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Progress on the plant design concept of sodium-cooled fast reactor

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菱田 正彦; 村上 勤; 此村 守; 戸田 幹雄*

Hishida, Masahiko; Murakami, Tsutomu; Konomura, Mamoru; Toda, Mikio*

実用化戦略調査研究では、開発目標を達成するようJSFRと名づけられたNa冷却高速炉の革新的な概念が構築され、改善されてきている。この改善概念には、Na-水反応に対する安全性を向上させることのできる直管二重管型の蒸気発生器が採用されている。更に、この蒸気発生器に適した崩壊熱除去系が選定されるとともに、保守・補修性の改善も行われている。この検討の結果、安全性及び経済性に関するプラント概念成立性が評価され、見通しが得られている。

An innovative concept of sodium-cooled fast reactor, named JNC Sodium Cooled FR (JSFR) has been created and modified through the Feasibility Study on Commercialized FR Cycle System, aiming at full satisfaction of the development targets. A modified concept of JSFR applied double-wall straight tube type steam generator (SG) which is excelling in safety for sodium-water reaction has been developed. In addition, decay heat removal system suitable for the straight tube SG has been selected and in-service inspection and repair capabilities have been improved. As the result of this study, the potential to realize this plant concept has been obtained through evaluation concerning safety and economics.

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