Multi-Physics simulation for Nuclear Reactor core by CUPID and DeCART coupling

KAERI has been developing a component-scale thermal hydraulics code, CUPID and neutron kinetics code, DeCART. For a multi-scale analysis, the CUPID is on course to merge into a system-scale thermal hydraulic code, MARS. In the present paper, a multi-physics simulation was performed by coupling CUPID with a three dimensional pin-wise neutron kinetics code, DeCART. Supervisory server program organize two codes with socket communication with TCP/IP. OPR1000 nuclear reactor core was simulated. The following sections present the numerical modeling for the reactor core, coupling of the kinetics code, and the simulation results. Co-simulation was controlled by supervisory program which calls two codes with MPI communication. For thermal-hydraulics analysis, porous media approach was adopted and corresponding pressure drop models such as friction and turbulent mixing were considered. Steady state of normal operation for OPR1000 reactor was taken into account.