Program of in-pile IASCC testing under the simulated actual plant condition. Development of technique for in-pile IASCC growth test in JMTR

The irradiation assisted stress corrosion cracking (IASCC) is one of the major concerns on the integrity of in-core materials not only for the light water reactors (LWRs) but also for the materials to be cooled by water in fusion reactor. Since the synergies of radiation and stress/water can not be reproduced outside reactor core, the in-pile IASCC testing is one of the key experiments to understand IASCC behavior. A high temperature water loop facility was, therefore, installed at the Japan Materials Testing Reactor (JMTR) to carry out the in-core testing. And research and development of several techniques for performing the in-pile IASCC testing have been conducted. This paper describes the current status of the development of several techniques for in-pile IASCC growth test in JMTR. (author)