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NUMERICAL INVESTIGATION OF MASS AND HEAT TRANSFER IN SODIUM POOL COMBUSTION

pages 405-412
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The liquid sodium is a coolant of a fast reactor and its combustion is evaluated in the safety analysis. Sodium combustion is a coupled phenomenon of thermalhydraulics and chemical reaction. This paper presents the numerical investigation of the thermalhydraulic and chemical characteristics of the sodium pool combustion using a flame sheet model. The boundary layer equations are solved to obtain the thermalhydraulic field above the pool surface. The chemical reaction is evaluated with the chemical equilibrium model using Gibbs free energy minimization method. The chemical reaction and mass and heat transfer are solved interactively considering radiation heat transfer and behavior of reaction product aerosols. Numerical results are compared with sodium pool combustion experiments. Future research needs are estimation of the absorption coefficient of aerosols and measurement of the temperature and chemical species distribution in vicinity of the flame for validating the present model.

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