Nuclear Engineering and Technology

Korean Nuclear Society (한국원자력학회)
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Parameter importance ranking for SBLOCA of CPR1000 with moment-independent sensitivity analysis

  • Xiong, Qingwen (State Key Laboratory of Multiphase Flow in Power Engineering, School of Nuclear Science and Technology, Xi'an Jiaotong University) ;
  • Gou, Junli (State Key Laboratory of Multiphase Flow in Power Engineering, School of Nuclear Science and Technology, Xi'an Jiaotong University) ;
  • Shan, Jianqiang (State Key Laboratory of Multiphase Flow in Power Engineering, School of Nuclear Science and Technology, Xi'an Jiaotong University)
  • Received : 2020.03.23
  • Accepted : 2020.05.28
  • Published : 2020.12.25
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Abstract

The phenomenon identification and ranking table (PIRT) is an important basis in the nuclear power plant (NPP) thermal-hydraulic analysis. This study focuses on the importance ranking of the input parameters when lacking the PIRT, and the target scenario is the small break loss of coolant accident (SBLOCA) in a pressurized water reactor (PWR) CPR1000. A total of 54 input parameters which might have influence on the figure of merit (FOM) were identified, and the sensitivity measure of each input on the FOM was calculated through an optimized moment-independent global sensitivity analysis method. The importance ranking orders of the parameters were transformed into the Savage scores, and the parameters were categorized based on the Savage scores. A parameter importance ranking table for the SBLOCA scenario of the CPR1000 reactor was obtained, and the influences of some important parameters at different break sizes and different accident stages were analyzed.

Keywords

Acknowledgement

The authors would like to express their special thanks for the support from the National Science and Technology Major Project (Grant Nos.: 2019ZX06005001)

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