Simulation of Pressure Drop for Different Venturi Diameters

This study calculates the pressure distribution by computational fluid dynamics (CFD) for various reactor core groups and maintains the pressure drop between venturi inlet and venturi throat within 5% errors. The commercial software Star-CCM+ was used to calculate the pressure distributions. CFD simulation techniques are used to calculate pressure distributions for various groups. Thus, this study finally succeeds to match the pressure drop within the given ranges. Korea Atomic Energy Research Institute (KAERI) is developing Sodium-cooled Fast Reactor (SFR) and trying to obtain the approval about SFR design. As the type of SFR is different from the other reactors, it is expected that the hydraulics characteristics such as, pressure drop and velocity distributions should be different. Additionally, it is essential to maintain the pressure drop for various reactor core groups (1-9) which have different flow rates. Normally, the orifice and venturi can be used to control the pressure drop in the hydraulics system and the diameter of venturi is very sensitive for the pressure drop. Therefore, it is required to maintain the pressure drop between venturi inlet and venturi throat firstly