CFX Simulation of a CS28-2 Experiment

A computational fluid dynamics (CFD) simulation tool for the CS28-2 high temperature experiment is developed with a CFX-10 software and the results obtained from the simulations are compared with the experimental data. The CS28-2 test is one of the experiments to understand the high-temperature fuel channel behavior and to establish the effectiveness of the moderator as a heat sink to demonstrate the safety of CANDU reactors. The main heat transfer characteristics of the CS28-2 are a super-heated steam convection and a radiation heat transfer from the hot rods to the surrounding cold wall. The CFX-10 predictions of the temperatures of the heater rods and the pressure tube are in good agreement with the measurement data for steady-state conditions.