Analysis for thermal mixing experiment in B and C loop using CFD

The benchmark calculation for a thermal mixing experiment in the B and C Loop facility was performed to develop a thermal mixing model in quenching tank using CFX4.4. A steam discharge through the sparger and the condensation phenomenon were modeled with the chocking flow and the steam condensation model to generate the boundary condition of CFX4.4 for the thermal mixing behavior. The transient calculation results in about 20 seconds show a good agreement of the temperature distribution with that of experiment. Therefore, the CFD code with the steam condensation region model can simulate the thermal mixing behavior when the steam is condensed in quenching tank. The numerical model for the thermal mixing taking place for a long time can be developed by this method