核电厂棒电源系统停堆功能的接口设计

摘要

为解决核电工程项目中因系统接口不明晰而可能造成的安全风险及工程进度延误等问题,以第三代国产化核电堆型CAP1400示范工程为例,着重解决了与棒电源系统实现停堆功能相关的接口问题.简要介绍了核电厂棒电源系统的基本结构和功能需求,给出了CAP1400数字化仪控系统的总体结构,并重点描述了棒电源系统(RDPS)、多样化驱动系统(DAS)、主交流电源系统(ECS)、电厂控制系统(PLS)、地震自动停堆系统(ESS),包括仪控系统的层级分布、接口功能实现原理及设计特点等.总结了第三代核电堆型CAP1400棒电源系统停堆功能的多样性和冗余性等特点.该设计保证了RDPS停堆功能的安全、可靠运行,并为后续核电项目的接口设计及管理提供参考.%In nuclear power projects,the unclear systematic interfacing may lead to safety risks and delay in progress,taking the third generation localized nuclear power reactor CAP1400 demonstration project as example,the related shutdown interfacing issues for rod drive power system are emphasized. The basic structure and functional requirements of rod drive power system are introduced briefly,and the overall structure of CAP1400 digital I&C system is described, especially the shutdown interfaces for rod drive power system(RDPS),diverse actuation system(DAS),main AC power system(ECS),plant control system(PLS), earthquake shutdown system(ESS), and reactor trip system(RTS) in the design of nuclear power plant I&C system are presented in detail, including the hierarchical distribution of I&C system, realization principle of interfacing function and the design features,etc. The diversity and redundancy characteristics of the shutdown functions of the third generation nuclear power reactor CAP1400 are concluded. The design ensures the safety and reliable operation of RDPS shutdown function, provides references for the interface design and management of follow-up nuclear projects.