금속연료 소듐냉각고속로 중대사고 고유안전특성 SAS4A/SASSYS-1 코드 전산해석

다국어 초록 (Multilingual Abstract)

The inherent safety characteristics of the metal fuel core sodium-cooled fast reactor (SFR) are investigated using the SAS4A metal fuel version code, originally developed for the analysis of postulated severe accidents in oxide fuel SFR and significantly extended to allow the mechanistic analysis of severe accidents in metallic fuel SFRs. The paper provides an overview of the SAS4A key metal fuel models and the safety characteristics of the metal fuels. The analysis is performed for a postulated unprotected fuel assembly inlet blockage accident in the metal fuel Prototype Gen-IV Sodium Fast Reactor (PGSFR). The evolution of local fuel components during the pre-transient irradiation, molten fuel relocation behavior inside and outside of cladding, and their impacts on reactivity and power history during the transient are numerically analyzed. The favorable characteristics of the metal fuel, significant decreases in reactivity and power due to favorable molten fuel relocation and the fuel thermo-physical property change, are analyzed in the results.

참고문헌 (Reference)

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