Results from Phase 1, 2, and 3 Studies on Nepheline Formation in High-Level Waste Glasses Containing High Concentrations of Alumina
- Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
The composition of Hanford high-level waste (HLW) is dominated by relatively high concentrations of Al2O3. A major constraint limiting the waste loading of high-Al2O3 glasses is nepheline (nominally NaAlSiO4) formation upon slow cooling of HLW glasses after melts are poured into canisters. The model currently planned to be used at the Hanford Tank Waste Treatment and Immobilization Plant (WTP) for avoiding nepheline formation is too conservative and drastically limits waste loading. To increase loadings of high-Al2O3 waste at the WTP, the effects of glass composition on glass properties must be determined and glass property-composition models must be developed. An important task of this effort is determining the impacts of glass composition on nepheline formation and the effects of nepheline on Product Consistency Test (PCT) response.
- Research Organization:
- Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AC05-76RL01830
- OSTI ID:
- 1783293
- Report Number(s):
- PNNL-26057 Rev 0.0
- Country of Publication:
- United States
- Language:
- English
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