Abstract A Spent Fuel Pool (SFP) is designed to store spent fuel assemblies in the pool. And, a SFP cooling and cleanup system cools the SFP coolant through a heat exchanger which exchanges heat with component cooling water. If the cooling system fails or interfacing pipe (e.g., suction or discharge pipe) breaks, the cooling function may be lost, probably leading to fuel damage. In order to prevent such an incident, it is required to properly cool the spent fuel assemblies in the SFP by either recovering the cooling system or injecting water into the SFP. Probabilistic safety assessment (PSA) is a good tool to assess the SFP risk when an initiating event for the SFP occurs. Since PSA has been focused on reactor-side so far, it is required to study on the framework of PSA approach for SFP and identify the key factors in terms of fuel damage frequency (FDF) through a case study. In this study, therefore, a case study of SFP-PSA on the basis of design information of APR-1400 has been conducted quantitatively, and several sensitivity analyses have been conducted to understand the impact of the key factors on FDF.

中文翻译：

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核电厂乏燃料池风险评估框架的制定和案例研究

摘要 乏燃料池 (SFP) 旨在将乏燃料组件存储在池中。并且，SFP 冷却和净化系统通过热交换器冷却 SFP 冷却剂，该热交换器与组件冷却水进行热交换。如果冷却系统出现故障或接口管道（如吸入或排放管道）破裂，冷却功能可能会丧失，可能导致燃油损坏。为了防止此类事故发生，需要通过恢复冷却系统或向 SFP 中注入水来适当冷却 SFP 中的乏燃料组件。当 SFP 的始发事件发生时，概率安全评估 (PSA) 是评估 SFP 风险的好工具。由于迄今为止PSA一直专注于反应堆侧，需要研究SFP PSA方法的框架，并通过案例研究确定燃料损坏频率（FDF）方面的关键因素。因此，在本研究中，基于 APR-1400 的设计信息对 SFP-PSA 的案例进行了定量研究，并进行了多项敏感性分析，以了解关键因素对 FDF 的影响。