Development of advanced neutronics/thermal-hydraulics coupling simulation system, 8; Numerical simulations of two-phase flow including phase change using temperature recovering method

Kamiya, Tomohiro ; Ono, Ayako ; Tada, Kenichi   ; Yamashita, Susumu   ; Nagaya, Yasunobu  ; Yoshida, Hiroyuki  

JAEA is developing a platform JAMPAN for multi-physics simulations to improve the design and safety of light water reactors. The Monte Carlo code MVP and the direct numerical simulation code for multi-phase flow JUPITER were coupled on this platform for detailed and high-fidelity neutronics/thermal-hydraulics coupling simulations. Because bubbles generated by boiling in a BWR have a large influence on neutron transport, phase change must be considered for the simulations. We will show simulation results of two-phase flow including phase change in this presentation. In these simulations, a temperature recovering method was used to estimate the amount of evaporation and condensation. We used an interface capture method as two-phase flow analysis method.