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Title: Laboratory-scale vitrification and leaching of Hanford high-level waste for the purpose of simulant and glass property models validation

Laboratory-scale vitrification and leaching of Hanford high-level waste for the purpose of simulant and glass property models validation The Hanford Waste Vitrification Plant (HWVP) is being built to process the high-level and TRU waste into canistered glass logs for disposal in a national repository. Testing programs have been established within the Project to verify process technology using simulated waste. A parallel testing program with actual radioactive waste is being performed to confirm the validity of using simulates and glass property models for waste form qualification and process testing. The first feed type to be processed by and the first to be tested on a laboratory-scale is pretreated neutralized current acid waste (NCAW). The NCAW is a neutralized high-level waste stream generated from the reprocessing of irradiated nuclear fuel in the Plutonium and Uranium Extraction (PUREX) Plant at Hanford. As part of the fuel reprocessing, the high-level waste generated in PUREX was denitrated with sugar to form current acid waste (CAW). Sodium hydroxide and sodium nitrite were added to the CAW to minimize corrosion in the tanks, thus yielding neutralized CAW. The NCAW contains small amounts of plutonium, fission products from the irradiated fuel, stainless steel corrosion products, and iron and sulfate from the ferrous sulfamate reductant used in the PUREX process. This paper will discuss the results and more » status of the laboratory-scale radioactive testing. « less
Authors: ; ;
Publication Date:
OSTI Identifier:OSTI ID: 6510132
Report Number(s):PNL-SA-21885; CONF-930205--49
ON: DE93010168
DOE Contract Number:AC06-76RL01830
Resource Type:Conference
Resource Relation:Conference: Waste management '93, Tucson, AZ (United States), 28 Feb - 4 Mar 1993
Research Org:Pacific Northwest Lab., Richland, WA (United States)
Sponsoring Org:DOE; USDOE, Washington, DC (United States)
Country of Publication:United States
Language:English
Subject: 12 MANAGEMENT OF RADIOACTIVE AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES; GLASS; LEACHING; HIGH-LEVEL RADIOACTIVE WASTES; VITRIFICATION; SLURRIES; SIMULATION; CHEMICAL COMPOSITION; CHEMICAL REACTIONS; HANFORD RESERVATION; OFF-GAS SYSTEMS; PHYSICAL PROPERTIES; TESTING; DISPERSIONS; DISSOLUTION; MATERIALS; MIXTURES; NATIONAL ORGANIZATIONS; RADIOACTIVE MATERIALS; RADIOACTIVE WASTES; SEPARATION PROCESSES; SUSPENSIONS; US DOE; US ERDA; US ORGANIZATIONS; WASTES 052001* -- Nuclear Fuels-- Waste Processing