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A dynamic probabilistic safety margin characterization approach in support of Integrated Deterministic and Probabilistic Safety Analysis

机译:支持集成确定性和概率安全分析的动态概率安全裕度表征方法

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摘要

The challenge of Risk-Informed Safety Margin Characterization (RISMC) is to develop a methodology for estimating system safety margins in the presence of stochastic and epistemic uncertainties affecting the system dynamic behavior. This is useful to support decision-making for licensing purposes. In the present work, safety margin uncertainties are handled by Order Statistics (OS) (with both Bracketing and Coverage approaches) to jointly estimate percentiles of the distributions of the safety parameter and of the time required for it to reach these percentiles values during its dynamic evolution. The novelty of the proposed approach consists in the integration of dynamic aspects (i.e., timing of events) into the definition of a dynamic safety margin for a probabilistic Quantification of Margin and Uncertainties (QMU). The system here considered for demonstration purposes is the Lead-Bismuth Eutectic- eXperimental Accelerator Driven System (LBE-XADS).
机译:风险告知安全裕度表征(RISMC)的挑战是开发一种在存在影响系统动态行为的随机和认知不确定性的情况下估算系统安全裕度的方法。这对于支持出于许可目的的决策很有用。在当前工作中,安全边际不确定性由“订单统计”(OS)处理(使用包围法和覆盖率法),以共同估算安全参数分布的百分位数以及在其动态过程中达到这些百分位数所需的时间演化。所提出的方法的新颖性在于将动态方面(即事件的时间安排)集成到用于对保证金和不确定性(QMU)进行概率量化的动态安全余量的定义中。这里考虑用于演示目的的系统是铅铋共晶-实验加速器驱动系统(LBE-XADS)。

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