|About this Abstract
||Materials Science & Technology 2012
||Materials Issues in Nuclear Waste Management in the 21st Century
||Radionuclide Behavior and Geochemistry in Boom Clay after Geological Disposal of High-Level Waste
||Sonia Salah, Norbert Maes, Pierre Van Iseghem, Christophe Bruggeman, Lian Wang, Dejun Liu
|On-Site Speaker (Planned)
The Boom Clay (BC) formation represents the reference host rock for the geological disposal of high-level and long-lived radioactive waste (HLW) in Belgium. The Belgian concept (i.e. Supercontainer concept) for the geological disposal of HLW considers the installation of a multi-barrier repository system. The latter typically comprises the natural barrier, provided by the host rock and its surroundings (aquifers, biosphere), as well as the engineered barrier system. Predicting the retention/migration behaviour of the safety relevant radionuclides (e.g. Cs(I), Sr(II), Am(III), Th(IV)) over long time scales is the main aim of performance assessment (PA) calculations. A sound understanding of the underlying geochemical processes and mechanisms is prerequisite to derive consistent sets of parameters required for such calculations and safety evaluations. The lecture aims at giving an overview of the main research activities performed at SCK•CEN related to the radionuclide retention/migration behaviour, involving experimental studies, geochemical as well as transport modelling.