Post Irradiation Examination (PIE) of the STIP and MEGAPIE Specimens at JAEA-Hot Lab

Saito, Shigeru   ; Yamashita, Naoki; Sano, Naruto

Beam injection windows and structural materials of spallation neutron sources and accelerator-driven systems (ADS) are damaged by irradiation of high-energy protons and spallation neutrons. In order to clarify the irradiation damage characteristics of materials under spallation conditions, material irradiation programs such as STIP (SINQ Target Irradiation Program) and MEGAPIE (MEGAwatt Pilot Experiment) were conducted. In these programs, various materials were irradiated with 580 MeV protons at PSI. JAEA conducted post irradiation examination (PIEs) of the materials and obtained many irradiation data and findings. These are referred to the lifetime evaluation of the mercury target vessel of SNS and J-PARC-MLF. In this presentation, representative results of these PIEs, as well as experience of each process from irradiation to PIE will be presented. This information can be used as a reference for program of high energy accelerator irradiation and PIEs.