RadChem 2014

Session

Chemistry of Nuclear Fuel Cycle 2

NFC-2

13 May 2014, 08:30

Casino Conference Centre

Conveners

Chemistry of Nuclear Fuel Cycle 2

• Nicholas Evans (Loughborough University)
• Katja Schmeide (Helmholtz-Zentrum Dresden-Rossendorf, Institute of Resource Ecology)

Description

(1st ASGARD International Workshop)

378. Humic colloid-associated migration of trivalent radionuclides in an argillaceous formation

Dr Christophe Bruggeman (Belgian Nuclear Research Centre SCK•CEN)

13/05/2014, 08:30

Chemistry of Nuclear Fuel Cycle / 1st ASGARD International Workshop

Invited

Humic colloid-associated migration of trivalent radionuclides in an argillaceous formation C.BRUGGEMAN1*, N.MAES1, J.GOVAERTS1, S.SALAH1, L.WANG1, M.VAN GOMPEL1, S.BRASSINNES2 1Environment, Health and Safety Institute (EHS), SCK•CEN, Boeretang 200, B-2400 Mol, Belgium (*correspondence: cbruggem@sckcen.be) 2ONDRAF/NIRAS, Kunstlaan 14, 1210 Brussel, Belgium (s.brassinnes@nirond.be) ...

322. Cesium uptake by Ca/Mg bentonite: evaluation of sorpion experiments by a multicomponent two-site ion-exchange model

Dr Dušan Vopálka (Department of Nuclear Chemistry, Czech Technical University in Prague, Czech Republic)

13/05/2014, 09:00

Chemistry of Nuclear Fuel Cycle / 1st ASGARD International Workshop

Verbal

Understanding the migration processes in the near-field of the geological disposal of nuclear wastes at the basic level can help to develop models, which may be used in transport codes that can predict the migration of radioactive contaminants in the field scale. Cesium is well adsorbed by clay minerals and many studies concerning adsorption of cesium on different types of clay minerals have...

340. Speciation of technetium after sorption and diffusion in Opalinus Clay

Ms Maria Lübke (Institute of Nuclear Chemistry; Johannes Gutenberg University Mainz (Germany))

13/05/2014, 09:15

Chemistry of Nuclear Fuel Cycle / 1st ASGARD International Workshop

Verbal

The long-lived radioactive isotope technetium-99 (99Tc, t1/2= 2.14•105 a) is a fission product of 235U and 239Pu and can be released to the environment from nuclear facilities, high-level radioactive waste repositories or as a result from nuclear weapon testing. Its geochemistry is dominated by the very mobile and soluble pertechnetate anion (TcO4-) under oxic, and a less mobile and less...

173. Ruprechtov natural analogue site: summary of the real system behaviour

Radek Červinka (ÚJV Řež, a. s., Czech Republic)

13/05/2014, 09:30

Chemistry of Nuclear Fuel Cycle / 1st ASGARD International Workshop

Verbal

Deep geological repositories (DGR) for the final disposal of spent nuclear fuel and high-level radioactive waste are primarily based on a multi-barrier concepts, consisting of a host rock as a natural geological barrier and an engineered barrier-system. Detailed investigations of suitable geological analogues may lead to a better understanding of the complex interrelations between transport...

37. Numerical analysis of transport and retardation for cesium in crushed granite using multi-stage advection-dispersion column experiments

Dr Chuan-Pin Lee (Department of Earth Sciences, National Cheng Kung University, Tainan, Taiwan)

13/05/2014, 09:45

Chemistry of Nuclear Fuel Cycle / 1st ASGARD International Workshop

Verbal

In order to assess the safety of an underground repository for high-level radioactive waste (HLW), reactive transport models designed to evaluate the fate and transport of radionuclides must be established based on experimental observation using both laboratory and on-site geological analyses. In this study, a systematic analysis of cesium (Cs) through crushed granite (0.297 - 0.840 mm) was...