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Simulation of the mixing process in FCIs with hydrodynamic fragmentation model

MISCELLANEOUS

Simulation of the mixing process in FCIs with hydrodynamic fragmentation model

LIN Qian
CAO Xuewu
Nuclear Science and TechniquesVol.18, No.4pp.242-246Published in print 20 Aug 2007
50900

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.

Severe accidentFCIMolten fuel dropletFragmentationMIXA
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