压水堆核电厂ASG汽动泵蒸汽入口隔离阀开启故障分析
Open Failure Analysis of Parallel Slide Gate Valves in Steam Entrance of Steam Pump for PWR Auxiliary Water Supply System
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摘要: 针对国内多个压水堆核电厂出现的辅助给水系统（ASG）汽动泵蒸汽入口隔离阀无法按照要求开启的故障，采用故障树分析法进行故障根本原因分析，确定故障的根本原因为填料摩擦力过大或弹簧力过小，采用对阀门石墨填料换型为特氟龙填料彻底解决了故障。Abstract: In view of the failure of ASG steam pump steam inlet isolation valve which cannot be opened as required in many domestic PWR nuclear power plants, the fault tree analysis method is used to analyze the root cause of the failure. It is determined that the root cause of the failure is too much friction of the packing or too little spring force. The failure is completely solved by replacing the graphite packing of the valve with Teflon packing.
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Key words:
- Parallel slide gate valves /
- Open failure /
- Spring force /
- Friction
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