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Investigations on seismic performance of nuclear power plants equipped with an optimal BIS-TMDI considering FSI effects

  • Shuaijun Zhang (Yantai Research Institute of Harbin Engineering University) ;
  • Gangling Hou (Yantai Research Institute of Harbin Engineering University) ;
  • Chengyu Yang (State Key Laboratory of Disaster Reduction in Civil Engineering, Tongji University) ;
  • Zhihua Yue (College of Aerospace and Civil Engineering, Harbin Engineering University) ;
  • Yuzhu Wang (Yantai Research Institute of Harbin Engineering University) ;
  • Min He (Yantai Research Institute of Harbin Engineering University) ;
  • Lele Sun (Yantai Research Institute of Harbin Engineering University) ;
  • Xuesong Cai (Yantai Research Institute of Harbin Engineering University)
  • Received : 2023.11.21
  • Accepted : 2024.02.09
  • Published : 2024.07.25

Abstract

This paper introduces a base isolation system-tuned mass damper inerter (BIS-TMDI) hybrid system to the AP1000 nuclear power plant (NPP), which reduces seismic damage potential of the NPP structure. The effects of fluid-structure interaction (FSI) caused by the passive containment cooling system water storage tank (PCCWST) on NPP's seismic performance are investigated. The FSI of water tank theoretical model is considered based on the Housner's model, and a series of time history analyses are performed to prove the rationality of the proposed model. Three single-objective optimization strategies are employed to minimize the relative displacement variance and absolute acceleration variance of the upper structure, as well as the filtered energy index (FEI). Furthermore, a multi-objective optimization strategy considering all these three indexes is proposed to obtain optimal parameters of vibration control. The influence of vibration control strategies on the relative deformation and acceleration of the upper structure is explored with various water level ratios. The analytical results indicate that the proposed BIS-TMDI strategy has significantly reduced the NPP structure's seismic response. The effectiveness of the vibration control strategy is influenced by the water level ratio, emphasizing the significance of designing an appropriate water level ratio to reduce NPP structure's seismic response.

Keywords

Acknowledgement

This work was supported by Heilongjiang Provincial Key Research and Development Plan funded by Heilongjiang Province, China (Department of Science and Technology) (Grant No. 2022ZX01A14), and Leading Scientific Research and Young Talent Project funded by China National Nuclear Corporation, China (Grant No. KY90200210017), and Yantai School-Local Integration Development Program funded by Yantai City, China (Grant No. 22MZ03CD012).

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