A new method for safety classifi cation of structures, systems and components by refl ecting nuclear reactor operating history into importance measures

Jie Cheng; Jie Liu; Shanqi Chen; Yazhou Li; Jin Wang; Fang Wang

doi:https://doi.org/10.1016/j.net.2021.09.039

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자료유형: 학술저널

저자정보: Jie Cheng (Institute of Nuclear Energy Safety Technology, Hefei Institutes of Physical Science) Jie Liu (Institute of Nuclear Energy Safety Technology, Hefei Institutes of Physical Science) Shanqi Chen (International Academy of Neutron Science, Qingdao, Shandong Prov, 266199, China) Yazhou Li (International Academy of Neutron Science, Qingdao, Shandong Prov, 266199, China) Jin Wang (International Academy of Neutron Science, Qingdao, Shandong Prov, 266199, China) Fang Wang (International Academy of Neutron Science, Qingdao, Shandong Prov, 266199, China)

저널정보: 한국원자력학회 Nuclear Engineering and Technology Nuclear Engineering and Technology 제54권 제4호

발행연도: 2022.4

수록면: 1,336 - 1,342 (7page)

DOI: https://doi.org/10.1016/j.net.2021.09.039

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Risk-informed safety classification of structures, systems and components (SSCs) is very important forensuring the safety and economic efficiency of nuclear power plants (NPPs). However, previous methodsfor safety classification of SSCs do not take the plant operating modes or the operational process of SSCsinto consideration, thus cannot concentrate on the safety and economic efficiency accurately. In thiscontribution, a new method for safety classification of SSCs based on the categorization of plant operating modes is proposed, which considers the NPPs operating history to improve the economic efficiencies while maintaining the safety. According to the time duration of plant configurations in plantoperating modes, average importances of SSCs are accessed for an NPP considering the operationalprocess, and then safety classification of SSCs is performed for plant operating modes. The correctnessand effectiveness of the proposed method is demonstrated by application in an NPP's safety classificationof SSCs

#Safety classification #Nuclear reactor #Plant operating mode #Plant configuration #Operating history #Importance measure

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