核电厂一回路压力边界死管段止回阀及缺陷管道更换项目可靠性管理

Reliability Management for the Project of Pipe Dead End Check Valve and Defect Pipeline Replacement in Nulear Power Plant

核电厂一回路压力边界存在的死管段现象易导致设备缺陷,对主冷却剂泄漏率控制具有重大影响,此类缺陷处理的技术难度和标准很高。本文对某核电厂实施的国内首次死管段止回阀及缺陷管道更换项目进行了分析,结果证明,通过技术方案保守分析和选择、采用故障树分析法确定项目风险点并进行分类、采用鱼骨图分析法确定风险管控措施并分阶段进行过程控制等,可提高项目管理的可靠性。

Pipe dead end conditions in primary loop pressure boundary of nuclear power plant easily lead to equipment defects that have a signi.cant impact on the coolant leakage rate control,and it is hard to deal with the defects. By analysis of the first domestic project of pipe dead end check valve and defected pipeline replacement in a nuclear power plant,it proved that the project reliability can be improved through conservative analysis and selection of technical solutions,project risks identification and classification by failure tree analysis,risk control measures determination by fishbone diagram analysis and phased process control.