Numerical analysis of heat transfer and flow with three-dimensional steady and transient states in sodium pool of fast breeder reactor

Three-dimensional computer code FASTOR-3D, based on SIMPLEC algorithm and staggered grid scheme, is used to simulate heat transfer and flows in sodium pool of fast breeder reactor. Porosity model is used to simulate the effects of obstacles in the fluid domain. On the basis of computation and analysis for flow line and temperature distributions of steady state three kinds of transient situations, temperature fluctuating, pump stopping and shut down are computed. The data of flowline and temperature are analyzed. It is found that FASTOR-3D has good stability and the porosity model is reasonable by accordance between numerical results and geometrical conditions. Numerical results of two accident situations, pump stopping and shut down, conform to the basic features of low velocity