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Overview of refurbishment project of JMTR

JMTR改修プロジェクトの概要

出雲 寛互; 堀 直彦 ; 神永 雅紀  ; 楠 剛 ; 石原 正博 ; 小森 芳廣 ; 鈴木 雅秀; 河村 弘

Izumo, Hironobu; Hori, Naohiko; Kaminaga, Masanori; Kusunoki, Tsuyoshi; Ishihara, Masahiro; Komori, Yoshihiro; Suzuki, Masahide; Kawamura, Hiroshi

JMTR原子炉施設の改修は、原子炉機器等の一部更新と照射設備の整備からなり、計画通りに遂行された。原子炉機器等の一部更新に関しては、経年変化に関する調査を行ったうえで、今後更新が必要になるかどうか、安全上重要な機器かどうか、整備に長期間を要するかどうか、保守を行う際に交換部品の入手が困難とならないかなどの安全確保及び稼働率向上を観点に選定した。照射設備に関しては、新たなニーズに対応するため、軽水炉材料、燃料等の照射設備を行った。また、新たなプロジェクトにより、医療用RIの製造設備の整備などを行っている。再稼働後は、原子力研究開発の基盤として国際的に貢献していく。

The refurbishment project of the JMTR was promoted with two subjects, the one was the replacement of reactor components, and the other was the construction of new irradiation facilities. On the replacement of reactor components, an investigation on aged components was carried out, for concrete structures, tanks, tubes in order to identify their integrity. After the investigation, some components were decided to replace from viewpoints of future maintenance and improvement of reliability. On the construction of new irradiation facilities, corresponding to the user's irradiation request, new irradiation facilities, such as for LWRs materials or fuels, were installed. Furthermore, new project was selected in order to install new irradiation facilities, such as for $$^{99}$$Mo production and PIE equipments. The new JMTR will contribute the promotion on research and development of the nuclear energy from basic to applied fields as an internationally utilized facility.

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