适用于动态PRA的源项评价方法的发展

Koichi Nakamura, Sunghyon Jang, A. Yamaguchi
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引用次数: 1

摘要

2级概率风险评估(PRA)提供了对核安全的有用见解,该评估评估了核电站(NPPs)事故期间释放到环境中的裂变产物(FP)的风险。2级PRA一般采用包容事件树方法。在该方法中,事故场景由多个分支点的组合来表示。这种方法近似地或代表性地处理了可能发生的事故情景。动态PRA可以对各种事故事件的复杂变化或构成进行动态的事故风险评估。为建立以FP在环境中释放风险为重点的动态PRA方法,提出了一种合理的源项评价方法,且计算量小。本研究旨在将现象学关系图(PRD)方法应用于动态PRA,建立一种合理的源项评价方法。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
The Development of the Advanced Method for the Source Term Evaluation Applicable to the Dynamic PRA
Useful insights on nuclear safety are provided by the level 2 probabilistic risk assessment (PRA), which evaluates the risk of fission products (FP) released in the environment during an accident in nuclear power plants (NPPs). The containment event tree method is generally employed for level 2 PRA. In this method, the accident scenarios are expressed by the combination of a number of branch points. The possible accident scenarios are approximately or representatively dealt with in this method. Dynamic PRA can evaluate the accident risk with complex changes or composition of various accident events dynamically. A reasonable source term evaluation method, which can be conducted with a small computational load, is developed for the establishment of dynamic PRA method focused on the risk of the release of FP in the environment. The proposed study aims to develop a reasonable source term evaluation method by applying phenomenological relationship diagram (PRD) method applicable to the dynamic PRA is developed.
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