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直管2重管型蒸気発生器の設計研究,1; SG設計の基本方針と構造概念

Design study of double wall straight tube steam generator, 1; Design concept and structure

木曽原 直之; 池田 博嗣; 佐藤 充*; 飯塚 透*

Kisohara, Naoyuki; Ikeda, Hirotsugu; Sato, Mitsuru*; Iitsuka, Toru*

FBRの実用化に対しては、安全性と経済性に優れたプラント概念の構築が社会的に要求されている。実用化FBRの蒸気発生器では、プラントの安全性を向上させることは勿論のこと、一般公衆が安心できるようにNa・水反応の発生を抑制し、社会的受容性を高めた設計が必要である。この観点に基づいて、2次系設置型の直管2重管型蒸気発生器(直管2重管SG)を選定し、Na水反応防止や構造・熱流動の成立性を考慮して具体的な構造を検討した。

Safety, economy and public acceptance are required for commercialized FBR plant systems. Sodium heated steam generators of the FBRs must satisfy the plant safety and increase the plant availability and the safety impression to the society by decreasing the possibility of Na/water reaction as much as possible. For this purpose, the steam generators of the FBR provide double-wall-heat transfer tubes, and the basic structure of the SG was designed by taking account of Na/water reaction prevention and thermal hydraulic and structural viewpoints.

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