Conveners
Nuclear Fuel Cycle: NFC 1
- Vรกclava Havlovรก (International Atomic Energy Agency)
- Marco Cologna (EC-JRC)
Nuclear Fuel Cycle: Poster session
- There are no conveners in this block
Nuclear Fuel Cycle: NFC 2
- Eva De Visser - Tรฝnovรก (NRG)
- Vรกclav Tyrpekl (Faculty of Science, Charles University)
Nuclear Fuel Cycle: NFC 3
- Thorsten Stumpf (Helmholtz-Zentrum Dresden-Rossendorf e. V.)
- Nick Evans (Nottingham Trent University)
Nuclear Fuel Cycle: NFC 4
- Christian Schreinemachers (Forschungszentrum Jรผlich GmbH, Institute of Fusion Energy and Nuclear Waste Management, IFN-2: Nuclear Waste Management)
- Michael Ojovan (The University of Sheffield)
Nuclear Fuel Cycle: NFC 5
- Susan Britz
- Barbora Drtinovรก (CTU Prague)
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Eva De Visser - Tรฝnovรก (NRG PALLAS & FNSPE, CTU Prague)5/11/26, 1:30โฏPMChemistry of Nuclear Fuel Cycle, Radiochemical Aspects of Nuclear Waste ManagementInvited
Several pioneering irradiation experiments on minor actinide bearing blanket materials have been performed at High Flux Reactor of NRG PALLAS. One aim of these projects has been to assess solutions for reducing the volume and hazard of high level long-lived radioactive waste, including closure of the nuclear fuel cycle. First-of-a-kind post-irradiation examination (PIE) data have been obtained...
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Fangli Fan5/11/26, 2:00โฏPMChemistry of Nuclear Fuel Cycle, Radiochemical Aspects of Nuclear Waste ManagementVerbal
Nuclear energy has emerged as a pivotal and effective technology to address the global energy crisis and mitigate climate change. However, the large-scale deployment of nuclear energy has resulted in the generation of substantial quantities of spent nuclear fuel (SNF), which comprises dozens of chemical elements. Specifically, SNF contains approximately 95% unutilized uranium, 1% plutonium,...
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Vรกclav Tyrpekl5/11/26, 2:20โฏPMChemistry of Nuclear Fuel Cycle, Radiochemical Aspects of Nuclear Waste ManagementVerbal
Understanding the behaviour of fission products (FPs) is critical for advancing nuclear reactor safety and optimising radioactive waste management. This contribution presents preparation and characterisation of simulated nuclear fuel pellets based on uranium dioxide doped with volatile FPs - caesium and iodine - using spark plasma sintering (SPS). Compared to conventional sintering, SPS...
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Todd Whitehorne (Canadian Nuclear Laboratories)5/11/26, 2:40โฏPMChemistry of Nuclear Fuel Cycle, Radiochemical Aspects of Nuclear Waste ManagementVerbal
Heavy water and lithium containing molten salt moderated commercial fission energy generating reactors produce tritium in significant quantities. Tritium, the radioactive isotope of hydrogen, needs to be removed from the moderator to reduce worker exposure, environmental release and maintain energy conversion efficiency.
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Future commercial fusion power plants will operate using Deuterium &... -
SAJID IQBAL (Korea Advanced Institute of Science and Technology (KAIST))5/11/26, 5:15โฏPMChemistry of Nuclear Fuel Cycle, Radiochemical Aspects of Nuclear Waste ManagementPoster
Radioactive sludge wastes generated during reactor decontamination and dismantling are complex matrices containing metal oxides, silica, carbonates, carbonaceous phases, and radionuclides such as Cs, Sr, and Co. To solidify such diverse and complex waste streams, geopolymers (GP) have emerged as a low-carbon-emitting, less porous, and robust alternative to conventional cementitious materials....
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Yanhui Wang5/11/26, 5:18โฏPMChemistry of Nuclear Fuel Cycle, Radiochemical Aspects of Nuclear Waste ManagementPoster
Bentonite colloids and phosphate exert both competing and complementary influences on U(VI) mobility in high-level radioactive waste repositories. Phosphate immobilizes uranium through precipitation, yet it also competes with pH-sensitive bentonite colloids for U(VI) adsorption. In this study, the interactions and cotransport of uranium with bentonite colloids and phosphate were examined using...
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Eva De Visser - Tรฝnovรก (NRG PALLAS)5/11/26, 5:21โฏPMChemistry of Nuclear Fuel Cycle, Radiochemical Aspects of Nuclear Waste ManagementPoster
NRG PALLAS conducts a comprehensive research program on molten salt reactor related materials, including both molten salts (both fluorides and chlorides) and structural materials. This experimental research includes irradiations in the HFR Petten, and therefore generates compositionally complex radioactive waste streams. Common for most of these streams is the fact that a suitable waste route...
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Zarina Salkenova (Helmholtz-Zentrum Dresden-Rossendorf e.V., Bautzner Landstraรe 400, 01328 Dresden, Germany)5/11/26, 5:24โฏPMChemistry of Nuclear Fuel Cycle, Radiochemical Aspects of Nuclear Waste ManagementPoster
Technetiumโ99 ($ ^{99}Tc $) is a radioactive fission product of the nuclear fuel cycle, with a long half-life (211,000 years). In oxidizing environments, $ ^{99}Tc $ is primarily present as the pertechnetate ion ($ Tc(VII)O_4 $), which is a highly soluble species. Due to its high mobility and long-term persistence, $ ^{99}Tc $ poses a significant environmental challenge and is treated...
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Hee Soo Kim (Korea Institute of Fusion Eenegy)5/11/26, 5:27โฏPMChemistry of Nuclear Fuel Cycle, Radiochemical Aspects of Nuclear Waste ManagementPoster
The KSTAR device is a superconducting nuclear fusion research facility that conducts deuterium + deuterium fusion experiments. The reaction occurs in a 50:50 ratio, as shown below:
- D + D โ He-3 (0.82 MeV) + n (2.45 MeV)
- D + D โ T-3 (1.01 MeV) + p (3.02 MeV)
The 2.45 MeV neutrons generated during this process irradiate surrounding devices, which then decay according to their physical...
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Liya Tomy5/11/26, 5:30โฏPMChemistry of Nuclear Fuel Cycle, Radiochemical Aspects of Nuclear Waste ManagementPoster
Modelling reactive transport (RT) in fractured crystalline rocks plays a crucial role in controlling the migration and retention of radionuclides in geological repositories. Conventional RT models typically describe the retardation of radionuclides using bulk parameters such as the distribution coefficient (Kd), which is assumed to depend primarily on average mineral composition. While this...
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Dr HUIGYEONG KIM5/11/26, 5:33โฏPMChemistry of Nuclear Fuel Cycle, Radiochemical Aspects of Nuclear Waste ManagementPoster
In the rapidly expanding global nuclear decommissioning market, the efficacious decontamination of metallic waste is pivotal for enhancing waste management economics and ensuring operational safety. Recent pilot-scale demonstrations at the Kori Unit 1 site have validated a synergistic processโintegrating ultrasonic cavitation with inorganic salt solutionsโwhich successfully reduced surface...
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Mr Boris Andris, Pavel Nykl5/11/26, 5:36โฏPMChemistry of Nuclear Fuel Cycle, Radiochemical Aspects of Nuclear Waste ManagementPoster
The decommissioning of Nuclear Power Plant A1 represents an atypical case due to the facilityโs history of accidents and its experimental character. These factors significantly complicate the decommissioning process compared with that of conventionally shut-down nuclear power plants. An illustrative example of this complexity is the handling of the contents of a vessel located beneath the...
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Mr Boris Andris, Pavel Nykl5/11/26, 5:39โฏPMChemistry of Nuclear Fuel Cycle, Radiochemical Aspects of Nuclear Waste ManagementPoster
The Nuclear Power Plant A1 is approaching the final stage of decommissioning with respect to legacy waste materials. The radioactive waste currently under treatment ranges from very low-level radioactive waste (VLLW) to intermediate-level radioactive waste (ILW). One category of ILW scheduled for near-term treatment is liquid waste stored in a manipulation and storage tank.
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This liquid waste... -
Sieglinde Holzknecht (HZDR)5/11/26, 5:42โฏPMChemistry of Nuclear Fuel Cycle, Radiochemical Aspects of Nuclear Waste ManagementPoster
Ensuring the long-term safety of nuclear waste repositories requires understanding the potential migration of radionuclides into the biosphere. Adsorption onto mineral surfaces, particularly phyllosilicates such as mica, plays a critical role in inhibiting this migration. However, mineral surfaces undergo surface reactions, such as dissolution, that modify surface nanotopography by changing...
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Jan Houzar (Department of Nuclear Chemistry, Faculty of Nuclear Sciences and Physical Engineering, Czech Technical University, 115 19 Prague, Czech Republic)5/11/26, 5:45โฏPMChemistry of Nuclear Fuel Cycle, Radiochemical Aspects of Nuclear Waste ManagementPoster
During operation of nuclear power plants, corrosion products are activated in the active zone, transported by the coolant, and contaminate the inner walls of primary circuit components by adsorption/incorporation into corrosion layers formed on the material. To ensure safe operation and reduce radiation hazard for working personnel, it is essential that decontamination is carried out on...
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Wei Tian (Chinese Academy of Sciences, Institute of modern Physics)5/11/26, 5:48โฏPMChemistry of Nuclear Fuel Cycle, Radiochemical Aspects of Nuclear Waste ManagementPoster
The rapid development of nuclear power will inevitably produce large amounts of spent nuclear fuels (SNF). In order to improve the utilization rate of uranium resources and achieve the sustainable development of nuclear energy, the closed nuclear fuel cycle must be developed accordingly. Sub-critical Accelerator Driven System (ADS) is a potential way to transmute the minor actinides (MAs) and...
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Mr Eimitsu Fujita (Japan Nuclear Fuel Chemical Analysis Co., Ltd.)5/11/26, 5:51โฏPMChemistry of Nuclear Fuel Cycle, Radiochemical Aspects of Nuclear Waste ManagementPoster
Based in Rokkasho Village, Aomori Prefecture, Japan, our company is a member of the Japan Nuclear Fuel Limited (JNFL) Group and specializes in various analytical and measurement services related to nuclear fuel cycle facilities. Rokkasho Village serves as a central hub for Japanโs nuclear fuel cycle operations. To contribute to the safe and stable operation of the reprocessing facilities...
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Masahiko Kubota (Tohoku University, Japan Nuclear Fuel Chemical Analysis co., Ltd)5/11/26, 5:54โฏPMChemistry of Nuclear Fuel Cycle, Radiochemical Aspects of Nuclear Waste ManagementPoster
High-level liquid radioactive waste (HLLW) generated during spent fuel reprocessing contains significant amounts of heat-generating nuclides such as Cs(I), Sr(II) and platinum group metals (PGMs), posing challenges for long-term waste management. Although extraction chromatography has been widely studied for nuclide separation, conventional approaches require multiple adsorbents with high...
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Lucie Bartl (Department of Nuclear Chemistry, Faculty of Nuclear Sciences and Physical Engineering, Czech Technical University in Prague, 115 19 Prague, Czech Republic)5/11/26, 5:57โฏPMChemistry of Nuclear Fuel Cycle, Radiochemical Aspects of Nuclear Waste ManagementPoster
Liquid wastes containing uranium compounds, such as uranyl acetate and nitrate, are generated in laboratory-scale nuclear research facilities and pose a significant management challenge, particularly in countries where centralized disposal systems for small-volume radioactive waste are not available. This study investigates the applicability of polysilicato-iron (PSI) coagulants for the...
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Barbora Vaลกkovรก (Czech Technical University in Prague)5/11/26, 6:00โฏPMChemistry of Nuclear Fuel Cycle, Radiochemical Aspects of Nuclear Waste ManagementPoster
The safe management of radioactive waste relies on engineered barrier systems (EBS), where cementitious materials are commonly used to limit radionuclide migration. However, their performance may be limited in the case of mobile anionic species. Geopolymers, as alkali-activated aluminosilicate materials, represent a promising alternative due to their chemical stability, low permeability, and...
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Marco Cologna (Joint Research Centre (JRC))5/12/26, 10:30โฏAMChemistry of Nuclear Fuel Cycle, Radiochemical Aspects of Nuclear Waste ManagementInvited
Spark plasma sintering (SPS) combines rapid heating, pulsed electric current, and uniaxial pressure to achieve dense ceramic bodies at markedly lower temperatures than conventional sintering, expanding the design space for microstructure, phase composition and dopant distribution.
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During the last decade, at the Joint Research Centre in Karlsruhe, we exploited the versatility of SPS to... -
Egor Iwaschko (Forschungszentrum Jรผlich GmbH)5/12/26, 11:00โฏAMChemistry of Nuclear Fuel Cycle, Radiochemical Aspects of Nuclear Waste ManagementVerbal
With the rising demand for more efficient energy sources the need for mixed oxide fuel (MOX) for nuclear energy production also increased, since it is a recycling product of spent UO2 fuel. MOX is a blend of UO2 and a variable amount of PuO2. Subsequently, the amount of MOX spent nuclear fuel (SNF) rises due to increased usage, in particular such with a higher burn-up history. Especially the...
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Abel Milena Pรฉrez (CIEMAT)5/12/26, 11:20โฏAMChemistry of Nuclear Fuel Cycle, Radiochemical Aspects of Nuclear Waste ManagementVerbal
Accident-Tolerant Fuels (ATFs) are a set of technologies that aim to provide enhanced failure tolerance and safety margins under abnormal operating conditions or transients in nuclear reactors. ATFs are a wide concept, comprising improvements in both the nuclear fuel pellet (made of UO2 in most of current operating reactors) and the cladding. Focusing on the pellet, evolutionary ATFs consist...
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Dr Jone M. Elorrieta (CIEMAT)5/12/26, 11:40โฏAMChemistry of Nuclear Fuel Cycle, Radiochemical Aspects of Nuclear Waste ManagementVerbal
The origin of pellet-cladding interaction (PCI), frequently occurring in spent nuclear fuel rods, lies in the simultaneous dimensional changes of the fuel pellet, which suffers irradiation- and heat-induced swelling, and the cladding, which experiences a creep-down due to the coolant overpressure. These opposed behaviours lead to the closure of the fuel-cladding gap and the eventual formation...
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Maud Zilbermann (Helmholtz-Zentrum Dresden-Rossendorf / Institute of Resource Ecology)5/13/26, 8:30โฏAMChemistry of Nuclear Fuel Cycle, Radiochemical Aspects of Nuclear Waste ManagementInvited
A growing number of nuclear power plants (NPPs) worldwide have been in operation for more than 40 years, and the need for efficient decommissioning strategies is ever-rising. As many nuclear countries lack a robust solution for long-term storage of radioactive waste, time and costs are crucial parameters when considering decommissioning strategies. Considerable amounts of structural waste are...
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Dr Vรกclava Havlovรก (International Atomic Energy Agency)5/13/26, 9:00โฏAMChemistry of Nuclear Fuel Cycle, Radiochemical Aspects of Nuclear Waste ManagementVerbal
Chemical conditions within geological environment contribute as one of the core aspects to the long term safety for a geological disposal facility (GDF). The siting context requires that the host rock provides geochemical stabilityโparticularly with respect to groundwater composition, mineralogical controls and gas related processesโto ensure that radionuclide mobility remains extremely...
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Javier Gimรฉnez (Universitat Politรจcnica de Catalunya (Barcelons, Spain))5/13/26, 9:20โฏAMChemistry of Nuclear Fuel Cycle, Radiochemical Aspects of Nuclear Waste ManagementVerbal
In a deep geological repository for spent nuclear fuel (SNF) it is assumed that after thousands of years groundwaters will reach the fuel inducing the release of a number of radionuclides coming from different parts of the fuel (gap, external grain boundaries, pre-oxidized fuel, internal grain boundaries, matrix, epsilon-particles) depending on the chemical conditions in the...
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Mr Khalifa Alsulami (Dalton Nuclear Institute, The University of Manchester)5/13/26, 9:40โฏAMChemistry of Nuclear Fuel Cycle, Radiochemical Aspects of Nuclear Waste ManagementVerbal
Metallic surfaces, including structural components and pipework, in nuclear plants are exposed โโto a wide range of temperature and chemical conditions. In these circumstances, contamination โof metallic surfaces with radioactive isotopes is a major โconcern, as these isotopes can adhere โto the surfaces, leading to carryover of radioactivity in the process solutions and to increased...
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Dr Susan Britz (GRS gGmbH)5/14/26, 8:30โฏAMChemistry of Nuclear Fuel Cycle, Radiochemical Aspects of Nuclear Waste ManagementInvited
The adsorption of radionuclides (RNs) onto mineral surfaces is a key retardation mechanism and plays a critical role in the long-term safety assessment of radioactive waste repositories. While numerous studies have investigated the sorption behavior of trivalent actinides (e.g. Am, Cu) and lanthanides (e.g. Eu, Y) on various minerals, most experiments rely on geochemically simplified systems,...
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Mr Vijay Kumar Saini (Helmholtz-Zentrum Dresden-Rossendorf e.V.)5/14/26, 9:00โฏAMChemistry of Nuclear Fuel Cycle, Radiochemical Aspects of Nuclear Waste ManagementVerbal
Technetium-99 ($^{99}$Tc) is a long-lived fission product (tยฝ = 2.13 ร 10โต a) with high yield (~6%) that poses environmental concerns due to its complex redox chemistry.[1] Under oxic conditions, it exists as the highly mobile pertechnetate anion ($\mathrm{TcO_4^-}$), whereas under reducing conditions, $\mathrm{Tc^{IV}}$ is less mobile and readily sorbs onto mineral surfaces or precipitates as...
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Dr Christian Schreinemachers (Forschungszentrum Jรผlich GmbH, Institute of Fusion Energy and Nuclear Waste Management, IFN-2: Nuclear Waste Management)5/14/26, 9:20โฏAMChemistry of Nuclear Fuel Cycle, Radiochemical Aspects of Nuclear Waste ManagementVerbal
In several countries, direct disposal of spent nuclear fuel (SNF) in a deep geological repository (DGR) is the preferred waste management option. Understanding SNF corrosion if the waste canister is breached and the fuel comes into contact with groundwater is required to evaluate the long-term safety of a DGR over an assessment timeframe of up to one million years. While various studies have...
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Stephan Hilpmann (Helmholtz-Zentrum Dresden-Rossendorf, Institute of Resource Ecology)5/14/26, 9:40โฏAMChemistry of Nuclear Fuel Cycle, Radiochemical Aspects of Nuclear Waste ManagementVerbal
Understanding the mechanisms governing radionuclide transport is essential for assessing the long-term safety of deep geological repositories for radioactive waste. In many countries, including Germany, crystalline rock formations are considered potential host rocks due to their low permeability and structural stability. Radionuclide retention in such systems relies strongly on geochemical...
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Dr SAJID IQBAL (Korea Advanced Institute of Science and Technology (KAIST))5/15/26, 8:30โฏAMChemistry of Nuclear Fuel Cycle, Radiochemical Aspects of Nuclear Waste ManagementVerbal
Geopolymers have emerged as promising low-carbon cementitious materials for the solidification of complex radioactive waste streams, offering high mechanical integrity and chemical durability. Their low calcium content, distinct aluminosilicate chemistry, and low bound-water content render them inherently resistant to thermal, chemical, and irradiation-induced degradation. In parallel,...
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Mr Fabio Fattori (Politecnico di Milano)5/15/26, 8:48โฏAMChemistry of Nuclear Fuel Cycle, Radiochemical Aspects of Nuclear Waste ManagementVerbal
Abstract:
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A crucial step within radioactive waste (RW) management is the conditioning of RWs inside a stable and durable waste form, capable of guaranteeing the long-term confinement of radionuclides. Geopolymers are promising alternatives to traditional cementitious materials for the conditioning of low-to-intermediate level waste, especially for challenging RWs, e.g. those containing high... -
Ms Elizaveta Artiushova (PSI & UniBE)5/15/26, 9:06โฏAMChemistry of Nuclear Fuel Cycle, Radiochemical Aspects of Nuclear Waste ManagementVerbal
This work addresses the selective removal of Co from large volumes of aqueous waste generated during nuclear power plant (NPP) operation. Efficient removal of Co-60, a long-lived ฮณ-emitting radionuclide, can reduce occupational exposure and complement conventional treatment routes such as evaporation.
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Phosphate-based inorganic sorbents are attractive for radionuclide capture due to their... -
Caroline Bรถrner (Helmholtz-Zentrum Dresden-Rossendorf)5/15/26, 9:24โฏAMRadionuclides in the Environment, RadioecologyVerbal
Technetium-99 (99Tc) is the most common isotope of technetium. It is a pure beta minus emitter with a long half live (213 000 years), and it is of great relevance in radioecology, due to its high mobility and long-term persistence in the environment. 99Tc is a major fission product from 235U and 239Pu, and, thus, present in high-level radioactive waste. Additionally, the widespread medical use...
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Marek Hupian (Department of Nuclear Chemistry, Faculty of Natural Sciences, Comenius University Bratislava)5/15/26, 9:42โฏAMChemistry of Nuclear Fuel Cycle, Radiochemical Aspects of Nuclear Waste ManagementVerbal
The sorption of radionuclides from aqueous systems, investigated using radiotracer techniques, is essential for understanding radionuclideโsurface interactions relevant to radioactive waste management and environmental radiochemistry. The Laboratory of Sorption Methods, Speciation and Radionuclide Migration at the Department of Nuclear Chemistry, Faculty of Natural Sciences, Comenius...
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