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Modeling of Near Field Actinide Concentrations in Radioactive Waste Repositories in Salt Formations: Effect of Buffer Materials

Published online by Cambridge University Press:  21 March 2011

W. Schuessler ,
B. Kienzler ,
S. Wilhelm ,
V. Neck  and
J.I. Kim
W. Schuessler
Affiliation:
Institut für Nukleare Entsorgung, Forschungszentrum Karlsruhe Postfach 3640, D-76021 Karlsruhe, GermanyEmail: [email protected]
B. Kienzler
Affiliation:
Institut für Nukleare Entsorgung, Forschungszentrum Karlsruhe Postfach 3640, D-76021 Karlsruhe, GermanyEmail: [email protected]
S. Wilhelm
Affiliation:
Institut für Nukleare Entsorgung, Forschungszentrum Karlsruhe Postfach 3640, D-76021 Karlsruhe, GermanyEmail: [email protected]
V. Neck
Affiliation:
Institut für Nukleare Entsorgung, Forschungszentrum Karlsruhe Postfach 3640, D-76021 Karlsruhe, GermanyEmail: [email protected]
J.I. Kim
Affiliation:
Institut für Nukleare Entsorgung, Forschungszentrum Karlsruhe Postfach 3640, D-76021 Karlsruhe, GermanyEmail: [email protected]
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Abstract

Engineered barrier systems are designed to reduce the near field actinide concentrations in case of water penetration into a repository. In this paper, the influence of buffer materials, such as MgO/CaO and clays, on the solubilities of Am, Np, Pu, and U is studied. The analysis is performed for low level cemented waste forms in a rock salt formation in contact with MgCl2 saturated salt brine (Q-brine).

The evolution of the geochemical milieu by cement corrosion is calculated using reaction path modeling supported by the code EQ3/6. The influence of different buffer materials is analyzed with respect to their impact on the solution chemistry and corresponding actinide concentrations.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 663: Symposium – Scientific Basis for Nuclear Waste management XXIV , 2000 , 791
Copyright
Copyright © Materials Research Society 2001

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References

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