Development of the PCRV steam generator cavity closure for the GCFR

Abstract One phase of the program to develop a prestressed concrete reactor vessel for the gas-cooled fast reactor consists of the design, analysis and testing of models of the steam generator cavity and central core cavity closure . The analytical and experimental results for a 1 15 - scale model of the steam generator cavity closure plug will be presented. This test which is designed to measure pressure response and ultimate capacity of the plug will be followed by tests of 1 4 - scale models to provide design verification of the combined plug, seal and toggle-type hold-down system response.