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France/Japan synthesis concept on sodium cooled fast reactor - Core and safety

Abstract : France (CEA and FRAMATOME) and Japan (JAEA, MFBR and MHI) have carried out collaborative works to reach common technical view regarding sodium-cooled fast reactor (SFR) concept through the implementation of France-Japan technical Working Groups. The present paper describes the collaborative activities on core and safety, for which the feasibility of ASTRID600 to qualify SFR techniques toward to commercialization. Japan has investigated the feasibility of enhanced high burnup core and fuel using Oxide Dispersion-Strengthened steel cladding on ASTRID600, considering Japanese core performance targets. In case of applying the French safety requirements and partly relaxed design targets, it has been clarified the high burn-up low-void-effect (CFV) core is feasible in Japan. Regarding passive shutdown capabilities, a preliminary analysis has been performed regarding Self-Actuated Shutdown System (SASS), that is a complementary safety device (CSD) in Japanese safety approach, for ASTRID600 in place of RBH (hydraulically suspended absorber rod, that is a CSD in French safety approach) in order to investigate a potential as the common design. The preliminary analysis showed good confidence on ability of SASS to satisfy main requirements. The mitigation measures of ASTRID600 against severe accidents, such as core catcher and molten corium discharge assembly, as well as the sodium void reactivity features of the CFV core, were appreciated to be prospective for IVR (In-Vessel Retention) strategy in both countries. For ASTRID150 with a reduced reactor power and enhanced experimental capabilities, specific items have been identified to achieve qualification data necessary for the future commercial SFR according to French and Japanese strategies on core and safety.
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Contributor : Bibliothèque Cadarache <>
Submitted on : Wednesday, May 20, 2020 - 11:29:01 AM
Last modification on : Thursday, May 21, 2020 - 1:16:15 AM


  • HAL Id : cea-02613621, version 1




K. Takano, S. Ohki, T. Ozawa, H. Yamano, S. Kubo, et al.. France/Japan synthesis concept on sodium cooled fast reactor - Core and safety. ICAPP 2020, Mar 2020, Abu Dhabi, United Arab Emirates. ⟨cea-02613621⟩



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