Two-phase flow mechanism model and dynamic simulation of steam generator in nuclear power plant

Steam generator has been one of the key equipment in the primary circuit of nuclear power plant. Its safety and economic operation is very vital for nuclear power plant. According to the homogeneous assumption, a vertical U-tube natural circulation two-phase flow steam generator mechanism model was set up with main heat and mass transfer equations depend on modular modeling method in this paper. The simulation results show that, the steady-state parameters errors are small and the dynamic parameters trends are in line with the theoretical analysis, which verifies the rationality of the mechanism model built in this paper.