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

Author:

Schuessler W.,Kienzler B.,Wilhelm S.,Neck V.,Kim J.I.

Abstract

ABSTRACTEngineered 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.

Publisher

Springer Science and Business Media LLC

Subject

General Engineering

Reference16 articles.

1. 15. Neck V. , Fanghänel T. , and Kim J. I. , Institut für Nukleare Entsorgungstechnik, Forschungszentrum Karlsruhe, FZKA 6340, (1999).

2. 14. Neck V. , Fanghänel T. , and Kim J. I. , Institut für Nukleare Entsorgungstechnik, Forschungszentrum Karlsruhe, FZKA 6110, (1998).

3. Long-Term Leaching Experiments of Full-Scale Cemented Waste Forms: Experiments and Modeling

4. Geochemical assessement of actinide isolation in a German salt repository environment

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