Dynamic simulation of core power control for SPWR based on dynamic model bank

Abstract

Small pressurized water reactor (SPWR) is characterized by small size and compact structure, which not only has high safety, but also has good economic benefits. To address the problem of SPWR core power control under conditions of large rapid changes and to better represent the reactor core dynamic characteristics, the reactor core dynamic model bank is established by combining the fixed model bank and the adaptive model. Based on the core dynamic model bank, the core power control system of SPWR is constructed with the combination of the PID controller. With the reactivity disturbance and the core coolant inlet temperature disturbance introduced, the dynamic simulation of the core power control system is performed and the response is compared with the response of the nonlinear model of reactor core. The results show that the core dynamic model bank is applicable to the core power regulation of SPWR.