Simulation of Dynamic Mathematical Modeling for PWR Nuclear Power Plant Core Based on PSASP

Neutron dynamic model and fuel/coolant thermal output dynamic model were implemented in PSASP through a user-defined program. Based on the mathematical models of different orders, the dynamic behaviors of the NPP core under the input of step disturbance of reactivity and cool-line temperature were simulated in PSASP respectively. The simulation results demonstrate the self-stability of NPP core with temperature effect and poisoning effect, which is consistent with the real-world data.Moreover, the simulation validated the proposed core model, and it can be further used in dynamic calculation of the power system.