Application of MCS/CTF/FRAPCON Multi-physics Coupling Code System in BEAVRS Cycle 1 Depletion Simulation

UNIST developed Monte Carlo code – MCS has been fully coupled with sub-channel thermal/hydraulic code – CTF, together with fuel performance prediction code – FRAPCON recently to implement the neutronic, thermal-hydraulic, and fuel performance simulation capability during Monte Carlo neutron transport based depletion analysis. The BEAVRS Benchmark cycle 1 depletion with multi-physics coupling feedback has been performed by the fully coupled MCS/CTF/FRAPCON code system. Firstly, the CBC letdown with 100% power level was compared with the measured values shown in Table 24 and Table 25 of the manual, which shows a very good agreement between MCS results and measurement. Besides, the axially integrated power distribution at EOC calculated from the real power level, control rod position, inlet coolant temperature was compared with measured data, which also shows the good accuracy of this coupling code system.