Post irradiation examinations for materials irradiated in Joyo

Shizukawa, Yuta ; Sekio, Yoshihiro  ; Oka, Hiroshi   ; Tanno, Takashi  ; Yano, Yasuhide  ; Tachi, Yoshiaki  ; Otsuka, Satoshi   ; Kaito, Takeji 

In JAEA's Materials Monitoring Facility (MMF), various post-irradiation examination (PIEs) have been carried out on the long-life core, structural and absorber materials irradiated in the experimental fast reactor Joyo. The PIEs have revealed many important technological insights, i.e. the effects of irradiation on mechanical properties, microstructures, and physical properties of fast reactor materials such as modified austenitic steel, radiation-resistant ferritic steels including oxide dispersion strengthened (ODS) steel, BC, and so on. The test specimens loaded and irradiated in material irradiation rig of Joyo can be tested in the hot-cell of MMF. In addition, the various samples could be machined from the wrapper tubes of driver and fuel test subassemblies irradiated in Joyo using by an electrical discharge machine (EDM). These samples can be characterized using the equipment such as tensile, miniature Charpy and TEM in the hot cell of MMF. In this presentation, we will introduce the details of feasible PIE equipment in the hot-cell of MMF, and examples of typical PIE data acquired by these equipment.