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The reviews of the FCI under CDAs in sodium-cooled fast reactor   ZHANG Zhi-gang*, LIU Xing-chao, and YANG Zhi   Fundamental Science on Nuclear Safety and Simulation Technology Laboratory, Harbin Engineering University Number 145, Nantong Street, Harbin 150001, China (zg_zhang@hrbeu.edu.cn)   Abstract: The molten fuel-coolant interaction (FCI) under core disruptive accidents (CDAs) in sodium fast breeder reactor (SFR) is a crucial problem on core safety study internationally. It involves multiphase, multicomponent, deformation and solidification, complex heat and mass transfer problems, which is a crux to assess the post-accident heat removal (PAHR) and core re-cooling ability. The latest experimental and numerical research status of FCI was introduced, especially the molten metal fragmentation mechanism. The sodium entrainment physical model, fragmentation induced by the thermal stress and fragmentation induced by solidification are the major breakthroughs in studying the fragmentation mechanism. Modeling of FCI process using MPS and ISPH numerical methods has made some progression. At the same time, the author summarized the work and the existing problems and made a general outlook about the research directions and trends in the future. Keywords: sodium-cooled fast reactor; FCI; experiment study; numerical simulation
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