THREE-DIMENSIONAL THERMAL HYDRAULIC TRANSIENT AND STEAD-STATE CALCULATIONS FOR PRESSURIZED THERMAL SHOCK MIXING EXPERIMENTS.
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During an overcooling transient in a pressurized water reactor, the cold water from the high pressure safety system is injected into the hot primary coolant in the cold leg. This may cause the water temperature in the cold leg and downcomer annulus to decrease and hence the concern of pressurized thermal shock problem arises. A multi-dimensional numerical study for the analysis of the EPRI/CREARE one-fifth scale mixing test is performed. A new accurate stable mass-flow-weighted skew-upwind scheme is employed in the finite difference solution of the energy equation. The temperature predictions using the new scheme are in good agreement with the experimental data. A significant reduction in the numerical diffusion errors was achieved.
author list (cited authors)
Hassan, Y. A., Rice, J. G., & Kim, J. H.