Joining techniques development for neutron irradiation tests and post irradiation examinations in JMTR-HL

JMTR-HLにおける照射技術及び照射後試験に関する接合技術開発

田口 剛俊 ; 稲葉 良知  ; 川又 一夫; 中川 哲也; 土谷 邦彦 

Taguchi, Taketoshi; Inaba, Yoshitomo; Kawamata, Kazuo; Nakagawa, Tetsuya; Tsuchiya, Kunihiko

JMTRホットラボは、JMTRと直接カナルと繋がっているため、短い時間で効率的に照射された照射キャプセルをJMTRホットラボに移動できる。照射試験及び照射後試験技術開発の一環として、(1)FPガス圧力計・中心温度測定用熱電対を計装する再計装技術,(2)照射済の材料試料をキャプセルに封入して再度照射を行うための組立て技術,(3)特殊照射キャプセルのための異種接合材の開発,(4)照射済材料の溶接及び試験片加工技術などのさまざまな溶接技術開発を行った。本発表では、これらの溶接技術や開発中の照射後試験を紹介する。

The JMTR-HL is directly connected with reactor core by a water canal. Hence irradiated radioactive capsules are efficiently transported under water through the canal in a short time. As the part of PIE technology development, several kinds of welding techniques have been systematically developed. These techniques are as follows; (1) re-instrumentation of FP gas pressure gauge and thermocouple to an irradiated fuel rod, (2) welding procedure development for re-capsuling of irradiated materials, (3) joining technique and PIEs development of different materials with friction welding for new typed irradiation capsules and (4) rewelding with irradiated and un-irradiated materials and fabrication of test specimen with the rewelding for fusion reactor development. These welding techniques have been very indispensable for supporting the irradiation tests and post-irradiation examinations and were introduced in this seminar.