| Budget Amount *help |
¥8,840,000 (Direct Cost: ¥6,800,000、Indirect Cost: ¥2,040,000)
Fiscal Year 2023: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
Fiscal Year 2022: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
Fiscal Year 2021: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
Fiscal Year 2020: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
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| Outline of Final Research Achievements |
Post severe accident management concept of supercritical water-cooled fast reactor (Super FR) has been developed with multi-physics modeling, covering the core neutronics, thermal-hydraulics, the plant safety analyses and the molten core material behavior analyses. It was anticipated that due to the low boiling point of water under atmospheric pressure, the entire core would melt down and relocate to the bottom of the Reactor Pressure Vessel (RPV). A new concept to avoid re-criticality has been developed through core design and criticality evaluation of the fuel debris. Comprehensive relationships between the core design parameters, the core performance and the debris re-criticality has been clarified. New research issues of MPS method for crust modeling has also been identified with a possible solution.
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