Feasibility study on the seismic isolation of pool-type LMFBR 1. Horizontal seismic isolation of Nuclear Island Building

In case of pool-type liquid metal fast breeder reactors (LMFBRs), structural design is strongly influenced by the seismic loads because the operational coolant pressure is relatively low. This is one of the important differences of LMFBRs from light water reactors from the viewpoint of structural design. Therefore, the reduction of seismic force will be of great assistance for attaining a simple and lightweight LMFBR, especially when stringent seismic conditions are imposed as in Japan.