Analysis of the 2016 Gyeongju earthquake and the 2017 Pohang earthquake showed the characteristics of a typical high-frequency earthquake with many high-frequency components, short time strong motion duration, and large peak ground acceleration relative to the magnitude of the earthquake. Domestic nuclear power plants were designed and evaluated based on NRC's Regulatory Guide 1.60 design response spectrum, which had a great deal of energy in the low-frequency range. Therefore, nuclear power plants should carry out seismic verification and seismic performance evaluation of systems, structures, and components by reflecting the domestic characteristics of earthquakes. In this study, high-frequency amplification factors that can be used for seismic verification and seismic performance evaluation of nuclear power plant systems, structures, and equipment were analyzed. In order to analyze the high-frequency amplification factor, five sets of seismic time history were generated, which were matched with the uniform hazard response spectrum to reflect the characteristics of domestic earthquake motion. The nuclear power plant was subjected to seismic analysis for the construction of the Korean standard nuclear power plant, OPR1000, which is a reactor building, an auxiliary building assembly, a component cooling water heat exchanger building, and an essential service water building. Based on the results of the seismic analysis, a high-frequency amplification factor was derived upon the calculation of the floor response spectrum of the important locations of nuclear power plants. The high-frequency amplification factor can be effectively used for the seismic verification and seismic performance evaluation of electric equipment which are sensitive to high-frequency earthquakes.

A B S T R A C T
1. 서 론
2. 원자력발전소의 내진해석
    2.1 입력지진
    2.2 원자력발전소의 내진해석
3. 고주파수 증폭계수
4. 결 론
REFERENCES

• 임승현(경북대학교 융복합시스템공학부 플랜트시스템전공) | Eem Seung-Hyun (Major in Plant System Engineering, School of Convergence & Fusion System Engineering, Kyungpook National University)
• 최인길(한국원자력연구원 기계‧구조안전연구부) | Choi In-Kil (Mechanical and Structural Safety Research Division, Korea Atomic Energy Research Institute)
• 전법규(부산대학교 지진방재연구센터) | Jeon Bub-Gyu (Seismic Research and Test Center, Pusan National University)
• 곽신영(한밭대학 교 건설환경공학과) | Kwag Shinyoung (Department of Civil & Environmental Engineering, Hanbat National University) Corresponding author