Use of DWPF redox measurement technique on glasses from West Valley Nuclear Fuel Services Demonstration Project
Liquid high-level nuclear waste will be immobilized at the Savannah River Site (SRS) by vitrification in borosilicate glass in the Defense Waste Processing Facility (DWPF). A similar vitrification facility exists at the West Valley Nuclear Fuel Services. In both of these facilities, control of the oxidation/reduction (redox) equilibrium in the glass melter is critical for processing of the nuclear waste. Redox can be determined by measuring the ratio of ferrous to ferric ions in the glass melt. A colorimetric procedure has been developed for the DWPF which has been shown to give rapid and reliable analytical results. This colorimetric technique has been shown to measure the Fe{sup 2+} component of glasses more accurately than other existing redox measurement methods. The DWPF redox technique was applied to a series of six glasses taken from the West Valley melter during a transient melter excursion. This excursion caused the glasses to become progressively more reducing with time. Application of the DWPF redox technique to these glasses correctly indicated the redox trends with a higher precision and with more accuracy than the West Valley wet chemical method and/or Alfred University's Mossbauer method. 1 fig., 18 refs.
- Research Organization:
- Savannah River Site (SRS), Aiken, SC (United States)
- Sponsoring Organization:
- USDOE; USDOE, Washington, DC (USA)
- DOE Contract Number:
- AC09-89SR18035
- OSTI ID:
- 6017278
- Report Number(s):
- WSRC-TR-90-527-Rev.1; ON: DE91009295
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
HIGH-LEVEL RADIOACTIVE WASTES
VITRIFICATION
IRON IONS
REDOX REACTIONS
PROCESS CONTROL
ABSORPTION SPECTROSCOPY
AIR
AMMONIUM COMPOUNDS
BOROSILICATE GLASS
CERAMIC MELTERS
EQUILIBRIUM
HYDROFLUORIC ACID
MEASURING METHODS
RADIOACTIVE WASTE FACILITIES
SAVANNAH RIVER PLANT
STABILIZATION
VANADATES
CHARGED PARTICLES
CHEMICAL REACTIONS
CONTROL
ELECTRIC FURNACES
FLUIDS
FURNACES
GASES
GLASS
HYDROGEN COMPOUNDS
INORGANIC ACIDS
IONS
MATERIALS
NATIONAL ORGANIZATIONS
NUCLEAR FACILITIES
OXYGEN COMPOUNDS
RADIOACTIVE MATERIALS
RADIOACTIVE WASTES
SPECTROSCOPY
TRANSITION ELEMENT COMPOUNDS
US AEC
US DOE
US ERDA
US ORGANIZATIONS
VANADIUM COMPOUNDS
WASTES
052001* - Nuclear Fuels- Waste Processing
440102 - Radiation Instrumentation- Radiation Dosemeters