Nuclear Engineering and Technology

Korean Nuclear Society (한국원자력학회)
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Mitigation of seismic responses of actual nuclear piping by a newly developed tuned mass damper device

  • Kwag, Shinyoung (Department of Civil and Environmental Engineering, Hanbat National University) ;
  • Eem, Seunghyun (Department of Conversion & Fusion System Engineering, Major in Plant System Engineering, Kyungpook National University) ;
  • Kwak, Jinsung (Korea Atomic Energy Research Institute) ;
  • Lee, Hwanho (Korea Atomic Energy Research Institute) ;
  • Oh, Jinho (Korea Atomic Energy Research Institute) ;
  • Koo, Gyeong-Hoi (Korea Atomic Energy Research Institute)
  • Received : 2020.11.05
  • Accepted : 2021.02.09
  • Published : 2021.08.25
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Abstract

The purpose of this study is to reduce seismic responses of an actual nuclear piping system using a tuned mass damper (TMD) device. A numerical piping model was developed and validated based on shaking table test results with actual nuclear piping. A TMD for nuclear piping was newly devised in this work. A TMD shape design suitable for nuclear piping systems was conducted, and its operating performance was verified after manufacturing. The response reduction performance of the developed TMD under earthquake loading on actual piping was investigated. Results confirmed that, on average, seismic response reduction rates of 34% in the maximum acceleration response, 41% in the root mean square acceleration response, and 57% in the spectral acceleration response were shown through the TMD application. This developed TMD operated successfully within the seismic response reduction rate of existing TMD optimum design values. Therefore, the developed TMD and dynamic interpretation help improve the nuclear piping's seismic performance.

Keywords

Acknowledgement

This study was supported by the Ministry of Trade, Industry and Energy through KETEP (Korea Institute of Energy Technology Evaluation Planning) (No. 20181510102380). The first author appreciates the financial support of the National Research Foundation of Korea (NRF) grant funded by the Korea government (Ministry of Science and ICT) (No. 2020R1G1A1005510).

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