Volatility of a zinc borosilicate glass containing simulated high-level radioactive waste. [800 to 1200/sup 0/C]
Volatilities of a zinc borosilicate glass containing 25 wt. percent simulated high-level radioactive waste calcine and of the calcine itself were determined in the range 800 to 1200/sup 0/C. The fission products Rb, Mo, Ru, Te, and Cs were detected in the vapor from both the glass and the calcine. In general, the vaporization rates were lower from the glass with the exception of Rb and Cs at 1200/sup 0/C, where the rates were about the same from the glass as from the calcine. Furthermore, slopes of Arrhenius plots for Rb and Cs were higher for the glass indicating that more of these elements would be lost from the glass above 1200/sup 0/C than from the calcine. Vaporization of all volatile elements from the glass seems to be dominated by a single mechanism; thus, vapor composition over the glass is essentially temperature independent. Several mechanisms apply to vaporization of the various elements from the calcine. Gross weight-loss from the glass and calcine appears to be surface and diffusion controlled, respectively.
- Research Organization:
- Battelle Pacific Northwest Labs., Richland, WA (United States)
- DOE Contract Number:
- E(45-1)-1830
- OSTI ID:
- 7341867
- Report Number(s):
- BNWL-2111; TRN: 77-001911
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
FISSION PRODUCTS
EVAPORATION
RADIOACTIVE WASTE PROCESSING
SOLIDIFICATION
RADIOACTIVE WASTES
VOLATILITY
BORON
BORON SILICATES
CESIUM
GLASS
MOLYBDENUM
POTASSIUM
RUBIDIUM
SODIUM
TELLURIUM
TEMPERATURE DEPENDENCE
VERY HIGH TEMPERATURE
ZINC COMPOUNDS
ALKALI METALS
BORON COMPOUNDS
ELEMENTS
ISOTOPES
MANAGEMENT
METALS
OXYGEN COMPOUNDS
PHASE TRANSFORMATIONS
PROCESSING
RADIOACTIVE MATERIALS
REFRACTORY METALS
SEMIMETALS
SILICATES
SILICON COMPOUNDS
TRANSITION ELEMENTS
WASTE MANAGEMENT
WASTE PROCESSING
WASTES
052001* - Nuclear Fuels- Waste Processing