Technical basis for a minimum hydroxide concentration in tanks containing dilute waste
Laboratory tests were performed to address the protection of waste tank steel from corrosion in situations of elevated temperatures up to 75 C (hot spots) in the sludge layer of Extended Sludge Processing (ESP) tanks. Coupon immersion tests were conducted at 75 C in two ESP simulants at four hydroxide (or pH) levels. The nitrite concentrations of the simulants were calculated from the ESP technical standards based on a temperature of 40 C. The results showed that a hydroxide concentration of at least 0.01 M prevented significant corrosion of the steel at the elevated temperature. This conclusion provides the technical basis for the revised minimum hydroxide concentration of 0.01 M in the draft WSRC 241-82H Control Room Process Requirements, for the ESP tanks.
- Research Organization:
- Westinghouse Savannah River Co., Aiken, SC (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- AC09-89SR18035
- OSTI ID:
- 119887
- Report Number(s):
- WSRC-TR--95-0213; ON: DE96001692
- Country of Publication:
- United States
- Language:
- English
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Revised minimum nitrite concentration for ESP
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Related Subjects
CARBON DIOXIDE
CARBON STEELS
CARBONATES
CONCENTRATION RATIO
CORROSION PROTECTION
DISSOLUTION
HIGH-LEVEL RADIOACTIVE WASTES
HYDROXIDES
NITRITES
PH VALUE
PITTING CORROSION
RADIOACTIVE WASTE FACILITIES
RADIOACTIVE WASTE PROCESSING
RADIOACTIVE WASTE STORAGE
SAVANNAH RIVER PLANT
SLURRIES
TANKS