응답스펙트럼해석과 시간이력해석을 이용한 SMR 수중 철제 격납용기의 내진응답 비교
Comparison of Seismic Responses of a SMR Submerged Steel Containment Vessel Using Response Spectrum and Time-History Analyses
The steel containment vessel of the NuScale small modular reactor (SMR) is designed to operate under submerged conditions, which influences its dynamic behavior during seismic events. Under such conditions, the interaction between the surrounding water and the containment structure plays an important role in the seismic response. In this study, seismic analyses of a submerged containment vessel are conducted using response spectrum analysis and time-history analysis. The results from the two methods are compared to examine the effects of fluid–structure interaction on the dynamic response. It is observed that the seismic responses under submerged conditions may exceed those under dry conditions due to hydrodynamic effects, including added mass and sloshing. These results indicate that fluid–structure interaction should be considered in the seismic analysis of submerged containment vessels.