摘要
核电厂停堆大修期间要开展大量工作,造成系统设备集中停役,工作安排得不合理、人员操作失误、系统设备的随机失效等都可能影响停堆期间的安全性,因此核电厂有必要开发专业的工具来进行大修风险管理,确保核安全得到维持。论文详细描述了一种定性的大修风险管理工具的开发方法和步骤,对国内核电厂开展大修风险管理有很大的参考意义。该工具以纵深防御为基础,从维持关键安全功能的角度出发,使用一个将电厂配置和关键安全功能关联起来的整体模型,通过输入电厂运行模式、系统状态、设备失效等信息,可以定性评价纵深防御水平降级的程度和关键安全功能丧失的风险,并根据降级情况给出恢复纵深防御降低风险的应对措施。该工具可以在大修开展期间全面地评估风险,给出风险管理的建议以保障安全,同时也可以从安全角度确定将系统退出运行的最佳时间段,从而优化大修计划。
During the outage of nuclear power plants,due to the large amount of work to be performed,the centralized shutdown of systems and equipment,unreasonable work arrangements,personnel operational errors,random failures of systems and equipment,etc.,may affect the nuclear safety during shutdown.Therefore,the nuclear power plant needs to develop professional tools to manage the outage risk and ensure the nuclear safety.This paper describes the development methods and steps of a qualitative outage risk management tool in details,and has great reference meaning for domestic nuclear power plants to carry out the outage risk management.It is a integral model which associate the power plant configuration and key safety functions.Through the input of power plant operation mode,the system state,equipment failure and other information,the drop degree level of defense-in-depth and the risk of loss key safety functions can be qualitative evaluated,and measures is given to restore the defense-in-depth and reduce the risk according to the relegation situation.This tool can comprehensively evaluate the risk during outage,provide risk management recommendations to ensure the safety,and also determine the optimal time period to withdraw the system from safety perspective,hence optimize the outage plan.
作者
李乐
LI Le(Nuclear Power Operation Management Co.,Ltd.,CNNP,Haiyan,Zhejiang Prov.314300,China)
出处
《中国核电》
2024年第1期47-51,共5页
China Nuclear Power
关键词
核电厂
大修
大修风险管理
停堆安全功能分析树
power plant
outage
shutdown risk management
shutdown safety function analysis tree
