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ナトリウム冷却炉の検討

Studies on sodium cooled fast breeder reactor

新部 信昭; 島川 佳郎; 石川 浩康; 早船 浩樹; 久保田 健一; 笠井 重夫; 一宮 正和

Nibe, Nobuaki; Shimakawa, Yoshio; not registered; not registered; not registered; not registered; not registered

ナトリウム冷却大型炉については、国内外に多くの研究・運転実績があり、これに基づく豊富な知見がある。本実用化戦略調査研究では、ループ型炉1概念、タンク型炉3概念について経済性向上を主眼にプラント基本概念の検討を実施した。具体的なコストダウン方策としては、ナトリウムの特長を活かした機器の大型化、系統数削減、機器の集合・合体化などを採用している。これらの革新的な設計については、その技術的成立性に関して更なる確認を必要とするが、いずれの炉型においても経済性目標(20万円/kWe)を達成できる見通しが得られた。また、ナトリウム炉の更なる経済性向上策として、以下の項目を抽出しコストダウンの可能性を検討した。・更なる高温・高効率化追求・建設工期短縮・検出系高度化による安全系局限化・SG-ACS

Large sized sodium-cooled fast breeder reactors of large-size are being studied and have been operated in Japan and many countries. ln this feasibility study, evaluation was made on technical feasibinty for design concepts or 1 loop type and 3 pool types, specially from the viewpoint of improvement of economical competence. The design concepts include the ideas of cost reduction measures such as large-scaled components, reduction of loop number and integration of components on the basic of utilization of sodium characteristics. From the results of the evaluation, it may be possible for all the concepts to attain the economical target of 200 thousands yen per kilowatt, though further confirmation should be made for technical feasibility of those concepts. ln addition, the following items were listed up as further cost-reduction measures. (1)Higher temperature cooling system and steam cycle efficiency (2)Shortening of construction term (3)Reduction of safety systems by using measuring instruments with high performmce (4)Adoption of SG-ACS

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