Applicability of V{sub 2}O{sub 5}-P{sub 2}O{sub 5} glass system for low-temperature vitrification
Book
·
OSTI ID:572041
- Hitachi Ltd., Ibaraki (Japan)
The V{sub 2}O{sub 5}-P{sub 2}O{sub 5} glass system (vanadate glass) has been developed to provide low temperature vitrification of radioactive waste without volatilization of radionuclides. The dissolution behavior of vanadate glass was determined from the results of the MCC-1 static leach test at 70 C using deionized water, cement-saturated alkaline water, and cement-saturated alkaline water with 3% NaCl. The solubility of vanadate glass was remarkably reduced by the addition of Sb{sub 2}O{sub 3} to the glass. It was also lowered in the cement-saturated water due to formation of a precipitation layer. Although the presence of NaCl in the solution accelerated the dissolution of vanadate glass, the addition of alkaline earth metal oxide to the glass gave a dissolution rate three orders lower than non-additive vanadate glass. The results of leach tests using simulated vitrified waste form containing 5 mol% of Cs{sub 2}O and SrO showed there was a possibility of fixing Cs and Sr into the glass structure.
- OSTI ID:
- 572041
- Report Number(s):
- CONF-961202--
- Country of Publication:
- United States
- Language:
- English
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