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首页> 外文会议>PSAM9 >An Approach to Quantification of Uncertainties in the Risk of Severe Accidents at Neckarwestheim Unit 1 Nuclear Power Plant and the Risk Impact of Severe Accident Management Measures
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An Approach to Quantification of Uncertainties in the Risk of Severe Accidents at Neckarwestheim Unit 1 Nuclear Power Plant and the Risk Impact of Severe Accident Management Measures

机译：核电站核电站严重事故风险规范的方法及严重事故管理措施的风险影响

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摘要

A level-2 probabilistic safety assessment (PSA) is an integrated approach to investigate the progression of severe accidents up to containment failure and release of radionuclides into the environment, including an assessment of uncertainties in severe accidents, containment challenges, and radiological releases. The results of a classical level-2 PSA include the frequencies of containment failure modes (release categories) along with the amount of environmental release of radioisotopes (source terms), but not a common "metric" that would readily enable risk-benefit analyses. This necessitates the introduction of a definition of a risk metric and an approach to its quantification within the confines of an extended level-2 PSA, which enables the assessment of the baseline risk and the risk implications of any existing or potentially viable future accident management actions at a given plant. This paper focuses on the approach used to assess the uncertainties in the risk of severe accidents as part of a recently completed level-2 PSA for the 840-MW_e Neckarwestheim Unit 1 nuclear power plant, a 3-loop Siemens-Kraftwerk-Union pressurized water reactor, which entered commercial operation in 1976, demonstrating the risk implications of various accident management measures.
机译：2级概率安全评估（PSA）是一种综合方法，探讨严重事故的进展，抵抗遏制失败，并将放射性核素释放到环境中，包括评估严重事故，遏制挑战和放射释放的不确定性。经典水平-2 PSA的结果包括容纳失败模式（释放类别）的频率以及放射性同位素的环境释放量（源术语），但不是常见的“公制”，可以容易地实现风险效益分析。这需要引入风险指标的定义和在扩展水平-2 PSA的范围内进行其量化的方法，这使得能够评估基线风险和任何现有或潜在可行的未来事故管理行动的风险影响在给定的植物。本文重点介绍，用于评估严重事故风险中的不确定性，作为最近完成的840-MW_E领域的2级PSA的一部分，适用于840-MW_E Neckarwestheim Unit 1核电站，这是一个3环西门子 - Kraftwerk-Union加压水在1976年进入商业运营的反应堆，展示了各种事故管理措施的风险影响。

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