Design of Small Size Laminated Rubber Bearings Applicable for Seismic Isolation of Individual Nuclear Components

These efforts in Korea are basically on the concept of whole seismic isolation for nuclear island including reactor building with large size LRBs. To confirm and give a credit for large size LRB application for nuclear island, it is necessary to be incubated with further technologies and test data. In this paper, the design of the small size LRBs are designed and the specifications are proposed to be used for a seismic isolation of individual nuclear components. Actually, it is known that the design of small size LRB is more difficult to design, fabricate and substantiate its performance. Four types of LRB size are designed in this paper with target capacities of vertical weight as 1 ton, 2 tons, 5tons and 10tons. In this paper, the small size LRB are designed and proposed the design specifications for a purpose of seismic isolation of individual nuclear components. The manufacturability of the small sized LRB is already investigated by the vendor but the performance tests should be performed to validate the design specifications.