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Coupling of Chemical Processes in the Near Field

Published online by Cambridge University Press:  21 March 2011

B. Grambow  and
E. Giffaut
B. Grambow
Affiliation:
SUBATECH, Nantes (France)
E. Giffaut
Affiliation:
Andra, Chatenay Malabry (France)
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Abstract

Coupled modelling has been performed using geochemical/transport codes and radiolysis models to describe the chemical evolution of the waste forms “high-level waste glass” and “spent nuclear fuel” together with its waste package and engineered barrier surroundings. Near field processes considered include container corrosion, hydrogen generation, mass transfer for radionuclides and other waste matrix components in corrosion products and buffer materials, geochemistry of near field solution chemistry, sorption of radionuclides on surface sites in the nano-sized pore space of near field materials and the radiolytic decomposition of pore water. The rate limiting steps in waste form dissolution and secondary phase formation mechanism and the associated radionuclide mobilisation chemistry (solubility, solid solution formation, speciation, redox stability) are strongly influenced by the near field constraints.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 932: Symposium – Scientific Basis for Nuclear Waste Management XXIX , 2006 , 119.1
Copyright
Copyright © Materials Research Society 2006

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