Dissolution of Synroc in deionized water at 150 C
- Australian Nuclear Science and Technology Organisation, Menai, New South Wales (Australia). Materials Div.
Synroc containing 20 wt% simulated high level waste (HLW) was subjected to two sets of leach tests at 150 C where the leachant was and was not replaced during the test (replacement and non-replacement testing). The leachant was a KH-phthalate buffered solution (pH 4.2). Samples were characterized before and after leach testing using SEM, AEM and SIMS. Elemental concentrations in leachates were measured using ICP-MS. In concert with the findings of (1) a dissolution study of perovskite in a flowing leachant and (2) a previous Synroc dissolution study (wherein Synroc containing 10 wt% simulated HLW was subjected to periodic replacement, leach testing in deionized water at 150 C), the results of this study show that when the leachant replacement frequency is varied from 7 d to the duration of the test, there is no effect on leach rate or leaching mechanisms.
- OSTI ID:
- 572079
- Report Number(s):
- CONF-961202--
- Country of Publication:
- United States
- Language:
- English
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