Boric acid application guidelines for intergranular corrosion inhibition

Technical Report · Sat Dec 01 00:00:00 EST 1990

OSTI ID:6190754

Piskor, S R ^[1]

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1. Westinghouse Electric Corp., Pittsburgh, PA (USA). Nuclear Services Div.

A significant fraction of the operating Pressurized Water Reactor steam generators have used or are using boric acid as an inhibitor to control stress corrosion cracking, intergranular attack, or denting. Boric acid is applied on line, or by means of crevice flushing, low power soaks, or a combination of these methods. When boric acid is used, it is important to have knowledge about its chemical and physical properties, its effect on corrosion, and its correct application. The data on these subjects may be found in a diversity of sources, which are often not readily available or convenient to use. In addition, new information has recently become available. This report has been prepared and revised to be comprehensive treatise on boric acid relevant to its application in nuclear steam generators. Relevant boric acid information from 1987--89 has been added to provide the latest available data from laboratory testing and power plant application. 5 figs.

• Research Organization: Electric Power Research Inst., Palo Alto, CA (USA); Westinghouse Electric Corp., Pittsburgh, PA (USA). Nuclear Services Div.
• Sponsoring Organization: EPRI
• OSTI ID: 6190754
• Report Number(s): EPRI-NP-5558-M-Rev.1; TRN: 91-002832
• Country of Publication: United States
• Language: English

Related Subjects

21 SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS
36 MATERIALS SCIENCE
BORIC ACID
CHEMICAL PROPERTIES
INCONEL ALLOYS
CORROSION PROTECTION
PWR TYPE REACTORS
STEAM GENERATORS
CORROSION INHIBITORS
CRACKS
CRYSTAL STRUCTURE
INTERGRANULAR CORROSION
PHYSICAL PROPERTIES
STRESS CORROSION
WATER CHEMISTRY
ALLOYS
BOILERS
CHEMICAL REACTIONS
CHEMISTRY
CORROSION
HYDROGEN COMPOUNDS
INORGANIC ACIDS
NICKEL ALLOYS
NICKEL BASE ALLOYS
REACTORS
VAPOR GENERATORS
WATER COOLED REACTORS
WATER MODERATED REACTORS
210200* - Power Reactors
Nonbreeding
Light-Water Moderated
Nonboiling Water Cooled
360105 - Metals & Alloys- Corrosion & Erosion