Cracking of Alloy 600 heater sleeves and nozzles in PWR pressurizers
- 1. ABB-Combustion Engineering Nuclear Power, Windsor, CT (United States)
- 2. Baltimore Gas ampersand Electric Co., MD (United States)
- 3. Electric Power Research Institute, Palo Alto, CA (United States)
Description
NiCrFe Alloy 600 is widely used throughout the primary system of PWRs for applications other than steam generator tubes and tube plugs where numerous incidents of Primary Water Stress Corrosion Cracking (PWSCC) have occurred. The performance of Alloy 600 in these other applications has generally been good but there have been a few PWSCC incidents in pressurizer instrumentation nozzles and heater sleeves. This paper reviews these Alloy 600 cracking incidents and then presents the results of a failure analysis of Alloy 600 pressurizer heater sleeves from an operating PWR. The analysis concluded that a combination of non-optimum metallurgical condition, cold-work induced during the fabrication process and residual stresses from a partial penetration weld produced conditions that resulted in PWSCC of the heater sleeves
Additional details
Publishing Information
- Publisher
- American Nuclear Society, Inc.
- Imprint Place
- La Grange Park, IL (United States)
- Imprint Title
- Proceedings of the fifth international symposium on environmental degradation of materials in nuclear power systems - water reactors
- Imprint Pagination
- 995 p.
- Journal Page Range
- p. 652-660.
Conference
- Title
- 5. international symposium on environmental degradation of materials in nuclear power systems - water reactors.
- Dates
- 25-29 Aug 1991.
- Place
- Monterey, CA (United States).
INIS
- Country of Publication
- United States
- Country of Input or Organization
- United States
- INIS RN
- 26060157
- Subject category
- S21: SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS; S36: MATERIALS SCIENCE; S36: MATERIALS SCIENCE;
- Resource subtype / Literary indicator
- Conference
- Descriptors DEI
- CALVERT CLIFFS-1 REACTOR; CALVERT CLIFFS-2 REACTOR; INCONEL 600; INTERGRANULAR CORROSION; PRESSURIZERS; STRESS CORROSION
- Descriptors DEC
- ALLOY-NI76CR15FE8; ALLOYS; ALUMINIUM ADDITIONS; CHEMICAL REACTIONS; CHROMIUM ALLOYS; CORROSION; CORROSION RESISTANT ALLOYS; ENRICHED URANIUM REACTORS; HEAT RESISTANT MATERIALS; HEAT RESISTING ALLOYS; INCONEL ALLOYS; IRON ALLOYS; MATERIALS; NICKEL ALLOYS; NICKEL BASE ALLOYS; NIMONIC; POWER REACTORS; PWR TYPE REACTORS; REACTORS; THERMAL REACTORS; TITANIUM ADDITIONS; TRANSITION ELEMENT ALLOYS; WATER COOLED REACTORS; WATER MODERATED REACTORS
Optional Information
- Secondary number(s)
- CONF-910808--.