In situ application of hard-facing materials in Main Steam Isolation Valves. Final report
The Main Steam Isolation Valves (MSIV) in boiling water reactors (BWR) have shown a tendency to fail a local leak rate test (LLRT). Lapping applications were developed to improve seat conditions, but continued lapping or incorrect lapping can result in the need to resurface the seat. The Electric Power Research Institute (EPRI) has initiated research projects (RP-2186-1, -2, and -4) to address the problem of hardfacing in MSIVs. This final report is a compilation of the results of research projects that evaluate the application of hardfacing materials to MSIVs (RP-2186-1) and resurfacing the valve body main seat (RP-2186-2). The report also discusses in-situ application of hardfacing in MSIVs (RP-2186-4).
- Research Organization:
- Jones (J.A.) Applied Research Co., Charlotte, NC (USA)
- OSTI ID:
- 6041020
- Report Number(s):
- EPRI-NP-3926; ON: TI85920523
- Country of Publication:
- United States
- Language:
- English
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