Application of signature analysis for determining the operational readiness of motor-operated valves under blowdown test conditions
| Autor: | H.D. Haynes |
|---|---|
| Rok vydání: | 1990 |
| Předmět: |
Nuclear and High Energy Physics
Engineering Operability business.industry Mechanical Engineering Nuclear engineering Electrical engineering Oak Ridge National Laboratory Gate valve Nuclear Energy and Engineering Cabin pressurization Torque Boiling water reactor General Materials Science Safety Risk Reliability and Quality business Waste Management and Disposal Boiler blowdown Voltage |
| Zdroj: | Nuclear Engineering and Design. 118:399-408 |
| ISSN: | 0029-5493 |
| DOI: | 10.1016/0029-5493(90)90041-u |
| Popis: | In support of the NRC-funded Nuclear Plant Aging Research (NPAR) program, Oak Ridge National Laboratory (ORNL) has carried out a comprehensive aging assessment of motor-operated valves (MOVs). As part of this work, ORNL participated in the gate valve flow interruption blowdown (GVFJB) tests carried out in Huntsville, Alabama, The tests provided an excellent opportunity to evaluate signature analysis methods for determining the operability of MOVs under accident conditions. ORNL acquired motor current and torque switch shaft angular position signauresnon two test MOVs during several GVFIB tests. The reduction in operating “margin” of both MOVs due to the presence of additional value running loads imposed by high flow was clearly observed in motor current and troque switch angular signatures. In addition, the effects of differential pressure, fluid temperature, and line voltage on MOV operations were observed and more clearly understood as a result of utilizing the signature analysis techniques. |
| Databáze: | OpenAIRE |
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