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Development of transfer pot for JSFR ex-vessel fuel handling

JSFR炉外燃料取扱用移送ポットの開発

平田 慎吾; 近澤 佳隆; 加藤 篤志; 宇都 成昭; 小幡 宏幸*; 小竹 庄司*

Hirata, Shingo; Chikazawa, Yoshitaka; Kato, Atsushi; Uto, Nariaki; Obata, Hiroyuki*; Kotake, Shoji*

高速増殖炉サイクル実用化研究開発(FaCTプロジェクト)では、システム簡素化のための燃料取扱系の開発を進めている。炉外燃料取扱については、燃料交換時間を短縮し稼働率を向上するために、コンパクト化原子炉容器に適合した燃料集合体を2体同時に移送できる2集合体移送ポットを開発している。燃料集合体2体同時移送において、移送系の故障等に対しても収納した燃料を制限温度内に抑え除熱成立性を確認するための試験及び解析研究について示す。

In Fast Reactor Cycle Technology Development (FaCT) project, Japan Sodium-cooled Fast Reactor (JSFR) is going to adopt an advanced fuel handling system. As for ex-vessel spent fuel handling, a pot which contains two fuel subassemblies simultaneously and is applicable size to compact reactor vessel, has been developing so as to shorten a refueling period leading to an improvement of plant availability. The pot is required to provide sufficient cooling capability even in case of transportation malfunction during transportation of spent fuel subassemblies with high decay heat. In the present study, experimental and analytical studies to evaluate the cooling capacity of the pot are summarized.

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