RadChem 2014

Session

Radionuclides in the Environment, Radioecology 5

RER-5

16 May 2014, 13:30

Casino Conference Centre

Conveners

Radionuclides in the Environment, Radioecology 5

• Ioannis Pashalidis (Department of Chemistry, University of Cyprus)
• Jerzy-Wojciech Mietelski (The Henryk Niewodniczanski Institute of Nuclear Physics, Polish Academy of Sciences (IFJ PAN))

Description

(session dedicated to the memory of prof. Petr Beneš)

123. Properties and applications of nanoscale actinide cage clusters

Prof. Peter Burns (University of Notre Dame)

16/05/2014, 13:30

Radionuclides in the Environment, Radioecology

Invited

Uranyl peroxide cage clusters self-assemble from aqueous solution under ambient conditions. To date, we have isolated more than 80 distinct clusters that differ in the number of uranyl ions, size, and topology. These clusters contain from 18 to 124 uranyl ions, and are from 1.5 to 4 nm in diameter. Most are readily soluble in aqueous solution. Although peroxide bridges between uranyl ions are...

313. Nanomaterials for sorption of critical radionuclides

Mr Vojtěch Brynych (ÚJV Řež, a. s.)

16/05/2014, 14:00

Radionuclides in the Environment, Radioecology

Verbal

Any activity that produces or uses radioactive materials generates radioactive waste. Disposal of radioactive waste is a complex issue, not only because of the nature of the waste, but also because the need to solve the problem not to burden future generations. Retention processes of key important radionuclides were studied within this study. Cesium is one of the most important nuclides....

307. Digital coincidence spectrometer with two HPGe detectors constructed at IFJ PAN – design, construction and early results

Prof. Jerzy-Wojciech Mietelski (The Henryk Niewodniczanski Institute of Nuclear Physics, Polish Academy of Sciences (IFJ PAN))

16/05/2014, 14:15

Radionuclides in the Environment, Radioecology

Verbal

The use of digital coincidence opens new perspectives for low background gamma rays measurements. The basic idea is that two detectors are collecting independently gamma spectra, but spectrum is not stored as one dimensioned array of counts but two-dimensional array where data on each registered photon energy is registered together with information on its arrival with several nanoseconds...

116. Separation of Uranium from Drinking Water in the Czech Republic

Mr Jan Krmela (ÚJV Řež, a.s.)

16/05/2014, 14:30

Radionuclides in the Environment, Radioecology

Verbal

Natural ground water used for the preparation of drinking water contains a number of cations, anions, elements and other substances depending on the bedrock composition (Ca, Mg, Fe, Mn, heavy metals, radioactive elements, arsenic, chromium, carbonates, sulfates, phosphates, silicates, fulvic and humic acids etc.). Information about composition of drinking water is important to comply with all...

36. Influence of the alpha radiation on the UO2 dissolution at high pH cementitious water.

Dr Thierry MENNECART (SCK-CEN)

16/05/2014, 14:45

Radionuclides in the Environment, Radioecology

Verbal

Since 2004, the supercontainer design has been selected by the Belgian authority for the management of the nuclear waste (NIRAS/ONDRAF) as the preferred new reference design for disposal of High Level Waste and Spent Fuel. This design is based on a buffer and backfill materials of Ordinary Portland Cement (OPC). In this supercontainer, the spent fuel will be surrounded by a 30 mm thick...