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House events matrix for shutdown probabilistic safety assessment

机译：房屋事件矩阵关闭概率安全评估

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Probabilistic safety assessment is one of the standardized ways of assessing safety of nuclear power plants. The objective of the method is to present an extension of the fault tree in order to reduce the size of the shutdown probabilistic safety assessment model. The shutdown probabilistic safety assessment method is developed. The modelling for all plant operating states include consideration of 15 states, which were determined as appropriate representations of much more plant configurations in addition to the plant full power operation. For dealing with the complexity of the models and manageable size of the models for the sensitivity studies it is essential that the models optimizations are performed. House events matrix plays an important role as it reduces the number of the fault trees significantly. The results include the time dependent representation of the core damage frequency contributions weighted for their plant operating state durations over total duration of the shutdown timely through the whole shutdown. The risk of the plant during shutdown is smaller in general than in full power operation, however for certain specific plants and their specific plant operating states the risk for a short duration of time may increase beyond the risk of full steady state power operation.
机译：概率安全评估是评估核电厂安全的标准化方式之一。该方法的目的是呈现故障树的延伸，以减小关闭概率安全评估模型的大小。开发了关闭概率安全评估方法。所有工厂操作状态的建模包括考虑15个州，除了植物全电源外，还确定了更多植物配置的适当表示。为了处理模型的复杂性和智能化研究的模型的可管理大小，必须执行模型优化。房屋活动矩阵扮演着重要作用，因为它会显着减少故障树的数量。结果包括核心损伤频率贡献的时间依赖性表示，其植物运行状态持续时间通过整个关机的完全持续时间。关闭期间的植物的风险通常比全动力运行更小，但对于某些特定的植物及其特定的工厂，操作状态短暂持续时间的风险可能会增加全稳态电力运行的风险。

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