CAJ | 학술논문

福岛事件以后，核电站承受超设计基准地震能力受到广泛关注。作为抗震裕度分析（ SMA）的一部分，需要对仪控设备进行继电器震颤，以评估在发生超设计基准地震事故时（例如1．67倍安全停堆地震），电仪设备能否正确执行预期安全功能。基于国内现状和EPRI NP?6041?SL等报告，给出了继电器震颤分析范围、分析流程、分析方法，根据实际经验提出了分析假设和改进方案，并以福清核电站停堆断路器、稳压器电加热器配电盘、稳压器安全阀控制回路为典型对象进行了分析，分析结果表明福清核电厂在审查级地震下的继电器震颤是可接受的。
복도사건이후，핵전참승수초설계기준지진능력수도엄범관주。작위항진유도분석（ SMA）적일부분，수요대의공설비진행계전기진전，이평고재발생초설계기준지진사고시（례여1．67배안전정퇴지진），전의설비능부정학집행예기안전공능。기우국내현상화EPRI NP?6041?SL등보고，급출료계전기진전분석범위、분석류정、분석방법，근거실제경험제출료분석가설화개진방안，병이복청핵전참정퇴단로기、은압기전가열기배전반、은압기안전벌공제회로위전형대상진행료분석，분석결과표명복청핵전엄재심사급지진하적계전기진전시가접수적。
The safety of the nuclear power plants under the strong earthquake beyond the design?basis level is widely focused since Fukushima accident. In order to evaluate whether the anticipated safety function is performed at the earthquake beyond the design?basis level (e.g. 1.67 times of safe shutdown earthquake), the relay chatter analysis shall be performed as part of seismic margin assessment ( SMA) work. This paper discusses the methodology of the relay chatter analysis for I&C equipment based on the situation in China and EPRI NP?6041?SL, which includes a?nalysis scope, procedure and method. Also, the analysis hypothesis and the improvement suggestion are proposed according to the practical experience. Three typical analysis cases of the reactor trip breaker board, pressurizer heater power supply switchboard, and pressurizer safety valve control circuit are presented. The analysis result proves that the relay chatter under the review level earthquake ( RLE) is acceptable for Fuqing nuclear power plant.