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Safety design approach of Japan sodium-cooled fast reactor

JSFRの安全設計アプローチ

中井 良大 ; 堺 公明; 岡野 靖

Nakai, Ryodai; Sakai, Takaaki; Okano, Yasushi

本論文はFaCTプロジェクトにおいて設計されているJSFRの安全設計アプローチを述べたものである。基本的な安全アプローチは深層防護の概念を適用し、ナトリウム冷却高速炉の特性を考慮し次世代炉の安全目標を満足するものである。深層防護のレベル1から3の対策に加えてレベル4において炉心損傷事故を防止と緩和の対策を行う。再臨界回避と炉内終息の概念とし、格納容器に対する負荷を軽減し、大型のナトリウム冷却高速炉の実用化に重要な役割を果たす。

This paper describes the safety design approach of Japan Sodium-cooled Fast Reactor (JSFR), which is designed in FaCT project. The basic safety approach is to satisfy the safety goal for next generation reactor taking into account characteristics of sodium fast reactor (SFR) with applying the concept of defence-in-depth (DiD). In addition to the provisions for DiD levels 1-3, design measures to prevent and mitigate core disruptive accident (CDA) are assigned as provisions for in DiD level 4. The re-criticality free/IVR concept makes less design impact on the containment and is essential for a large SFR commercialization.

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