Neutralization of steam generator denting. Volume 1. Final report. [PWR]
This report deals with experimental laboratory work, the purpose of which was to reproduce the denting phenomenon observed in some steam generator heat transfer tubing and then to determine the effectiveness of selected candidate additives with regard to their ability to inhibit the denting phenomenon. Denting was shown to be dependent on a synergism between materials, oxidants, chloride, crevice geometry, superheats and temperature. A reference denting environment was developed and candidate inhibitors to this environment were subsequently added in an attempt to prevent and/or stop the denting process. Boric acid applications in a soak/on-line mode were found to be completely effective with no indications of deleterious side effects. Boric acid has been recommended for field application on a plant-specific basis. Calcium hydroxide and sodium phosphate additions in an on-line mode were effective inhibitors.
- Research Organization:
- Westinghouse Electric Corp., Pittsburgh, PA (USA). Nuclear Technology Div.
- OSTI ID:
- 5282259
- Report Number(s):
- EPRI-NP-3023-Vol.1; ON: DE84920043
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
36 MATERIALS SCIENCE
INCONEL 600
CORROSION DENTING
PWR TYPE REACTORS
STEAM GENERATORS
REACTOR MATERIALS
TUBES
BORIC ACID
CALCIUM HYDROXIDES
CORROSION INHIBITORS
PERFORMANCE TESTING
WATER CHEMISTRY
ALKALINE EARTH METAL COMPOUNDS
ALLOYS
BOILERS
CALCIUM COMPOUNDS
CHEMISTRY
CHROMIUM ALLOYS
DEFORMATION
HYDROGEN COMPOUNDS
HYDROXIDES
INCONEL ALLOYS
INORGANIC ACIDS
IRON ALLOYS
MATERIALS
NICKEL ALLOYS
NICKEL BASE ALLOYS
NIOBIUM ALLOYS
OXYGEN COMPOUNDS
REACTORS
TESTING
VAPOR GENERATORS
WATER COOLED REACTORS
WATER MODERATED REACTORS
210200* - Power Reactors
Nonbreeding
Light-Water Moderated
Nonboiling Water Cooled
360105 - Metals & Alloys- Corrosion & Erosion