大事件树/小故障树方法在船用核动力装置给水管道大破口事故评价中的应用

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Application of Large Event Tree/Small Fault Tree Approach in Evaluation of MNPP Feedwater Lines Large Break Accident

College of Nuclear Science and Technology, Key Laboratory of Nuclear Safety and Simulation Technology, Harbin Engineering University, Harbin, 150001, China

摘要: 介绍了大事件树/小故障树方法的原理、小事件的划分依据和规则、大事件树的建立规则以及大事件树的模块化方法等。使用上述方法完成了某船用核动力装置满功率工况下给水管道大破口事故的概率安全评价(PSA),确定了该事故工况下对堆芯损毁有主要贡献的因素,识别了系统的薄弱环节。应用结果表明:该方法具有直接体现支持系统与前沿系统的相关性并评价支持系统重要性等优点。
- 概率安全评价 /
- 大事件树/小故障树 /
- 给水管道 /
- 大破口
Abstract: The principle of large event tree/small fault tree approach,the gist and rule for small event classification,and the establishing rule and modularization of large event tree are introduced.The dominant contributors to the core damage and the weakness of the system were identified through studying the Probability Safety Assessment（PSA） by large event tree/small fault tree approach for the feedwater lines large break accident of MNPP in full power condition.The result of application indicates that the approach is with the advantage of directly representing the relativity between the support system and front system and estimating the importance of the support system.
- Probability safety assessment /
- Large event tree/small fault tree /
- Feedwater lines /
- Large break