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NSRRにおけるカプセル装荷装置B型の設計・製作(受託研究)

Development of type-B capsule loader in the NSRR (Contract research)

村松 靖之; 大河原 正美; 鈴木 寿之; 柴田 功; 更田 豊志

Muramatsu, Yasuyuki; Okawara, Masami; Suzuki, Toshiyuki; Shibata, Isao; Fuketa, Toyoshi

原子炉安全性研究炉NSRR(Nuclear Safety Research Reactor)では、燃料等安全高度化対策の一環として、高燃焼度酸化ウラン燃料及びプルトニウム-ウラン混合酸化物燃料(MOX燃料)を用いた照射実験を行う。この照射実験を行う際に照射カプセルの移動及び炉心への装荷にカプセル装荷装置を使用するが、既存の装荷装置では高燃焼MOXには対応できないため、中性子遮へい能力を強化し、さらに新型の高圧水カプセルにも対応したカプセル装荷装置B型を設計・製作した。

As a part of Advanced LWR Fuel Performance and Safety Research Program, irradiation experiments are conducted with high burnup uranium dioxide fuel and uranium-plutonium mixed oxide (MOX) fuel in the Nuclear Safety Research Reactor. When an irradiation capsule is transferred and loaded to the reactor core, a capsule loader is used. The previous capsule loader, however, could not have enough shielding capability against neutron flux from high burnup MOX fuel. In order to fulfill the requirement and to handle a new high pressure water capsule, accordingly, a type-B capsule loader was developed.

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