010, 12:00
Chemistry of Nuclear Fuel Cycle, Radiochemical Problems in Nuclear Waste Management
Poster
In the Püspökszilágy Radioactive Waste Treatment and Disposal Facility, Hungary being in operation since 1976 many works began to solve the storage of the non-power plant radioactive waste of Hungary to fulfil the increasing safety demands. In the framework of this procedure the exhumation of 66 pieces of reinforced concrete near-surface vaults with the size of 70-140 m3 each (called vault...
Prof.
Cristiana Oprea
(JINR)
22/04/2010, 12:00
The concentrations of some trace and essential element constituents in nine medicinal plants surveyed in Bucegi Mountains in Romania, namely Achillea millefolium, Chelidonium majus, Cynara scolymus, Hypericum perforatum, Tilia cordata, Matricaria recutita, Mentha, Rosa canina and Urtica, were determined. The above medicinal plant species were used for the experiments as they are an important...
Dr
Andrey Lizin
(Radioсhemical Association, Joint Stock Company “State Scientific Center Research Institute of Atomic Reactors (JSC “SSC RIAR), Dimitrovgrad-10, Ulyanovsk region, 433510, Russia)
22/04/2010, 12:00
In order to isolate long-lived radionuclides from the environment it is necessary to immobilize them into highly stable forms (matrices). Crystalline materials of the mineral-like type are considered to be the most promising form of the matrix incorporating high-level waste (HLW). Alpha particles and heavy recoil nuclei lead to the damage of actinide-containing crystalline phase structures of...
Dr
Alicia Negron-Mendoza
(Instituto de Ciencias Nucleares, UNAM)
22/04/2010, 12:00
Studies in radiation chemistry can provide a deeper insight into the chemical process that may have importance for chemical evolution studies that led to the origin of life. Chemical evolution encompasses the physical and chemical aspects that try to explain the origin/permanence of bio-organic compounds prior the appearance of life.
Our aim is to stress the relevance of ionizing radiation as...
Mr
Petr Kovařík
(Nuclear Research Institute Rez plc.)
22/04/2010, 12:00
Chemistry of Nuclear Fuel Cycle, Radiochemical Problems in Nuclear Waste Management
Poster
A molten salt oxidation (MSO) process is being studied for the safe and
effective destruction of organic components of radioactive waste. The
work involves a laboratory-scale molten salt oxidation system where solid
or liquid waste is injected into a bed of molten carbonate salt in the
presence of an oxidizing gas. The relatively simple MSO process
completely destroys organic compounds,...
Dr
Viktor Jobbàgy
(Joint Research Centre-IRMM)
22/04/2010, 12:00
Radionuclides in the Environment, Radioecology
Poster
As many other countries in the Central European region, (e.g. Czech Republic, Slovakia, Romania) Hungary is rich in spring-, thermal-, and mineral waters as well. Recently the consumption of natural mineral- and spring waters comes to be more and more popular in a certain populations. It is well known some of these waters have elevated level of dissolved naturally origin radionuclides, but...
Dr
Vladimir Seregin
(Burnasyan Federal Medical Biophysical Centre)
22/04/2010, 12:00
Radionuclides in the Environment, Radioecology
Poster
Abstract
Remediation of sites and facilities belonging to the sites of temporary storage (STS) of spent nuclear fuel (SNF) and radioactive wastes (RW) at Andreeva Bay and Gremikha village on the Kola Peninsula is one of the regulatory functions of radiation protection. After termination of operation of the ex-Navy serviced facilities, their infrastructure degraded resulting in radioactive...
Prof.
Viacheslav Radchenko
(JSC "State Scientific Center - Research Institute of Atomic Reactors")
22/04/2010, 12:00
Considered are changes in the elementary cell volumes versus time at room temperature and annealing behavior of some curium intermetallic compounds with platinum metals (Pt, Ir, Rh and Pd) etc. caused by internal irradiation by alpha-decay products of radioactive component [1,2,3].
The intermetallide x-rays show that with increasing irradiation dose a decrease in the diffraction reflection...
Ms
Veronika Kleinova
(Nuclear Physics Institute of the ASCR, 250 68 Rez by Prague, Czech Republic)
22/04/2010, 12:00
Nuclear Methods in Medicine, Radiopharmaceuticals and Radiodiagnostics, Labelled Compounds
Poster
The ability of the monoclonal antibody TU-20 and its scFv fragment to bind specifically to the C-end of the class III β-tubulin makes these substances useful as potential diagnostics for neurodegenerative diseases – especially peripheral neuropathies.
TU-20 and its scFv were labeled with 125I and 123I by chloramine-T (with average yield 0.75 and 0.50, respectively). Radiochemical purity...
Dr
Stanislav Pavelka
(Dept. of Radiometry, Inst. of Physiolgy, ASCR Prague; and Inst. of Biochemistry, Masaryk Univ. Brno, Czech Rep.)
22/04/2010, 12:00
Nuclear Methods in Medicine, Radiopharmaceuticals and Radiodiagnostics, Labelled Compounds
Poster
We elaborated novel, reliable methods for extremely sensitive radiometric determination of enzyme activities of iodothyronine deiodinases (IDs) of types 1, 2 and 3 in microsomal fractions of different rat and human tissues, as well as in homogenates of cultured mammalian cells. These enzymes catalyze selective 5’- (outer ring) and 5- (inner ring) monodeiodinations of iodothyronines and play...
Ms
Supaporn Sawadjoon
(National Cyclotron and PET Centre, Chulabhorn Cancer Centre, Vipavadee-Rangsit Highway, Laksi, Bangkok 10210, Thailand)
22/04/2010, 12:00
Nuclear Methods in Medicine, Radiopharmaceuticals and Radiodiagnostics, Labelled Compounds
Poster
6-[18F]Fluoro-3,4-dihydroxyphenyl-L-alanine (6-[18F]fluoro-L-DOPA) is an analog of L-DOPA and it is used for studying metabolism of dopamine function in humans with Positron Emission Tomography. Therefore, the need for reliable and simple production of this tracer had led to the improvement of the routine production. Various electrophilic and nucleophilic methods for the...
Dr
Galina Lujaniene
(Institute of Physics)
22/04/2010, 12:00
Chemistry of Nuclear Fuel Cycle, Radiochemical Problems in Nuclear Waste Management
Poster
Recently growing concern about contamination of the environment with radioactive and non-radioactive pollutants resulted in intensive studies related to the development of new technologies for separation of radionuclides from liquid waste. These new technologies should be based on highly selective materials (e.g., crystalline titanium silicates) which are hard to decompose over a wide range of...
Ms
Maria Mayordomo Martinez
(Department of Nuclear Chemistry, Faculty of Nuclear Sciences and Physical Engineering, CTU Prague)
22/04/2010, 12:00
Nuclear Methods in Medicine, Radiopharmaceuticals and Radiodiagnostics, Labelled Compounds
Poster
Triterpenes are a group of natural compounds. They are studied for their wide spectrum of biological activities: antitumor, antimutagenic, antiinflammatory, antiallergy, endocrine, immunomodulatory, antiviral, hepatoprotective, cardioprotective, antithrombotic or activities on central nervous system.1
Nowadays the investigation of antitumor drugs is really important because over one million...
Dr
Martina Rozmaric Macefat
(Rudjer Boskovic Institute)
22/04/2010, 12:00
Strontium, plutonium and americium are isotopes which determination is most often in practice (from all among alpha and pure beta emitters) because of their radiotoxicity, long period of half life and potential hazardous for human life. It is well known that their determination, because of radiochemical properties, require isolation from sample and separation from other elements (active or...
Mr
Ilia Volkov
(Instotute of solid state chemistry, UB RAS)
22/04/2010, 12:00
By using the method of solubility it is shown that long (15 days) exposure of monazite powder in the aqueous solutions of natural or synthetic humic acids (HA) give rise to 10 to 100 times more high solubility of heavy p-, d- и f-elements of Periodic system of D.I. Mendeleev in comparing with humic-less solutions. The level and rate of the solubility is shown to depend on the initial...
Jiří Mizera
(Nuclear Physics Institute, Academy of Sciences of the Czech Republic)
22/04/2010, 12:00
The study has been aimed at development of cheap sorbents of toxic heavy metals and radionuclides based on low rank, low energetic coals in combination with chitosan for use in treatment of both waste and drinking water and construction of active geochemical barriers. Sorbents based on lignite and naturally oxidized lignite (oxihumolite, leonardite) were prepared, both raw and impregnated with...
Ms
Kateřina Videnská
(Institute of Chemical Technology)
22/04/2010, 12:00
Chemistry of Nuclear Fuel Cycle, Radiochemical Problems in Nuclear Waste Management
Poster
Radionuclides of 99Tc and 129I belong among the fission products of spent nuclear fuel and are the largest contributions with long-term nuclear waste. The high proportion of risk from these radionuclides is due to their large inventories in many types of waste, long half-lives, and the perception that they are highly mobile in the environment and therefore play potentially large role in...
Dr
Samer Amayri
(Institute of Nuclear Chemistry, Johannes Gutenberg-Universität Mainz)
22/04/2010, 12:00
Chemistry of Nuclear Fuel Cycle, Radiochemical Problems in Nuclear Waste Management
Poster
The sorption of Np on clay such as Opalinus clay (OPA) is one of many important processes that affect the migration and retardation of Np in the geosphere. Clay formations are under consideration in several European countries as a potential host rock for high-level radioactive waste repositories [1]. We studied the sorption of Np(V) onto OPA (from Mont Terri, Switzerland) both by batch...
Dr
Monica Felipe-Sotelo
(Loughborough University)
22/04/2010, 12:00
Chemistry of Nuclear Fuel Cycle, Radiochemical Problems in Nuclear Waste Management
Poster
The current concept for the disposal of intermediate- and low-level waste in the United Kingdom involves the emplacement of the grouted waste confined in stainless steel canisters in a cementitious repository deep underground [1]. The NRVB (Nirex reference vault backfill) is a cementitious material specially formulated for this purpose, composed by a mixture of ordinary Portland cement (OPC),...
Dr
Nicholas Evans
(Loughborough University)
22/04/2010, 12:00
Chemistry of Nuclear Fuel Cycle, Radiochemical Problems in Nuclear Waste Management
Poster
Within the nuclear industry, waste management and disposal issues, both within the plants themselves and in the surrounding areas, are complex and problematic. This is partially a result of many decades of discharges within the storage site. A major problem is in determining the nature and distribution of contamination within the environment, be this on site in surrounding host rock, or...
Dr
Vejsada Jan
(Nuclear Research Institute)
22/04/2010, 12:00
Chemistry of Nuclear Fuel Cycle, Radiochemical Problems in Nuclear Waste Management
Poster
Sorption of radionuclides on bentonite represents in most of deep geological repository (DGR) concepts important process retarding radionuclide migration into geosphere. In the Czech Republic, DGR concept takes local bentonite into account as material for both buffer and backfill. The candidate bentonite comes from the Rokle deposit (NW Bohemia) and represents complex mixture of...
Mrs
Yulia Korneyko
(V. G. Khlopin Radium Institute)
22/04/2010, 12:00
Chemistry of Nuclear Fuel Cycle, Radiochemical Problems in Nuclear Waste Management
Poster
Technetium-99 is beta-active long-lived artificial radionuclide (half-life more than 200,000 years). Because of its long-life, high content in spent nuclear fuel, high ability to oxidize under aerobic conditions as ТсО4- Tc is one of the most dangerous radionuclides. Development of chemically durable host-phase for Tc disposal is important goal of research.
There are no natural minerals of...
Dr
Mihály Molnár
(MTA ATOMKI)
22/04/2010, 12:00
Chemistry of Nuclear Fuel Cycle, Radiochemical Problems in Nuclear Waste Management
Poster
To obtain reliable estimates of the quantities and rates of the gas production in L/ILW a series of measurements was carried in the last seven years in Hungary. Drums filled with selected original L/ILW coming form the light water PWR type Paks Nuclear Power Plant (Hungary) were placed into special hermetic containers and its gas generation was measured carefully. Headspace gas analysis of...
Filip Kužel
(CTU in Prague)
22/04/2010, 12:00
Application of solid extractants containing di-(2-ethylhexyl)phosphoric acid (HDEHP) in the support based on modified polycrylonitrile (PAN) has been proposed at the CTU in Prague, Department of Nuclear Chemistry, for the determination of 90Sr by means of measuring the activity of its 90Y daughter utilising a procedure similar to that developed by Burnett et al. in 1975...
Dr
Albert Aloy
(Khlopin Radium Institute)
22/04/2010, 12:00
Chemistry of Nuclear Fuel Cycle, Radiochemical Problems in Nuclear Waste Management
Poster
Vitrification of radioactive wastes and high temperature synthesis of glass and ceramics for ionizing radiation sources, containing Cs-137, is accompanied by discharge of its vapours. The off-gas contaminated by Cs-137 must be cleaned up using different trapping systems.
In general two methods of Cs-137 vapour catching are possible, differing both in process character (nature) and realization...
Mr
Kamil Vavřinec Mareš
(Czech Republic)
22/04/2010, 12:00
Chemistry of Nuclear Fuel Cycle, Radiochemical Problems in Nuclear Waste Management
Poster
This project focuses on studying properties of extraction-chromathographic material prepared by embedding of tributylphosphate (TBP) into the matrix of polyakrylonitrile (PAN). After elementary characterization of the prepared materials, the kinetics of uranium extraction from 3 mol·L-1 HNO3 was examined. The influence of nitrates and nitric acid concentration on the values of weight...
Ms
Marie Reková
(student)
22/04/2010, 12:00
Nuclear Methods in Medicine, Radiopharmaceuticals and Radiodiagnostics, Labelled Compounds
Poster
Model study of the γ-immunoglobulin G (Human or Bovine IgG, polyclonal antibodies) and bifunctional chelating agent diethylenetriaminepentaacetic acid dianhydride (cDTPAA) conjugation was carried out. Various values of the cDTPAA/antibody conjugation ratio (15/1, 40/1, 105/1, 125/1 and 250/1) and the weight concentration of IgG 10, 5 and 1 mg mL-1 in 0.1 mol L-1 phosphate...
Prof.
Alexandru Cecal
("Al.I. Cuza" University, Faculty of Chemistry)
22/04/2010, 12:00
The variation of the concentration of U(IV) and U(VI) species from uranium ores due to the alpha-radiolysis induced by an Am-241 source in several deposit conditions is studied. The X-rays patterns show some differences for the studied ores before and after external alpha-radiolysis. The concentrations of U(IV) and U(VI) species was determined spectrophotometrically.
308.
The liquid-liquid extraction of minor actinides with CyMe<sub>4</sub>-BTBP in selected diluents
Mr
Petr Distler
(CTU in Prague)
22/04/2010, 12:00
The CyMe4-BTBP (6,6’-bis(5,5,8,8-tetramethyl-5,6,7,8-tetrahydro-1,2,4-benzotriazine-3-yl)-2,2’-bipyridine) has been demonstrated to be a prospective extractant for the liquid-liquid extraction of minor actinides. For industrial applications, its solubility in 1-octanol is low and the kinetics of extraction in this diluent is slow. Better performance has been demonstrated in...
Dr
Monica Felipe-Sotelo
(Loughborough University)
22/04/2010, 12:00
Chemistry of Nuclear Fuel Cycle, Radiochemical Problems in Nuclear Waste Management
Poster
One of the illustrative disposal concepts considered by the NDA- RWMD (Nuclear Decommissioning Authority – Radioactive Waste Management Directorate) for the disposal of intermediate-level wastes and some low-level wastes is that of grouted waste packages surrounded by a cementitious backfill. The potential use of superplasticisers to improve flow properties of waste encapsulation grouts offers...
Prof.
Wangsuo Wu
(Lanzhou University)
22/04/2010, 12:00
Chemistry of Nuclear Fuel Cycle, Radiochemical Problems in Nuclear Waste Management
Poster
Adsorption of Cs+ to Beishan soil (BS) as function of pH, foreign ions, temperatures, contact time and humic substances was studied in detail under ambient conditions using batch techniques. The results suggested that the adsorption of Cs+ was strongly dependent on ionic strength, whereas nearly independent of pH values, and the values of Kd were 1388.78 mL/g...
barbora Drtinova
(CTU Prague)
22/04/2010, 12:00
Uranyl-sulphate complexes are the most significant U(VI) species in acid solutions containing sulphate ions. The study of their properties is of practical significance for characterisation of solutions used in underground uranium ore leaching and following remediation of leaching sites. At low pH values, the speciation of U(VI) mainly depends on its total concentration [UVI] and sulphate ions...
353.
Trace element distribution in crops grown under industrial stress: a multidisciplinary approach
Prof.
Cristiana Oprea
(JINR)
22/04/2010, 12:00
The impacts of the trace heavy metals released by different industries on croplands were monitored by different environmental media. All the sampling locations based on a regular monitoring grid network were selected. To all samples collected in area of the smelter complex (20 x 20 km2), one to three locations has to be contributing to each sampling location. The spots were further...
Prof.
Cristiana Oprea
(JINR)
22/04/2010, 12:00
X-ray fluorescence spectrometry (XRFS) was used as a multielement method of evaluation of individual whole human tooth or tooth tissues for their amounts of trace elements. Measurements were carried out on human enamel, dentine, and dental cementum, and significant differences in tooth matrix composition were noted. In addition, the elemental concentrations determined in teeth from subjects of...
Dr
Kallola Kumar Swain
(Bhabha Atomic Research Centre, Mumbai - 400085, India)
22/04/2010, 12:00
Arsenic contamination of drinking water has been reported from many parts of the world. The maximum permissible level of total arsenic in drinking water is 10 microgram L-1 as recommended by WHO. Natural geochemical contamination through soil leaching is the primary contributor of dissolved arsenic in ground water around the world. The most common species present in water are the inorganic...
Dr
Dmitri Davydov
(Joint Institute for Power and Nuclear Research)
22/04/2010, 12:00
Behaviour of radionuclides in such processes as sorption, ion-exchange, ultrafiltration, etc., that are used for removal of radionuclides from solution, is largely determined by their speciation in solution. The hydrolysis of metal ions in solution is particularly interesting in that respect, since most of the liquid radioactive wastes are aqueous solutions.
The following forms of...
Anumaija Leskinen
(Loughborough University)
22/04/2010, 12:00
Chemistry of Nuclear Fuel Cycle, Radiochemical Problems in Nuclear Waste Management
Poster
Natural organic matter (NOM) is being characterised and investigated for use as a remediation material in various applications.
Two readily available environmental materials are being tested:
Material A: 68% by weight of the material is organic including 19% humic acid, 28% fulvic acid and 21% humin. 32% of the material is inorganic, containing 23% iron.
Material B: 57% by weight of the...
Mr
Tamás Nagy
(Isotoptech Co. Ltd., Debrecen, Hungary)
22/04/2010, 12:00
Chemistry of Nuclear Fuel Cycle, Radiochemical Problems in Nuclear Waste Management
Poster
The Radioactive Waste Treatment and Disposal Facility, Püspökszilágy, Hungary is in operation since 1976. Low and intermediate level radioactive wastes originating from different industrial, medical, educational and scientific areas are treated here. At the beginning of its operation the facility had to fulfil only safety requirements but not regulations pertaining to the form and the quality...
Dr
Maria José Madruga
(Nuclear and Technological Institute (ITN), Portugal)
23/04/2010, 03:00
Chemistry of Nuclear Fuel Cycle, Radiochemical Problems in Nuclear Waste Management
Verbal
Safety assessment of low and intermediate level waste repositories requires the understanding of radionuclides sorption-desorption mechanisms, mainly the degree of interaction between radionuclides and mineral surfaces with the aim to analyse processes that can affect the safety of the repository at both near and far-field zones. Among the different radionuclides that are part of the...
Ivana Krausová
(Nuclear Physics Institute ASCR)
23/04/2010, 03:00
Possibilities of nondestructive determination of fluorine in selected geological (coals, rocks) and biological reference materials by instrumental photon activation analysis (IPAA) using the MT 25 microtron have been studied. The determination has been based on counting of the non-specific 511 keV annihilation gamma rays of F-18, product of the photonuclear reaction F-19 (γ, n) F-18 and a pure...
Mr
Alexander Zulauf
(Radiochemie, FB Chemie, Philipps-Universität Marburg, Marburg Germany)
23/04/2010, 03:15
The monitoring of long-lived radionuclides is of great importance in the context of the surveillance of nuclear facilities, during their operation as well as during their decommissioning. This is especially true for radionuclides of rather volatile elements as chlorine and iodine, main interested being Cl-36 and I-129. LSC is a widely used measurement technique for the determination of Cl-36...
114.
Long term diffusion experiment (LTD) in Grimsel URL: Comparison of modeling and in-situ results
Mrs
Václava Havlová
(Nuclear Research Institute Řež plc.)
23/04/2010, 03:20
Chemistry of Nuclear Fuel Cycle, Radiochemical Problems in Nuclear Waste Management
Verbal
Phase 1 (2005 – 2008) of the long term diffusion experiment (LTD) project has taken place in the Grimsel underground research laboratory (GTS, Switzerland) in a joint effort between NAGRA (Switzerland), University of Bern (Switzerland), NRI Rez (Czech Republic), HYRL (Finland), JAEA (Japan) and AIST (Japan). The project aim was to study matrix diffusion of radionuclides relevant to performance...
Dr
Laszlo Palcsu
(Institute of Nuclear Research of the Hungarian Academy of Sciences)
23/04/2010, 03:30
As decay products, helium isotopes can clearly indicate the presence of tritium and alpha decaying isotopes in a closed system. This study presents the helium and neon measurements and their interpretation of long-term headspace gas investigations in L/ILW waste drums from Paks Nuclear Power Plant and closed vaults of the Radioactive Waste Treatment and Disposal Facility, Püspökszilágy,...
Mr
Petr Večerník
(Nuclear Research Institute Řež plc.)
23/04/2010, 03:40
Chemistry of Nuclear Fuel Cycle, Radiochemical Problems in Nuclear Waste Management
Verbal
In several concepts of deep geological repository (DGR) development granites are considered as potential hosts rocks (Sweden, Finland, Czech Republic) . Safety calculations, evaluating safety functions of DGR barriers, require information about radionuclide migration within fractured rock formations, where advection and matrix diffusion are considered as the most important processes for...
Dr
ANA PANTELICA
(Horia Hulubei National Institute for Physics and Nuclear Engineering (IFIN-HH))
23/04/2010, 03:45
The environmental pollution by industrial activities presents a significant health risk to the man. One of the possible pathways of pollutants from the environment to human organisms is the consumption of foodstuffs polluted by industrial activities. This paper presents the levels of elemental concentrations determined by Instrumental Neutron Activation Analysis (INAA) in various vegetable...
Dr
Ivo Světlík
(Nuclear Physics Institute AS CR)
23/04/2010, 04:00
Verbal
Prof.
Juan F. Facetti-Masulli
(Hydroconsult)
23/04/2010, 04:15
Artifacts of pottery belonging to the Guarani ethnic group were investigated by XRF techniques. The Tupi-Guarani, is one of the three main ethnics groups representative of the Neolithic culture in the amazonian scope. Such an ethnic group dispersed towards the South; in the Paraguayan area between Paraguay and Parana Rivers several Guarani ethnic movements by both rivers and their tributaries...
Mr
Juan Mantero
(University of Seville)
23/04/2010, 04:30
In radiochemical analyses with environmental or industrial samples sometimes happens that certain matrices have a refractory behaviour and usual leaching processes cannot deal with its dissolution properly. There are in the bibliography different ways to solve this problem as the use of microwaves digestions or HF digestions (or both together) and also fusion techniques among others. This work...
Dr
Teodora Retegan
(Chalmers University of Technology)
23/04/2010, 05:15
The need for engineers and scientists who can ensure safe and secure use of nuclear energy is large in Sweden and internationally. Chalmers University of Technology has therefore launched a new 2-year master´s program in Nuclear Engineering, with start from the autumn of 2009. Since the program is open to both Swedish and foreign students and the teaching language is English, the first year...
Dr
Václav Čuba
(CTU in Prague, Department of Nuclear Chemistry)
23/04/2010, 05:30
Department of Nuclear Chemistry (DNRC) exists at the Faculty of Nuclear Sciences and Physical Engineering of the Czech Technical University in Prague since the establishment of this faculty in 1955. From the beginning, many recognized scientists were involved in the department activities, among others František Běhounek (student of Marie Curie), Jiří Starý and Petr Beneš. Since 2003, part of...
Prof.
Jan John
(CTU in Prague, FNSPE, Centre for Radiochemistry and Radiation Chemistry)
23/04/2010, 05:45
The renaissance of nuclear power is already requiring a significant increase in the number of the respective specialists, amongst others are nuclear chemists. Because the current situation in nuclear chemistry education and training in Europe is quite diverse, a project for cooperation in education in nuclear chemistry (CINCH) seemed to be needed.
The project aims to coordinate the education...
Prof.
Heinz Gäggeler
(Paul Scherrer Institute, PSI Villigen, Switzerland)
23/04/2010, 06:00
Verbal
Mr
Dmitry Grozdov
(Institute of Geochemistry and Analytical Chemistry of the Russian Academy of Sciences)
Nuclear Analytical Methods
Verbal
Gamma-activation autoradiography is an effective method for revealing of features of noble elements distribution in geological samples [1]. Because the activating field of microtron bremsstrahlung displays sharp depression of intensity, the area of the analyzed samples usually should not exceed 1 cm2. However, analysis of such relatively small samples may be done with success by means of other...
Dr
Shin-ichi Koyama
(Japan Atomic Energy Agency)
Chemistry of Nuclear Fuel Cycle, Radiochemical Problems in Nuclear Waste Management
Verbal
A multi-functional separation process is proposed on the Adv.-ORIENT Cycle (Advanced Optimization by Recycling Instructive Elements) concept1). The tertiary pyridine-type anion-exchange resin embedded in silica beads was demonstrated for the separation process using spent fuel. In this process, hydrochloric acid (HCl), mixture of nitric acid (HNO3) and methanol (MeOH) should be used as...
Dr
Vladimir Tolmachev
(Uppsala University)
Nuclear Methods in Medicine, Radiopharmaceuticals and Radiodiagnostics, Labelled Compounds
Verbal
Radionuclide molecular imaging is a promising approach to detection of molecular targets for cancer therapy. Small imaging agents provide higher sensitivity and better specificity than antibodies or their fragments. Molecular display techniques (phage, ribosomal, yeast or bacterial display) allow for combinatorial selection of small peptides with high specificity to different proto-oncogene...
Dr
Byoung-Jik Kim
(Korea Institute of Nuclear Safety)
Radionuclides in the Environment, Radioecology
Poster
The monitoring airborne radioactive particle became a prominent figure for early warning to form the basis of effective and successful prevention against disasters like the misfortune in Chernobyl. Air sampling and analyzing techniques are essential for early detecting nuclear activities and/or accidents of neighboring countries.
Aircraft-borne sampling system is the best way to approach the...
Dr
Asako Shimada
(Nuclear Cycle Backend Directrate, Japan Atomic Energy Agency)
Chemistry of Nuclear Fuel Cycle, Radiochemical Problems in Nuclear Waste Management
Verbal
Lots of metal waste of which surface is contaminated with radionuclides is generated from the decommissioning of nuclear facilities. For the waste management, characterization of radionuclides inventory in the waste is required. In this work, determination method of alpha nuclides, Th, U, Pu, and Am, contained in the metal waste was developed.
Taking into account the half-lives of these...
Ms
Marina Gustova
(senior engineer)
Production and Application of Radionuclides
Verbal
237U was obtained in the 238U (γ, n) 237U reaction in the electron accelerator - microtron МТ-25 of the Flerov Laboratory of Nuclear Reactions (FLNR JINR, Dubna). The method of recoil atoms capture with application to the nanostructure material – hydrous manganese dioxide (cryptomelane-type) in a solid-solid system was used for the separation of...
Dr
Vladimir Chistyakov
(Russia, Rosatom, JSC"State Scientific Center-Research Institute of Atomic Reactors", Radiochemical Unit)
Nuclear Analytical Methods
Verbal
Requirements imposed to nuclear fuel in terms of stoichiometric composition and chemical purity are rather high and depend on the technical and operating conditions of fuel rods in a nuclear reactor.
RIAR has long operating experience with the production facility for granulated mixed nuclear fuel (MOX fuel) using electrolytic precipitation of uranium and plutonium oxides from molten...
Dr
Vladimir Kolotov
(Vernadsky Institute of Geochemistry and Analytical Chemistry, Russian Academy of Sciences)
Nuclear Analytical Methods
Verbal
Recently it has been demonstrated that activation of samples by bremsstrahlung radiation of microtron with further application of digital autoradiography is prospective method for detection of noble elements micro inclusions in geological samples. A digital version of the autoradiography has been developed [1].
Current investigations have been directed to extension of digital...
Dr
Rick Paul
(NIST)
Nuclear Analytical Methods
Verbal
Neutron activation analysis (NAA) has played a key role in the certification of As in biological reference materials at NIST. Instrumental neutron activation analysis (INAA) with counting of 76As is typically used to determine ≥1 mg/kg As in biological materials, though lower amounts may be determined, depending on the matrix. At lower levels, As determination is often hindered by the...
Dr
Jiyon Lee
(Korea Institute of Nuclear Safety)
Nuclear Analytical Methods
Poster
In order to diagnose each function of currently adopted xenon acquisition system (Gammadata, SAUNA II), two kinds of preliminary test have been carried out. First of all, the mole fraction of the air concentrated in the transport columns adopted for the SAUNA was measured by utilizing mass spectrometer. It has been verified that the terrestrial xenon was well concentrated to be 0.2% of mole...
Dr
Vladimir Sladkov
(UMR CNRS 8608 - Institut de Physique Nucléaire)
Separation Methods, Speciation
Verbal
Capillary zone electrophoresis (CZE) was used to study of uranyl sorption on silica and rutile in the presence of short chain carboxylic acids. These acids are chosen as they may be released in environment by decay of plant, animal and microbial tissues1. They can be also used as simple models of more complicated natural organic matter.
First, separation and simultaneous determination of...
Prof.
Giovanni Consolati
(Politecnico di Milano, Dipartimento di Fisica - Italy)
Radiation Chemistry
Verbal
Radiation methods are largely used for polymerisation and polymer modification [1, 2], since irradiation induces changes in the structure of materials which can be exploited to obtain new features or to improve their performance. On the other hand, degradation of the polymer properties is observed under the combined action of ionising radiation and oxygen [3]; chain scissions and cross links...
164.
Electro-fluid analysis of a molten-salt electrorefiner for pyrochemical nuclear waste treatment
Dr
K. R. Kim
(Korea Atomic Energy Research Institute)
Chemistry of Nuclear Fuel Cycle, Radiochemical Problems in Nuclear Waste Management
Verbal
Pyrochemical technology have given us the capability to treat spent nuclear fuels and been acknowledged to have the proliferation-resistant principles. These processes could play on an important role in reducing the long-term hazards of a spent nuclear fuel by separating the uranium and transuranic actinides, which in turn may be transmuted in a fast breeder reactor.
The most effective way...
Ms
Inga Zinicovscaia
(Joint Institute for Nuclear Research)
Nuclear Analytical Methods
Poster
Indigenous bacteria can be successfully used to either detoxify or immobilize toxic heavy metals. These bacteria are under continuous investigation, and in-depth molecular understanding has been developed for some of them. However, up to date the dependence between the ability of bacteria to reduce or immobilize metals and their elemental compositions is not clear yet. For the first time...
Prof.
Eiliv Steinnes
(Norwegian University of Science and Technology)
Radionuclides in the Environment, Radioecology
Verbal
Norway was one of the European countries most seriously affected by the Chernobyl-accident. According to a nationwide survey in 1986 the total deposition of 137Cs in the country was estimated at 2300 ± 200 TBq and about 10 % of the territory received more than 20 kBq m-2 of this radionuclide. This has resulted in significant exposure of wildlife as well as domestic animals grazing in forest...
Ms
Alicia Le Du
(Subatech)
Nuclear Methods in Medicine, Radiopharmaceuticals and Radiodiagnostics, Labelled Compounds
Verbal
Bi-212 is a potentially interesting alpha radionuclide for targeted alpha therapy. The principle is based on the stable binding of alpha emitting radionuclides to cancer selective carrier molecules, such as antibodies or peptides. The challenge is to deliver the radioactive atoms to the target with the objective to find the right balance between toxicity and anti-tumour effect.
Considering...
Mrs
Olga Zhukova
(Institute of global climate and ecology)
Production and Application of Radionuclides
Verbal
Global ploughing up the areas, especially increased in last 2 century, lead to fundamental changing of the sediment load balance of flat territories, at first by repeatedly increasing erosion-accumulating processes. Using 137Cs as a marker of erosion-accumulating processes allow estimate of intensity these processes by the period from the middle of 50-th years, and in a number of cases...
Prof.
Mario Mariani
(Politecnico di Milano - Dipartimento di Energia - Milano - Italy)
Nuclear Analytical Methods
Poster
The determination of alpha emitters, namely uranium, thorium and plutonium isotopes, in the soils, is a useful way to evaluate the radioactive fallout and to better understand the isotopic distribution profiles in different soil layers.
Due to the particular geographic position and the economical and political condition, Cuba could be considered as a unique “natural habitat” in the boreal...
Prof.
Heino Nitsche
(UC Berkeley and LBNL)
Radionuclides in the Environment, Radioecology
Verbal
Of the many factors that influence the transport of actinides in the environment, microorganisms remain among the least understood and most difficult to study. Through a multitude of interactions, bacteria can play a significant role in both the environmental mobilization and immobilization of actinides. This presentation will give an overview of the current status of the field that will be...
Mr
Fernando Morcillo de Amuedo
(Microbiology Department, University of Granada)
Radionuclides in the Environment, Radioecology
Verbal
The present study describes the speciation of uranium associated with Idiomarina loihiensis MAH1, a bacterial strain with biomineralization potential abilities isolated from the Alboran Sea in the west side of the Mediterranean Sea. The interactions of uranium with this marine bacterium was studied both in NaClO4 solution as well as in Sea water using a multidisciplinary approach combining...
Dr
Marina Frontasyeva
(Joint Institute for Nuclear Research)
Nuclear Analytical Methods
Verbal
Within the broad spectrum of activities in the Life Sciences at JINR such as nuclear medicine and pharmacy, radiation biology, radioecology, radioisotope production – radioanalytical investigations play a special role due to the long-term experience in multi-element instrumental neutron activation analysis (INAA) at the reactor IBR-2 of FLNP, JINR. Activation with epithermal neutrons along...
Dr
M.V. Frontasyeva
(Joint Institute for Nuclear Research)
Nuclear Analytical Methods
Verbal
Bacterial reduction and detoxification of potentially toxic metals is one of most promising strategies for the bioremediation of contaminated environmental media. In our previous studies we have established that the Gram-positive bacterial strain Arthrobacter globiformis isolated from basalts taken from ecologically mostly polluted region of Georgia (Marneuli) can reduce and detoxify of Cr(VI)...
Dr
Maria do Carmo Freitas
(Reactor-ITN, Instituto Tecnológico e Nuclear, E.N. 10, 2686-953 Sacavém, Portugal)
Nuclear Analytical Methods
Verbal
At three sites of Portugal – Viana do Castelo, Sacavém, Sines – bark from Olea europea and the lichen Parmelia caperata, collected in clean areas, were exposed. The situation of the sites allows different meteorological conditions, from rainy to dry and cooler to warmer. Three different procedures for the lichen exposure were adopted: rectangular flat pieces, the lichen in its original form...
Dr
Francois Caron
(Chemistry and Biochemistry Department)
Separation Methods, Speciation
Verbal
It is well established that Natural Organic Matter (NOM) plays an important role in metal speciation, in the transport of radioactive contaminants, in the acid-base control of natural waters, etc. NOM originates from various natural and human-impacted processes, and its constituents feature various molecular sizes, functional groups, and other properties which could be important for metal or...
Prof.
Elisabete A. De Nadai Fernandes
(Nuclear Energy Center for Agriculture, University of São Paulo)
Nuclear Analytical Methods
Verbal
Consumer confidence in beef has been hampered by epidemics such as bovine spongiform encephalopathy (BSE) and foot and mouth disease (FMD). Legislation has increased restrictions on beef trade worldwide. For example, the beef trade in the European Union requires traceability throughout the supply chain, allowing the consumers to be aware of the origin of meat available in the market....
Mr
Dmitry Mikhailov
(Nizhny Novgorod State University)
Chemistry of Nuclear Fuel Cycle, Radiochemical Problems in Nuclear Waste Management
Verbal
Crystal chemical principle allows to create new compounds with expected structure and properties. In this work it was used for “constructing” new f-element phosphates with langbeinite type structure (Lb). Earlier we used this approach for calculation of formula cation compositions of tetrahedral-octahedral frameworks for NZP and Lb forms [1], then some new phosphates with Lb structure were...
Dr
Michail Alyapyshev
(Khlopin Radium Institute)
Separation Methods, Speciation
Verbal
Nuclear waste management is nowadays based on the usage of light hydrocarbon liquids as diluents in extraction technology. PUREX process deals with tributylphosphate solution in n paraffins; various extraction processes developed for high level waste treatment also use light hydrocarbon diluents (e.g. dodecane) to be PUREX-compatible.
Heavy polar diluents that are widely studied for purposes...
Ms
Katalin Berkesi
(University of Pannonia Institute of Radiochemistry and Radioecology)
Production and Application of Radionuclides
Poster
The version of the AP-CITROX technology (pre-oxidation: alkaline potassium permanganate, oxide-solution: blend of oxalic and citric acid) applied in the steam generators of the Paks NPP (Nuclear Power Plant) was not adequately developed considering its chemical, analytic and corrosion aspects. To replace the AP-CITROX procedure, a new, efficient „soft” chemical decontamination technology has...
Mr
Razvan Adam Rebeles
(Vrije Universiteit Brussel, Cyclotron Laboratory)
Production and Application of Radionuclides
Verbal
Due to the rapid increase of the use of nuclear medicine techniques in modern clinical diagnosis and in a selected series of therapies, researchers efforts are focusing for the standardization and optimization of different production routes for a series of emerging radioisotopes like 64Cu, 67Cu, 114mIn, 211At.
In particular the EC/β+/β- decay of 64Cu makes it a promising candidate for both...
Prof.
Kattesh Katti
(University of Missouri)
Nuclear Methods in Medicine, Radiopharmaceuticals and Radiodiagnostics, Labelled Compounds
Verbal
The most recent study involving 77,000 North American men has shown that regular prostate specific antigen (PSA) screening did not save a significant number of lives over 10 years. Development of cancer receptor specific gold nanoparticles will allow efficient targeting/optimum retention within tumors and thus provide synergistic advantages in oncology as it relates to molecular imaging and...
Dr
Xiaolin Hou
(Riso DTU)
Nuclear Analytical Methods
Verbal
With increasing numbers of nuclear facilities, especially nuclear power reactors, being closed in recent years and from now on, a considerable work is going to be carried out all over the world for decommissioning these nuclear facilities. For this purpose, characterization of various wastes from decommissioning is required for evaluation of the radioactivity inventory in various materials and...
Ms
Veronika Kleinova
(Nuclear Physics Institute of the ASCR, 250 68 Rez by Prague, Czech Republic)
Verbal
Dr
Risto Harjula
(University of Helsinki)
Chemistry of Nuclear Fuel Cycle, Radiochemical Problems in Nuclear Waste Management
Verbal
Selective ion media, e.g. inorganic adsorbents and ion exchangers, are increasingly used for the removal of key radionuclides such as 60Co, 90Sr and 137Cs from nuclear waste effluents due to their radiation stability, high processing capacity and high decontamination efficiency [1,2]. The materials used that are commercially available (e.g. zeolites, titanates, silicotitanates,...
Prof.
Amares Chatt
(Dalhousie University)
Nuclear Analytical Methods
Verbal
Simultaneous speciation neutron activation analysis (SSNAA) technique is being developed in our laboratory over the last 15 years. This technique can now be used for the simultaneous determination of not only various species of a single element but also species of other elements present in the same sample. Almost all speciation techniques consist of two steps. The first step involves the...
Lucas Sweet
(Pacific Northwest National Laboratory)
Chemistry of Actinide and Trans-actinide Elements
Verbal
The environmental fate and transport of transuranium elements and the search for alternative f-element separation methods require a better understanding of the speciation of transuranics under oxidizing alkaline conditions, especially in the presence of ubiquitous ligands such as peroxide and carbonate. From our exploration of the Ce and Pu peroxo-carbonate systems several new structures...
Dr
Verónica Elizabeth BADILLO-ALMARAZ
(NATIONAL INSTITUTE OF NUCLEAR RESEARCH)
Chemistry of Nuclear Fuel Cycle, Radiochemical Problems in Nuclear Waste Management
Verbal
The chemistry of several B-metals in the +II oxidation state is of concern for nuclear waste management. Isotopes of ruthenium (Ru), rhodium (Rh) and palladium (Pd) fission products formed in nuclear spent fuels can have an important contribution to the long-term radiotoxicity of high level wastes. The sorption of one long lived fission products, Pd on hydroxyapatite (Ca10(PO4)6(OH)2) has been...
Dr
Verónica Elizabeth BADILLO-ALMARAZ
(NATIONAL INSTITUTE OF NUCLEAR RESEARCH)
Production and Application of Radionuclides
Verbal
Rhenium-188 is a recommended radioisotope for diagnostic and therapeutic techniques because of its attractive physical and chemical properties: half-life 16.98 hours, a strong particulate emission (beta energy of 2.12 MeV) and an imageable gamma emission (15 %, 155 keV) ideal for current gamma camera imaging of tumors. Radiopharmaceuticals labeled with 188Re are currently used in clinical...
Prof.
Brit Salbu
(Norwegian University of Life Sciences, N-1432 Ås, Norway)
Separation Methods, Speciation
Verbal
Naturally occurring and artificially produced radionuclides in the environment can be present in different physico-chemical forms (i. e. radionuclide species) varying in size (nominal molecular mass), charge properties and valence, oxidation state, structure and morphology, density, complexing ability etc. Low molecular mass (LMM) species are believed to be mobile and potentially bioavailable,...
Prof.
Jean-Pierre SIMONIN
(CNRS / Université P.M. Curie (Paris 6))
Separation Methods, Speciation
Verbal
A theoretical description of speciation and of the thermodynamic properties of lanthanide and actinide ionic solutions is proposed in the framework of the mean spherical approximation (MSA) [1-4]. In this model the ions are regarded as charged hard spheres immersed in a dielectric continuum representing the solvent (water). An interesting feature of the MSA is that it yields analytic...
Dr
KALLOLA KUMAR SWAIN
(Analytical Chemistry Division, Bhabha Atomic Research Centre, Trombay, Mumbai - 400 085, India)
Nuclear Analytical Methods
Verbal
Neutron Activation Analysis (NAA) using short-lived radionuclides is advantageous in terms of less turn-around time of analysis. As a part of k0-based NAA (single comparator NAA) standardization program for short-lived nuclides, pneumatic carrier facilities (PCF) at CIRUS and Dhruva reactors of Bhabha Atomic Research Centre (BARC) were characterized by determining sub-cadmium-to-epithermal...
Dr
A.V.R. Reddy
(Analytical Chemistry Division, Bhabha Atomic Research Centre, Trombay, Mumbai - 400 085, India)
Nuclear Analytical Methods
Verbal
The k0-based Neutron Activation Analysis (k0-NAA) was adapted in Bhabha Atomic Research Centre (BARC) in the year 1994 and since then it is being used in our R&D activities. The present article gives an account of developments and applications of k0-based NAA as well as internal monostandard NAA (IM-NAA) using research reactors at BARC. Irradiation sites were characterized by cadmium ratio...
Dr
Gilles Montavon
(Laboratoire Subatech (CNRS/IN2P3 / Ecole des Mines de Nantes / Université de Nantes))
Separation Methods, Speciation
Verbal
Astatine (At), element 85, is below iodine in the periodic table of elements. One of its isotopes, 211At, is a promising candidate as a therapeutic agent in nuclear medicine [1]. Although it is clear that much of the chemistry described for halogens is applicable to astatine, a more metallic character is expected as compared to its nearest halogen neighbor, iodine. However, At chemistry in...
Dr
Michiko Fukushima
(Ishinomaki Senshu University)
Nuclear Analytical Methods
Verbal
There is an increasing interest in estimating the total and bioaccessible fraction of elements of both nutritional and toxicological importance in cultivated oysters consumed by Japanese population groups. Oysters are cultivated in Japan by hanging them on an 11-m long rope in the ocean. Levels of 15 elements in oysters cultivated at different depths were investigated by INAA in the present...
Mrs
Václava Havlová
(Nuclear Research Institute Řež plc.)
Chemistry of Nuclear Fuel Cycle, Radiochemical Problems in Nuclear Waste Management
Verbal
Chemical leaching of uranium in Northern Bohemia (Straz pod Ralskem) took place in between 1972 to 1996. Acid technology solutions, mainly consisting of sulphure acid (more than 4 mil tons), nitric acid, ammonia and fluoric acid, were pumped into uranium bearing layers and caused contamination of Cenomanian and Turonian water reservoirs. Cenomanian aquifer containing U was contaminated by more...
Dr
Marie-Christine Josick Comarmond
(ANSTO (Australian Nuclear Sci Technol Org))
Radionuclides in the Environment, Radioecology
Verbal
Titanium dioxide has properties that make it an excellent substrate for experimental study and theoretical development of adsorption models, including negligible solubility and a near neutral point of zero charge[1]. A number of different forms of Ti-oxide have been used in experimental studies, including hydrous Ti-oxide, anatase, rutile and various commercially available samples that contain...
Dr
Rolf Zeisler
(National Institute of Standards and Technology)
Nuclear Analytical Methods
Verbal
Carbon nanotubes (CNT) are one of the first major nanoscale manufactured products to enter the market. Therefore, reliable and reproducible quantitative measurement and characterization of carbon nanotube samples are important for progress in understanding of these materials and the development of new applications incorporating these materials. An additional value is the development of an...
