BODYFIT-2PE-HEM: LWR Core Thermal-Hydraulic Code Using Boundary-Fitted Coordinates and Two-Phase Homogeneous Equilibrium Model. Volume 3: Validation and Applications

摘要

The BODYFIT-2PE-HEM code was used to simulate several Pressurized Water Reactor (PWR) and Boiling Water Reactor (BWR) types of experiments to validate its applicability and accuracy. Five simulations are reported in this volume. The first comparison was between the closed form analytical solution and the BODYFIT calculation of 3-D flows in an inifinite square array of circular tubes. Both the velocity profiles along symmetry lines and Nusselt numbers as a function of the entrance distance were given in the report. The second simulation was on the Columbia University 4 x 4 rod bundle experiment with a power skew of 2 to 1. The calculated mass flow rates and qualities for both hot and cold subchannels at the exit of the rod bundle were compared with the experimental isokinetic measurements. The third simulation was on the Babcock and Wilcox 4 x 6 rod bundle experiments with a power skew of 1.5 to 1. Again, the calculated mass flow rates and qualities for both hot and cold subchannels at the exit of the rod bundle were compared with the experimental isokinetic measurements. The fourth simulation was on the Westinghouse 4 x 5 rod bundle critical heat flux experiments and transient pressure drop tests. In this simulation, the critical heat fluxes calculated by the code with several CHF correlations were compared with the experimental measurements. Furthermore, the pressure drops, as a function of time, were compared with the experimental values for the flow rundown transients. The fifth simulation was on the GE 3 x 3 CHF experiments. Many operating conditions with different inlet temperatures, inlet velocities, and system pressures were used in the experiments. Code calculations were based on the Biasi correlation and the Columbia University correlation. Comparisons between calcuations and measurements show good agreements, demonstrating the validity and accuracy of the BODYFIT-2PE-HEM code. 14 refs., 36 figs., 11 tabs. (ERA citation 10:048592)