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Comparison of Sodium Zirconium Phosphate-Structured HLW Forms and Synroc for High-Level Nuclear Waste Immobilization

Published online by Cambridge University Press:  03 September 2012

V. N. Zyryanov  and
E. R. Vance
V. N. Zyryanov
Affiliation:
Chemical Technology Division, Argonne National Laboratory, 9700 South Cass Avenue, Argonne, Illinois 60439–4837, zyryanov@cmt.anl.gov
E. R. Vance
Affiliation:
Materials Division, ANSTO, Menai, N.S.W. 2234, Australia.
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Abstract

The incorporation of (a) Cs and Sr as; (b) simulated actinides, and (c) simulated Purex waste in sodium zirconium phosphate (NZP) has been studied. The samples were prepared by sintering, by hot pressing and by hot isostatic pressing in metal bellows containers. The short-term chemical durability of the phosphate-based material containing Purex waste was within an order of magnitude ofthat for Synroc-C, as measured by 7-day MCC-1 tests at 90°C. The dissolution behaviour showed evidence of re-precipitation phenomena, even after times as short as 28 days. Potential for improvement of NZP-based ceramics for HLW management is discussed.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 465: Symposium II – Scienfific Basis for Nuclear Waste Management XX , 1996 , 409
Copyright
Copyright © Materials Research Society 1997

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References

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