大亚湾核电站风险指引型在役检查分析  

Risk-Informed Inservice Inspection Evaluation in Daya Bay Nuclear Power Plant

作　　者：刘萍萍 郗海英 

机构地区：[1]中广核研究院有限公司,广东深圳518031 [2]苏州热工研究院,广东深圳518038

出　　处：《核动力工程》2016年第5期89-92,共4页Nuclear Power Engineering

摘　　要：详细描述大亚湾核电站风险指引型在役检查分析的方法及实施流程,并应用该方法对大亚湾核电站1号机组余热排出系统现行在役检查进行优化。优化后,余热排出系统的检查位置和检查数量发生变化。风险指引型在役检查方法能在保持和改善公众健康和安全的同时,尽可能地减少检查数量进而减少在役检查人员的职业照射。然而,风险指引型在役检查的关键不是简单地减少检查数量或改变检查方法,更重要的是关注风险重要的管段,检查基于"降质机理"(基于原因),能够提高在役检查的效果。文章最后对风险指引型在役检查方法实施过程中一些关键问题进行讨论,为方法的应用提出若干建议。This paper describes in detail the methodology and implementation process of the risk-informed inservice inspection evaluation in Daya Bay nuclear power plant. The risk-informed inservice inspection evaluation is used to optimize the current inservice inspection of the residual heat removal system in Daya Bay unit 1. After optimization, the inspection location and numbers change. The assessment results show that the risk-informed inspection method is effective. It can focus on the risk significant locations, decrease the inspection numbers and the staff occupation doses, and the public health and safety are maintained and improved. The risk-informed inservice inspection does not only simply decrease the inspection numbers or change the inspection methods, but also pays more attention to the risk significant pipe segments. Risk-informed inservice inspection evaluation makes the inspection based on the degradation mechanism, i.e. cause-based, to improve the inspection effectiveness. In the end, some key issues about the risk-informed inservice inspection evaluation process are discussed and suggestions are proposed on its application.

关 键 词：风险指引型在役检查 概率安全分析 降质机理 风险矩阵 风险评估 

分 类 号：TL333[核科学技术—核技术及应用]