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Modelling Studies of the Sorption of Uranium and Plutonium in the far Field of A Nuclear Waste Repository

  • K.A. Bond (a1), A. Haworth (a1), S.M. Sharland (a1), A.C. Smith (a1) and C.J. Tweed (a1)...

Abstract

Models of the transport of sorbing radioelements through geological materials have been developed. These models couple a surface-complexation model of sorption processes with transport simulations in the CHEQMATE code. The chemical model has been shown to reproduce trends observed in batch sorption experiments. This approach may ultimately be used to investigate possible limitations to the use of models using simple Kds in repository safety-assessments. The main aim of the study reported in this paper is to increase confidence in the use of the coupled models. Simulations of through-diffusion experiments of uranium with London clay and plutonium with sandstone are presented. In both cases gluconate is present, as a simulant of organic degradation products of cellulose likely to be present in a low- or intermediate-level waste repository.

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Modelling Studies of the Sorption of Uranium and Plutonium in the far Field of A Nuclear Waste Repository

  • K.A. Bond (a1), A. Haworth (a1), S.M. Sharland (a1), A.C. Smith (a1) and C.J. Tweed (a1)...

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