Defense waste vitrification studies during FY-1981. Summary report
- comp.
Both simulated alkaline defense wastes and simulated acidic defense wastes (formed by treating alkaline waste with formic acid) were successfully vitrified in direct liquid-fed melter experiments. The vitrification process was improved while using the formate-treated waste. Leach resistance was essentially the same. Off-gas entrainment was the primary mechanism for material exiting the melter. When formate waste was vitrified, the flow behavior of the off gas from the melter changed dramatically from an erratic surging behavior to a more quiet, even flow. Hydrogen and CO were detectable while processing formate feed; however, levels exceeding the flamability limits in air were never approached. Two types of melter operation were tested during the year, one involving boost power. Several boosting methods located within the melter plenum were tested. When lid heating was being used, water spray cooling in the off gas was required. Countercurrent spray cooling was more effective than cocurrent spray cooling. Materials of construction for the off-gas system were examined. Inconel-690 is preferred in the plenum area. Inspection of the pilot-scale melter found that corrosion of the K-3 refractory and Inconel-690 electrodes was minimal. An overheating incident occurred with the LFCM in which glass temperatures up to 1480/sup 0/C were experienced. Lab-scale vitrification tests to study mercury behavior were also completed this year. 53 figures, 63 tables.
- Research Organization:
- Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
- DOE Contract Number:
- AC06-76RL01830
- OSTI ID:
- 6764663
- Report Number(s):
- PNL-4366; ON: DE83001692
- Resource Relation:
- Other Information: Portions of document are illegible
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
RADIOACTIVE WASTE PROCESSING
VITRIFICATION
COOLING
CORROSION
DEGASSING
ELECTRODES
EXPERIMENTAL DATA
FORMATES
INCONEL 690
MATERIALS TESTING
MELTING
MERCURY
OFF-GAS SYSTEMS
SIMULATION
ALLOYS
CARBOXYLIC ACID SALTS
CHEMICAL REACTIONS
CHROMIUM ALLOYS
DATA
ELEMENTS
INCONEL ALLOYS
INFORMATION
MANAGEMENT
METALS
NICKEL ALLOYS
NICKEL BASE ALLOYS
NUMERICAL DATA
PHASE TRANSFORMATIONS
PROCESSING
TESTING
WASTE MANAGEMENT
WASTE PROCESSING
052001* - Nuclear Fuels- Waste Processing