Journal of the Earthquake Engineering Society of Korea (한국지진공학회논문집)

Earthquake Engineering Society of Korea (한국지진공학회)
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Assessment of Seismic Response Spatial Variation Through the Analysis of Earthquake Records at Hamaoka Nuclear Power Plant

하마오카 원자력 발전소 지진 기록 분석을 통한 지진응답의 공간적 변화 평가

  • Ji, Hae Yeon (Advanced Structures and Seismic Safety Research Division, Korea Atomic Energy Research Institute) ;
  • Ha, Jeong Gon (Advanced Structures and Seismic Safety Research Division, Korea Atomic Energy Research Institute) ;
  • Kim, Min Kyu (Advanced Structures and Seismic Safety Research Division, Korea Atomic Energy) ;
  • Hahm, Dae Gi (Advanced Structures and Seismic Safety Research Division, Korea Atomic Energy)
  • 지혜연 (한국원자력연구원 첨단구조.지진안전연구부) ;
  • 하정곤 (한국원자력연구원 첨단구조.지진안전연구부) ;
  • 김민규 (한국원자력연구원 첨단구조.지진안전연구부) ;
  • 함대기 (한국원자력연구원 첨단구조.지진안전연구부)
  • Received : 2022.04.26
  • Accepted : 2022.06.14
  • Published : 2022.09.01
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Abstract

In assessing the seismic safety of nuclear power plants, it is essential to analyze the structures using the observed ground motion. In particular, spatial variation in which the characteristics of the ground motion record differ may occur if the location is different within the site and even if the same earthquake is experienced. This study analyzed the spatial variation characteristics of the ground motion observed at the structure and site using the earthquake records measured at the Hamaoka nuclear power plant. Even if they were located on the same floor within the same unit, there was a difference in response depending on the location. In addition, amplification was observed in Unit 5 compared to other units, which was due to the rock layer having a slower shear wave velocity than the surrounding bedrock. Significant differences were also found in the records of the structure's foundation and the free-field surface. Based on these results, the necessity of considering spatial variation in the observed records was suggested.

Keywords

Acknowledgement

본 연구는 산업통상자원부 고리1호기기기·설비활용원전안전기술실증사업( 20217910100150) 의 지원에 의해 수행되었습니다

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