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Establishment of the disassembling technique of the driver fuel assembly irradiated in JOYO

燃料ピンの再装荷を考慮した「常陽」炉心燃料集合体の解体手法の高度化

市川 正一; 芳賀 広行; 勝山 幸三 ; 前田 宏治  ; 永峯 剛

Ichikawa, Shoichi; Haga, Hiroyuki; Katsuyama, Kozo; Maeda, Koji; Nagamine, Tsuyoshi

「常陽」炉心燃料集合体の照射済み燃料ピンを再照射するため、炉心燃料集合体の解体手法の改良を行った。今回の炉心燃料集合体の解体手法の高度化により、継続照射用燃料ピンとして、照射済み燃料ピンを多数採取することが可能となった。本解体手法を応用することで高燃焼度の照射燃料ピンのデータ取得の可能性を得た。

A disassembling technique for the JOYO driver fuel assembly has been established at the Fuel Monitoring Facility in JAEA. This technique made it possible to remove the fuel pins from the driver fuel assembly without fuel pin sectioning. After disassembling, some selected fuel pins can be reassembled into a new irradiation vehicle for continuous irradiation in JOYO. This technique allows the irradiation data of high burn-up fuel and high neutron dose material to be obtained.

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