Nuclear Science and Techniques

《核技术》(英文版) ISSN 1001-8042 CN 31-1559/TL     2019 Impact factor 1.556

Nuclear Science and Techniques ›› 2007, Vol. 18 ›› Issue (4): 242 doi: 10.1016/S1001-8042(07)60054-2

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Simulation of the mixing process in FCIs with hydrodynamic fragmentation model

LIN Qian CAO Xuewu   

  1. School of Nuclear Science and Engineering, Shanghai Jiaotong University, Shanghai 200240, China
LIN Qian CAO Xuewu. Simulation of the mixing process in FCIs with hydrodynamic fragmentation model.Nuclear Science and Techniques, 2007, 18(4): 242     doi: 10.1016/S1001-8042(07)60054-2
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Abstract: Fuel Coolant Interactions (FCIs) are important issues in nuclear reactor severe accident analysis. In FCIs, fragmentation model of molten droplets is a key factor to estimate degree of possible damage. In this paper, the mixing process in FCIs is studied by the simulation of MIXA experiment with hydrodynamic fragmentation model. The result shows that hydrodynamic fragmentation model underestimates the fragmentation rate of high temperature molten droplets under the condition of low Weber numbers. It is concluded that models based on thermal fragmentation mechanism should be adopted to analyze the FCI process and its consequence.

Key words: Severe accident, FCI, Molten fuel droplet, Fragmentation, MIXA