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燃料デブリの臨界特性を明らかにする定常臨界実験装置STACY更新炉の整備,4; 炉心への試料装荷装置の炉心パラメータへの影響評価

Modification of STACY for study of criticality characteristics of fuel debris, 4; Evaluation of the effect of the sample loading instrument in the reactor core on the core parameters

新垣 優; 井澤 一彦 ; 郡司 智  ; 荒木 祥平   ; 須山 賢也

Arakaki, Yu; Izawa, Kazuhiko; Gunji, Satoshi; Araki, Shohei; Suyama, Kenya

燃料デブリの臨界特性を実験的に明らかにするために、定常臨界実験装置STACY更新炉の整備を進めている。STACYの炉心には任意の検出器や放射化試料等を配置することができるが、それらは規制当局の許可を得た鞘管(内挿管)の中に収めることが求められる。STACY更新炉における実験で用いる内挿管の設計検討の状況について報告する。

JAEA has been modifying the Static Experiment Critical Facility (STACY) to experimentally study on the criticality characteristics of fuel debris. Although arbitrary detectors or activation samples can be placed in the core of STACY, they must be contained in sheath tubes (insertion tubes) that have been approved by the regulatory authorities. This report presents the status of the design study of the insertion tube for the experiments in the modified STACY.

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