Comparison of sodium zirconium phosphate-structured HLW forms and synroc for high-level nuclear waste immobilization
- Argonne National Lab., IL (United States)
- ANSTO, Menai (Australia). Materials Division
The incorporation of (a) Cs/Sr as simulated heat-generating isotopes contained in Purex reprocessing waste, (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 of that for Synroc-C, as measured by 7-day MCC-1 tests at 90{degrees}C. The dissolution behavior 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. 19 refs., 4 figs., 3 tabs.
- Research Organization:
- Argonne National Lab., IL (United States)
- DOE Contract Number:
- W-31109-ENG-38
- OSTI ID:
- 475658
- Report Number(s):
- ANL/CMT/CP--92198; CONF-961202--87; ON: DE97003248
- Country of Publication:
- United States
- Language:
- English
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