ナトリウム冷却型高速炉用材料開発

Structural materials development for sodium cooled fast reactor

青砥 紀身 

Aoto, Kazumi

原子力機構が鋭意開発を進めている先進的ナトリウム冷却ループ型高速炉(JSFR)には、プラント機能を最大限に発揮させるため、新たな構造材料が開発,適用を予定されている。炉容器には高速炉構造用SUS316が、冷却系配管や主要機器には高クロムフェライト鋼が適用される。ここでは、両鋼種の開発経緯,現況,今後に向けた課題を紹介する。

To demonstrate its expected plant performance, now, JAEA is making efforts to develop some new structural materials for advanced sodium cooled loop type fast reactor(JSFR), which is assiduously being developed by also JAEA. SUS316 fast reactor grade and high chromium ferritic steel developed for fast reactor application will be applied to JSFR's reactor vessel and coolant system containing piping system and several main components. In this report, the history, the present status and the remained problems of their developments are introduced.