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Simulation of the mixing process in FCIs with hydrodynamic fragmentation model

Simulation of the mixing process in FCIs with hydrodynamic fragmentation model
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摘要 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. 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.
作者 LIN Qian CAO Xuewu
机构地区 School of Nuclear Science and Engineering
出处 《Nuclear Science and Techniques》 SCIE CAS CSCD 2007年第4期242-246,共5页 核技术（英文）
基金 National Natural Science Foundation of China (No.50576050)
关键词 核反应堆 燃料冷冻作用 事故 燃料熔化 Severe accident, FCI, Molten fuel droplet, Fragmentation, MIXA
分类号 TL364.4 [核科学技术—核技术及应用]
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参考文献10

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Nuclear Science and Techniques
2007年 第4期

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