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Alternative washing strategy during in-tank precipitation processing

Technical Report ·
DOI:https://doi.org/10.2172/6935290· OSTI ID:6935290
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If late washing of precipitate is available, it is possible to modify the normal washing phase of the ITP process so that tank corrosion is prevented by inhibiting with sodium hydroxide rather than sodium nitrite. Hydroxide inhibition has numerous advantages to a hydroxide/nitrite flowsheet.1 However, the rate of hydroxide depletion due to radiolysis and C0[sub 2] absorption were uncertainties. Based on recent experiments and calculations: hydroxide consumption by radiolysis will be 0.01 molar per month during Tank 49 storage, hydroxide depletion due to C0[sub 2] absorption will vary from 0.0006 to 0.025 molar per month for waste volumes between 50,000 and 1 million gallons and air flowrates between 100 and 200 cfm. A nominal rate of 0.006 molar/month (or less) is expected in Tank 49 after the first two ITP cycles have been completed. A material balance for the ITP process based on hydroxide inhibition has been calculated and the potential savings have been estimated.

Research Organization:
Westinghouse Savannah River Co., Aiken, SC (United States)
Sponsoring Organization:
DOE; USDOE, Washington, DC (United States)
DOE Contract Number:
AC09-89SR18035
OSTI ID:
6935290
Report Number(s):
WSRC-RP-92-1259; ON: DE93008505
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
38 RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEAR CHEMISTRY
400600 -- Radiation Chemistry
ABSORPTION
CARBON COMPOUNDS
CARBON DIOXIDE
CARBON OXIDES
CHALCOGENIDES
CHEMICAL RADIATION EFFECTS
CHEMICAL REACTIONS
CLEANING
CONTAINERS
CORROSION
DECOMPOSITION
DISPERSIONS
HYDROGEN COMPOUNDS
HYDROXIDES
INDUSTRIAL PLANTS
MANAGEMENT
MIXTURES
NATIONAL ORGANIZATIONS
NITRITES
NITROGEN COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PRECIPITATION
PROCESSING
RADIATION EFFECTS
RADIOACTIVE WASTE MANAGEMENT
RADIOACTIVE WASTE PROCESSING
RADIOLYSIS
SAVANNAH RIVER PLANT
SEPARATION PROCESSES
SLURRIES
SORPTION
SUSPENSIONS
TANKS
US AEC
US DOE
US ERDA
US ORGANIZATIONS
WASHING
WASTE MANAGEMENT
WASTE PROCESSING
WASTE PROCESSING PLANTS