The evaluation of iron-base hardfacing alloys on gate valves after cycling under simulated PWR conditions for one year
- Atomic Energy of Canada Ltd., Ontario (Canada)
- Electric Power Research Institute, Palo Alto, CA (United States)
Gate valves hardfaced with iron-base alloys were exposed for about one year to simulated PWR conditions. The hardfacing alloys tested were EB 5183, EVERIT 50, NOREM 01 and NOREM 04. A gate valve with Satellite 6 was included in the test program as a control standard. During the test period the valves were opened and closed 2000 times. The performance of the valves was assessed by periodic leak tests and visual and profilometric characterisation of sealing surfaces. At the end of the test program, the seats and discs were destructively examined. The various examinations indicated all the iron-base alloys were superior to Satellite 6. Based on the results of hot leakage tests, one valve with EB 5183 and the valve with NOREM 04 were the best performers.
- OSTI ID:
- 48064
- Report Number(s):
- CONF-910808--
- Country of Publication:
- United States
- Language:
- English
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