Post irradiation examinations for materials irradiated in Joyo

大洗研究所における「常陽」照射材料の照射後試験機能

静川 裕太 ; 関尾 佳弘  ; 岡 弘   ; 丹野 敬嗣  ; 矢野 康英  ; 舘 義昭  ; 大塚 智史   ; 皆藤 威二 

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

照射材料試験施設(MMF)では高速実験炉「常陽」で照射した長寿命炉心材料, 構造材料及び制御材料に対する様々な照射後試験を実施しており、オーステナイト鋼やODS鋼を含めた耐照射性フェライト鋼, BC等の高速炉材料の機械的特性, 微細組織観察及び物理的特性に照射が与える影響を明らかにしてきている。MMFでは「常陽」で照射されたドライバーや燃料集合体のラッパ管から様々な形状の試験片を採取し、ホットセル内の引張試験機, ミニチュアシャルピー, TEMなどの装置を用いて試験を行うことが可能である。本発表ではMMFで照射後試験を行うことができる試験機器の詳細と代表的なデータの例を紹介する。

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.