某二代核电厂主给水调节阀继电器脱敏研究  

Study on Relay Desensitization of Main Feed Water Regulating Valves in A Second Generation Nuclear Power Plant

作　　者：陈家庆 胡跃华 赵明 曹勇 谭坤 CHEN Jia-qing;HU Yue-hua;ZHAO Ming;CAO Yong;Tan Kun(CNNP Nuclear Power Operation and Management Co,.Ltd.,Haiyan Zhejiang 314300,China;Shanghai Nuclear Engineering Research&Design Institute Co.Ltd.,Shanghai 200233,China;China Productivity Center for Machinery Co.,Ltd.,Beijing 100044,China)

机构地区：[1]中核核电运行管理有限公司,浙江海盐314300 [2]上海核工程研究设计院股份有限公司,上海200233 [3]中机生产力促进中心有限公司,北京100044

出　　处：《机电产品开发与创新》2025年第2期108-110,143,共4页Development & Innovation of Machinery & Electrical Products

摘　　要：某二代核电厂的原有设计中,当主给水隔离信号产生时,将触发对应继电器动作,进而关闭相应的主给水调节阀。根据原电厂设计,任何一个继电器误动作都将切断蒸发器供水,进而引起电厂停堆,因此控制主给水调节阀的四个继电器为单点失效(SPV)设备。本文对这些SPV设备开展脱敏研究,研究评估了变更继电器控制逻辑以避免因单一故障造成非计划停堆的优化方案,对比分析现控制逻辑和优化后的控制逻辑对调节阀误动和拒动的影响,以及对电厂堆芯损伤频率(CDF)的影响,研究表明在保证核电厂安全性的前提下,优化方案可实现继电器脱敏,降低因继电器误动导致的停堆频率。In the original design of a second-generation nuclear power plant(NPP),when the isolation signal of the main feedwater supply is generated,the corresponding relay will be triggered to close the corresponding main feedwater regulating valve.According to the original design of the NPP,any spurious operation of the relay will cut off the feed water supply,and then cause the reactor trip,so the four relays controlling the main feed water regulator valves are single point failure(SPV)equipment.In this paper,desensitization of these SPV equipment is studied,and the optimization scheme of changing relay control logic to avoid unplanned reactor trip due to a single fault is evaluated.The influence of the current control logic and the optimized control logic on the spurious operation and rejection of the regulating valves and the influence on the core damage frequency(CDF)of the NPP is compared and analyzed.The results show that under the premise of ensuring the safety of nuclear power plant,the optimal scheme can realize relay desensitization and reduce the reactor trip frequency caused by relay spurious operation.

关 键 词：单点失效 主给水调节阀 继电器 控制逻辑 停堆频率 堆芯损伤频率 

分 类 号：TL33[核科学技术—核技术及应用]