Nuclear Engineering and Technology

Korean Nuclear Society (한국원자력학회)
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An efficient seismic analysis technique for PCSG assembly using sub-structuring method and homogenization method

  • Gyogeun Youn (SMART System Development Division, Korea Atomic Energy Research Institute) ;
  • Wanjae Jang (Department of Mechanical Engineering, Kumoh National Institute of Technology) ;
  • Gyu Mahn Lee (SMART System Development Division, Korea Atomic Energy Research Institute) ;
  • Kwanghyun Ahn (SMART System Development Division, Korea Atomic Energy Research Institute) ;
  • Seongmin Chang (School of Mechanical Engineering, Chungnam National University)
  • Received : 2023.11.23
  • Accepted : 2024.01.14
  • Published : 2024.06.25
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Abstract

This study significantly reduced the seismic analysis time of PCSG assembly by introducing a reduced model using homogenization and sub-structuring methods. The homogenization method was applied to the primary and secondary micro-channel sheets, and the sub-structuring method was applied to the PCSG module sets. Modal analysis and frequency response analysis were then performed to validate the accuracy of the reduced model. The analysis results were compared with the full model and it was confirmed that the reduced model provided almost the same analysis results as the full model. To verify the computational efficiency of the reduced model, the computational time was then compared with the full model, and it was confirmed that the modal analysis time was reduced by 3.42 times and the frequency response analysis time was reduced by 4.59 times.

Keywords

Acknowledgement

This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIT) (NRF-2020M2D7A1079180 and RS-2023-00278230).

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