AP1000停堆断路器拒合问题分析及改进建议

Analysis and Improvement Suggestions for Resisting Close Problem of AP1000 Reactor Trip Breaker

针对AP1000核电站停堆断路器的拒合现象,从断路器、控制电源、控制回路的方面进行原因排查,指出停堆断路器控制回路非预期通路问题,并分析停堆断路器性能的影响,最终从电源、回路的角度提出改进建议。

For the resisting close problem of reactor trip breaker in AP1000 nuclear power station,the causes of failure are checked from the aspects of circuit breaker,control power supply and control circuit.The issue of unanticipated path of control circuit of the reactor trip breaker is pointed out,and the impact of the performance of the reactor trip breaker is analyzed.Finally improvement suggestions are put forward from the perspective of power supply and circuit.