Three dimensional numerical simulation of sodium flow on small water leak in steam generator of fast reactor

In order to calculate the sodium-water reaction products transport and diffusion in occurrence of small water leak in steam generator, a three dimensional numerical model of sodium steady flow in steam generator of fast reactors is established. The numerical model uses the distributed resistance along with volumetric porosity and surface permeability to model the effect of tubes on sodium flow in the steam generator. The distributed resistance of banks of tubes is correlated by the pressure drop formula of the flow perpendicular to tubes and the flow parallel to the tubes. Turbulence effects are modeled using a κ-ε model. Shell and support plate walls are modeled using the wall function approach. Good agreement is obtained between the computed results and experiments