Effect of glass composition on surface tension, viscosity, and redox equilibria of initial DWPF (Defense Waste Processing Facility) glass
Technical Report
·
OSTI ID:6975286
A statistically-designed mixture study was undertaken to determine the effect that compositional variation in simulated Savannah River nuclear waste glass has upon melt surface tension, viscosity and Fe/sup 2 +//Fe/sup 3 +/ equilibria. In each case, linear models adequately predicted these properties from the SiO/sub 2/, B/sub 2/O/sub 3/, Na/sub 2/O, Li/sub 2/O and K/sub 2/O contents of the borosilicate glass. Surface tension at 1150/degree/C increases with increasing SiO/sub 2/ or Li/sub 2/O content, viscosity increases with increasing SiO/sub 2/ content and the Fe/sup 2 +//Fe/sup 3 +/ ratio increases with additions of SiO/sub 2/, B/sub 2/O/sub 3/ or Li/sub 2/O at constant temperature and partial pressure of oxygen. Addition of the other oxides decreases the values of these properties. Surface tension was additionally found to decrease under more oxidizing melt conditions and with water vapor present in the atmosphere. The Fe/sup 2 +//Fe/sup 3 +/ ratio only changed by 0.05 over the range of compositions tested, which suggests that compositional variation in the vitrification process will likely not adversely affect its use as a monitor of the glass oxidation state. 18 refs., 6 figs., 3 tabs.
- Research Organization:
- Savannah River Lab., Aiken, SC (USA)
- DOE Contract Number:
- AC09-76SR00001
- OSTI ID:
- 6975286
- Report Number(s):
- DPST-86-740; ON: DE88015687
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
052001 -- Nuclear Fuels-- Waste Processing
12 MANAGEMENT OF RADIOACTIVE AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES
36 MATERIALS SCIENCE
360603* -- Materials-- Properties
BOROSILICATE GLASS
CHEMICAL COMPOSITION
ELEMENTS
EQUATIONS
GLASS
HIGH-LEVEL RADIOACTIVE WASTES
IRON
MANAGEMENT
MATERIALS
METALS
NATIONAL ORGANIZATIONS
RADIOACTIVE MATERIALS
RADIOACTIVE WASTE DISPOSAL
RADIOACTIVE WASTES
SAVANNAH RIVER PLANT
SIMULATION
SURFACE PROPERTIES
SURFACE TENSION
TRANSITION ELEMENTS
US AEC
US DOE
US ERDA
US ORGANIZATIONS
VARIATIONS
VISCOSITY
WASTE DISPOSAL
WASTE MANAGEMENT
WASTES
12 MANAGEMENT OF RADIOACTIVE AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES
36 MATERIALS SCIENCE
360603* -- Materials-- Properties
BOROSILICATE GLASS
CHEMICAL COMPOSITION
ELEMENTS
EQUATIONS
GLASS
HIGH-LEVEL RADIOACTIVE WASTES
IRON
MANAGEMENT
MATERIALS
METALS
NATIONAL ORGANIZATIONS
RADIOACTIVE MATERIALS
RADIOACTIVE WASTE DISPOSAL
RADIOACTIVE WASTES
SAVANNAH RIVER PLANT
SIMULATION
SURFACE PROPERTIES
SURFACE TENSION
TRANSITION ELEMENTS
US AEC
US DOE
US ERDA
US ORGANIZATIONS
VARIATIONS
VISCOSITY
WASTE DISPOSAL
WASTE MANAGEMENT
WASTES