Nuclear Engineering and Technology

  • 제54권4호
  • /
  • Pages.1336-1342
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  • 2022
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  • 1738-5733(pISSN)
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  • 2234-358X(eISSN)
한국원자력학회 (Korean Nuclear Society)
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A new method for safety classification of structures, systems and components by reflecting nuclear reactor operating history into importance measures

  • Cheng, Jie (Institute of Nuclear Energy Safety Technology, Hefei Institutes of Physical Science, Chinese Academy of Sciences) ;
  • Liu, Jie (Institute of Nuclear Energy Safety Technology, Hefei Institutes of Physical Science, Chinese Academy of Sciences) ;
  • Chen, Shanqi (International Academy of Neutron Science) ;
  • Li, Yazhou (International Academy of Neutron Science) ;
  • Wang, Jin (International Academy of Neutron Science) ;
  • Wang, Fang (International Academy of Neutron Science)
  • 투고 : 2021.04.17
  • 심사 : 2021.09.30
  • 발행 : 2022.04.25
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초록

Risk-informed safety classification of structures, systems and components (SSCs) is very important for ensuring the safety and economic efficiency of nuclear power plants (NPPs). However, previous methods for safety classification of SSCs do not take the plant operating modes or the operational process of SSCs into consideration, thus cannot concentrate on the safety and economic efficiency accurately. In this contribution, 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 plant operating modes, average importances of SSCs are accessed for an NPP considering the operational process, and then safety classification of SSCs is performed for plant operating modes. The correctness and effectiveness of the proposed method is demonstrated by application in an NPP's safety classification of SSCs.

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과제정보

We thank other FDS Team members, and authors and contributors of references cited. This work is supported by the National Natural Science Foundation of China (71671179, 51805511, 72001201).

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