Long-term sequential migration experiments with Tc, Cm, Np, Pu and Pa through Boom Clay cores were used to interpret organic matter (OM) linked radionuclide (RN) transport. Interaction of these elements with mobile OM results in an enhanced transport, as stabilised RN-OM species. However, this interaction is known to be governed by association/dissociation kinetics. The stability of these complexes are therefore a key factor for describing the mobility of these RN-OM species. To describe the RN-OM linked transport for Safety/Performance Assessment evaluations, a consistent phenomenological model is proposed that accounts for the RN-OM transport undergoing slow dissociation and sorption of both RN-OM and RN to the solid phase.
|Physics and Chemistry of the Earth
|Published - Dec 2011
|Clays in Natural and Engineered Barriers for Radioactive Waste Confinement - ANDRA, Nantes
Duration: 29 Mar 2010 → 1 Apr 2010