Chemical neutralization to control denting in nuclear steam generators

Journal Article · Sat Oct 01 04:00:00 EDT 1983 · J. Eng. Power; (United States)

DOI:https://doi.org/10.1115/1.3227479· OSTI ID:7063433

Beineka, T A; Ball, J F; Fink, G C; Grondahl, E E; Marugg, K E; Orsuiak, R M; Scott, D B; Silva, E J

Laboratory testing at Combustion Engineering has indicated promise in controlling simulated steam generator tube denting through chemical neutralization. Testing was limited to on-line treatment, and two neutralizers have been evaluated: calcium hydroxide and boric acid. On-line treatment with calcium hydroxide successfully halted active denting whenever the bulk calcium concentration (in ppm) equaled or exceeded the bulk chloride concentration (in ppm). Calcium hydroxide also was effective as an alternative to ammonia as a pH controlling agent in two tests conducted without ingress of chloride. On-line treatment with boric acid consisted of a four-day soak at simulated low (approximately 30 percent) power with 50 ppm B followed by one month full-power operation with 10 ppm B. This treatment also halted denting. Nondestructive and destructive examination of test boilers gave no indication of adverse side effects associated with either neutralizer.

• Research Organization: Combustion Engineering, Inc., Materials and Chemistry Department, Windsor, CT
• OSTI ID: 7063433
• Journal Information: J. Eng. Power; (United States), Journal Name: J. Eng. Power; (United States) Vol. 105:4; ISSN JEPOA
• Country of Publication: United States
• Language: English

Related Subjects

21 SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS
210200* -- Power Reactors
Nonbreeding
Light-Water Moderated
Nonboiling Water Cooled
ALKALINE EARTH METAL COMPOUNDS
BENCH-SCALE EXPERIMENTS
BOILERS
BORIC ACID
CALCIUM COMPOUNDS
CALCIUM HYDROXIDES
CHEMICAL REACTION KINETICS
CHEMISTRY
CORROSION DENTING
CORROSION INHIBITORS
DEFORMATION
HYDROGEN COMPOUNDS
HYDROXIDES
INORGANIC ACIDS
KINETICS
OXYGEN COMPOUNDS
PH VALUE
PWR TYPE REACTORS
REACTION KINETICS
REACTORS
STEAM GENERATION
STEAM GENERATORS
TUBES
VAPOR GENERATORS
WATER CHEMISTRY
WATER COOLED REACTORS
WATER MODERATED REACTORS