1万kWeナトリウム冷却小型高速炉(4S)概念と熱流動特性(NP3 新型炉技術)

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Design study on 10MWe-4S (Super Safe, Small and Simple) reactor is now conducted in addition to the original 50MWe-4S Reactor In this paper, the concept of the 10MWe-4S reactor (4S-10ML) and the thermal hydraulic characteristics of it are described The 4S-10ML reactor introduces a reflector controlled metallic fuel core to enhance passive safety features, and to realize 30 years core lifetime Reactivity temperature coefficients including coolant void reactivity are negative during core lifetime The pressure drop of the core is less than 2 kg/cm^2. The 4S-10ML is a loop type reactor SG, IHXDesign study on 10MLVe-4S (Super Safe, Small and Simple) reactor is now conducted in addition to the original 50MWe-4S Reactor. In this paper, the concept of the 10MWe-4S reactor (4S-10ML) and the thermal hydraulic characteristics of it are described. The 4S-10ML reactor introduces a reflector controlled metallic fuel core to enhance passive safety features, and to realize 30 years core lifetime. Reactivity temperature coefficients including coolant void reactivity are negative during core lifetime. The pressure drop of the core is less than 2 kg/cm^2. The 4S-10ML is a loop type reactor. SG, IHX, primary and secondary EMPs are integrated in one vessel. The decay heat is removed by the air natural convection on the surface of the outside of the vessel and the reactor vessel (SGACS,RVACS). To minimize the building, and to reduce the construction cost, a step mat type and the horizontal seismic isolation system are adopted. The reactor vessel and the integrated component vessel are supported at the upper part, and fixed to the same base mat surface at intervals of 8.1m. An elevation difference between the heat sink (IHX) and the heat source (core) of the primary system of the 4S-10ML reactor is comparatively small. Additionally, there is a possibility for the thermal interaction between RVACS and SGACS. The cooling capability of the 4S-10ML reactor was confirmed by the plant dynamic analysis with "CERES" code developed by CRIEPI. The thermal hydraulic characteristics of 4S-10ML reactor were clarified.
社団法人日本機械学会の論文
2004-06-22

1万kWeナトリウム冷却小型高速炉(4S)概念と熱流動特性(NP3 新型炉技術)

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