Modeling of cooling-water inleakage effects in PWR steam generators
Analytical models of solution chemistry in local regions of PWR steam generators with condenser inleakage of seawater, brackish water, cooling tower water, and fresh water have been developed. Acidic solutions are expected in crevices at other than fresh water sites; caustic solutions are expected at fresh water sites. While silica input associated with condenser inleakage had a negligible effect on crevice chemistry for the cases considered, silica input to the steam generators from other sources can be sufficiently larger to increase crevice acidity at seawater sites during condenser inleakage at steady state blowdown chloride concentrations of 50 to 200 ppB. Modeling results, in conjunction with corrosion estimates as a function of pH, can be employed to develop preliminary estimates of the effect of blowdown water quality on denting at operating plants.
- Research Organization:
- NWT Corp., San Jose, CA (USA)
- OSTI ID:
- 6598981
- Report Number(s):
- EPRI-NP-1786
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
21 SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS
210200* -- Power Reactors
Nonbreeding
Light-Water Moderated
Nonboiling Water Cooled
BOILERS
CHALCOGENIDES
CHEMICAL REACTIONS
CHEMISTRY
CORROSION
LEAKS
MATHEMATICAL MODELS
MINERALS
OXIDES
OXYGEN COMPOUNDS
PH VALUE
PWR TYPE REACTORS
REACTORS
SILICA
SILICON COMPOUNDS
SILICON OXIDES
STEAM GENERATORS
TUBES
VAPOR GENERATORS
WATER CHEMISTRY
WATER COOLED REACTORS
WATER MODERATED REACTORS
210200* -- Power Reactors
Nonbreeding
Light-Water Moderated
Nonboiling Water Cooled
BOILERS
CHALCOGENIDES
CHEMICAL REACTIONS
CHEMISTRY
CORROSION
LEAKS
MATHEMATICAL MODELS
MINERALS
OXIDES
OXYGEN COMPOUNDS
PH VALUE
PWR TYPE REACTORS
REACTORS
SILICA
SILICON COMPOUNDS
SILICON OXIDES
STEAM GENERATORS
TUBES
VAPOR GENERATORS
WATER CHEMISTRY
WATER COOLED REACTORS
WATER MODERATED REACTORS