Nuclear Engineering and Technology

Korean Nuclear Society (한국원자력학회)
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Investigation on damage development of AP1000 nuclear power plant in strong ground motions with numerical simulation

  • Chen, Wanruo (School of Civil Engineering, Guangzhou University) ;
  • Zhang, Yongshan (School of Civil Engineering, Guangzhou University) ;
  • Wang, Dayang (School of Civil Engineering, Guangzhou University) ;
  • Wu, Chengqing (School of Civil Engineering, Guangzhou University)
  • Received : 2018.12.27
  • Accepted : 2019.04.22
  • Published : 2019.09.25
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Abstract

Seismic safety is considered to be one of the key design objectives of AP1000 nuclear power plant (NPP) in strong earthquakes. Dynamic behavior, damage development and aggravation effect are studied in this study for the three main components of AP1000 NPP, namely reinforced concrete shield building (RCSB), steel vessel containment (SVC) and reinforced concrete auxiliary building (RCAB). Characteristics including nonlinear concrete tension and compressive constitutions with plastic damage are employed to establish the numerical model, which is further validated by existing studies. The author investigates three earthquakes and eight input levels with the maximum magnitude of 2.4 g and the results show that the concrete material of both RCSB and RCAB have suffered serious damage in intense earthquakes. Considering RCAB in the whole NPP, significant damage aggravation effect can be detected, which is mainly concentrated at the upper intersection between RCSB and RCAB. SVC and reinforcing bar demonstrate excellent seismic performance with no obvious damage.

Keywords

Acknowledgement

Supported by : National Natural Science Foundation of China, Guangzhou University

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