Evaluation of compressible flow in spherical fueled reactors using the porous media model

► Using porous media model, the compressible coolant flow in PBMR is explored. ► The BCC arrangement of fuel particles is considered and using ANSYS CFX, CFD simulation of core is carried out. ► Formula of pressure drop presented by Kugeler and Schulten is modified. ► Coolant density is considered as a function of the cores length in ANSYS CFX. ► Helium compressibility role in core cooling system has been demonstrated.