核电厂乏燃料干式贮存容器老化效应检查策略
Aging effect inspection strategy of spent fuel dry storage container in nuclear power plant
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摘要: 核电厂乏燃料干式贮存是常见的乏燃料中间贮存方法,其通过乏燃料干式贮存设施在乏燃料进行后处理或作为放射性废物处置之前,为乏燃料提供安全可靠的贮存方式。然而,乏燃料干式贮存容器在辐照、温度、湿度和腐蚀介质等影响下不可避免地会发生老化降质。开发合理有效的乏燃料干式贮存容器检查策略,有助于及时识别和探测乏燃料干式容器的老化效应,保证乏燃料干式贮存容器结构的完整性及乏燃料贮存的安全性。调研分析了国内外实践经验,梳理了乏燃料干式贮存容器常见的失效机制,总结了乏燃料干式贮存容器检查大纲开发策略,结果可为国内乏燃料干式贮存容器建立可靠的检查策略提出建议。Abstract: The dry storage of spent fuel in nuclear power plant is a common intermediate storage method for spent fuel. It provides safe and reliable storage method of spent fuel through dry storage facilities before reprocessing of spent fuel or disposal as radioactive waste. However, the spent fuel dry storage container will inevitably undergo aging and degradation under the influence of irradiation, temperature, humidity and corrosive medium. The development of a reasonable and effective inspection strategy for spent fuel dry storage containers is helpful to identify and detect the aging effect of spent fuel dry storage containers in time, and ensure the structural integrity of spent fuel dry storage containers and the safety of spent fuel storage. The practical experience at home and abroad is investigated and analyzed, the common failure mechanism of spent fuel dry storage containers is sorted out, and the development strategy of the inspection outline of spent fuel dry storage containers is summarized. The results can provide suggestions for establishing a reliable inspection strategy for domestic spent fuel dry storage containers.