In Korea, most nuclear power plants were designed based on the design response spectrum of Regulatory Guide 1.60 of the NRC. However, in the case of earthquakes occurring in the country, the characteristics of seismic motions in Korea and the design response spectrum differed. The seismic motion in Korea had a higher spectral acceleration in the high-frequency range compared to the design response spectrum. The seismic capacity may be reduced when evaluating the seismic performance of the equipment with high-frequency earthquakes compared with what is evaluated by the design response spectrum for the equipment with a high natural frequency. Therefore, EPRI proposed the inelastic energy absorption factor for the equipment anchorage. In this study, the seismic performance of welding anchorage was evaluated by considering domestic seismic characteristics and EPRI's inelastic energy absorption factor. In order to reflect the characteristics of domestic earthquakes, the uniform hazard response spectrum (UHRS) of Uljin was used. Moreover, the seismic performance of the equipment was evaluated with a design response spectrum of R.G.1.60 and a uniform hazard response spectrum (UHRS) as seismic inputs. As a result, it was confirmed that the seismic performance of the weld anchorage could be increased when the inelastic energy absorption factor is used. Also, a comparative analysis was performed on the seismic capacity of the anchorage of equipment by the welding and the extended bolt.

1. 서 론
2. 용접 정착부의 비탄성에너지 흡수계수
3. 캐비닛의 내진성능
    3.1 대상 기기 및 입력지진
    3.2 용접에 의해 정착된 캐비닛의 지진취약도 곡선
    3.3 용접 정착부의 CASE별 비교ㆍ분석
    3.4 용접 정착부와 확장형 앵커 정착부에 대한 내진성능 비교 및논의
4. 결 론
감사의 글
REFERENCES

• 임승현(경북대학교 융복합시스템공학과 플랜트시스템전공 조교수) | Eem Seunghyun (Assistant Professor, Major in Plant System Engineering, Department of Convergence & Fusion System Engineering, Kyungpook National University)
• 김건규(경북대학교 융복합시스템공학과 플랜트시스템전공 석사과정) | Kim Gungyu (Graduate Student, Major in Plant System Engineering, Department of Convergence & Fusion System Engineering, Kyungpook National University)
• 최인길(한국원자력연구원 첨단구조·지진안전연구부 책임연구원) | Choi In-Kil (Principal Researcher, Advanced Structures and Seismic Safety Research Division, Korea Atomic Energy Research Institute)
• 곽신영(한밭대학교 건설환경공학과 조교수) | Kwag Shinyoung (Assistant Professor, Department of Civil & Environmental Engineering, Hanbat National University) Corresponding author