Nuclear Engineering and Technology

Korean Nuclear Society (한국원자력학회)
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Investigation on damage assessment of fiber-reinforced prestressed concrete containment under temperature and subsequent internal pressure

  • Zhi Zheng (College of Civil Engineering, Taiyuan University of Technology) ;
  • Yong Wang (College of Civil Engineering, Taiyuan University of Technology) ;
  • Shuai Huang (College of Civil Engineering, Taiyuan University of Technology) ;
  • Xiaolan Pan (College of Civil Engineering, Taiyuan University of Technology) ;
  • Chunyang Su (College of Civil Engineering, Taiyuan University of Technology) ;
  • Ye Sun (College of Civil Engineering, Taiyuan University of Technology)
  • Received : 2022.10.30
  • Accepted : 2023.02.26
  • Published : 2023.06.25
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Abstract

Following a loss of coolant accident (LOCA), prestressing concrete containment vessels (PCCVs) may experience high thermal load as well as internal pressure. The high temperature stress would increase the risk of premature damage to the containment, which reduces the safety margin during the increasing internal pressure. However, current investigations cannot clearly address the issues of thermal-pressure coupling effect on damage propagation and thus safety of the containment. Thus, this paper offers three simple and powerful damage parameters to differentiate the severity of damage of the containment. Moreover, despite of the temperature action severely threatening the pressure performance of the containment, the research regarding the improvement of the resistant performance of the containment is quite scarce. Therefore, in this paper, a comprehensive comparison of damage propagation and mechanism between conventional and fiber-reinforced concrete (FRC) containments is performed. The effects of fiber characteristics parameters on damage propagation of structures following the LOCA are also specifically revealed. It is found that the proposed damage indices can properly indicate state of damage in the containment body and the addition of fiber can be used to obviously mitigate the damage propagation in PCCV considering the thermal-pressure coupling.

Keywords

Acknowledgement

This investigation is supported by National Natural Science Foundation of China (No. 51908397, 52208191), Shanxi Province Science Foundation for Youths (No. 201901D211025), China Postdoctoral Science Foundation (No. 2019M651075, No. 2020M670695). These supports are greatly appreciated.

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