Study on Load-following Operation Mode of Small Sodium-Cooled Fast Reactor Nuclear Power System

Based on the platform of RELAP/GSE combined with MATLAB/Simulink, a simulation model is established for the scheme of coupling Stirling thermoelectric conversion module in small sodium-cooled fast reactors, so as to study the load following operation capability and operation mode of the nuclear power supply system of a small sodium-cooled fast reactor. In the extreme case of load step and no control system intervention, the load-following capability of each loop system of nuclear power supply is tested in a hierarchical manner, and a control scheme suitable for load-following mode is proposed and verified. The simulation results show that the power supply system has the ability to withstand ±10% load step changes and has strong load-following capability to cooperate with grid peak shaving. At the same time, this research proposes two coordinated control schemes for the load-following operation mode of the power supply system, and provides a coordinated control scheme suitable for the load-following operation mode of the small sodium reactor power supply through simulation analysis and comparison.