Open AccessStudy on Reliability Improvement of Main Steam Isolation Valve Control in Nuclear Power Plants
Author(s) -
Changxian Gan,
Tian Wan,
Weiwei Pan,
Shengzhi Liu,
Lei Tang,
Huahuan Li
Publication year - 2021
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/2005/1/012215
Subject(s) - shutdown , interlock , nuclear power , reliability (semiconductor) , reliability engineering , nuclear power plant , isolation (microbiology) , control valves , engineering , control logic , nuclear reactor , safety valve , nuclear engineering , power (physics) , automotive engineering , computer science , electrical engineering , control engineering , mechanical engineering , computer hardware , physics , microbiology and biotechnology , quantum mechanics , nuclear physics , biology , ecology
There is a safety hazard in the interlock control logic of the second circuit main steam isolation valves of the CPR1000 nuclear power unit. During reactor power operation, any abnormal full-close limit switch signal of valves may lead to a reactor shutdown event or even a Safety Injection of nuclear reactor. In this Paper, the control strategy of the second circuit main steam isolation valves is analyzed and demonstrated, and after Probabilistic Safety Assessment(PSA), a feasible improvement plan is proposed, which effectively improves the control reliability of the second circuit system in nuclear power plants.