ICONE23-1359 INVESTIGATION ON ULTIMATE STRENGTH OF THIN WALL TEE PIPE FOR SODIUM COOLED FAST REACTOR UNDER SEISMIC LOADING

It is important to investigate failure mode and ultimate strength of piping components in order to evaluate seismic integrity of piping. Many failure tests of a thick wall and a high pressure piping for Light Water Reactors (LWRs) have been conducted, and the results suggest that the failure mode which should be considered in the design of a thick wall piping for LWRs under seismic loading is low cycle fatigue. On the other hands, the piping in Sodium cooled Fast Reactors (SFRs) is a thin wall configuration compared to the piping in LWRs. Failure tests of a thin wall piping is necessary because the past failure tests for the piping in LWRs are not enough to discuss failure behavior of a thin wall piping. This present work investigated the failure mode and the ultimate strength of a thin wall tees, the critical parts in seismic evaluation of the actual piping of SFRs.