Fig. 1. Schematic of a new nuclear power system

Fig. 2. Core of the new type of heat pipe reactor

Fig. 3. Calculation flowchart of coupling code

Fig. 4. System node diagram

Fig. 5. Response to +0.001 reactivity introduction (a) Power and speed response, (b) Temperature response, (c) Reactivity response, (d) Pressure and flowrate response

Fig. 6. Calculation results of load disturbance (a) Power response under -5% load disturbance, (b) Power response under +5% load disturbance, (c) Flowrate response, (d) Temperature response under -5% load disturbance, (e) Temperature response under +5% load disturbance

Fig. 7. Response to cooling water temperature disturbance (a) Temperature disturbance, (b) Temperature response 2, (c) Reactor core power response and reactivity response, (d) Flowrate response, (e) Pressure response

Fig. 8. Response to cooling water flow disturbance (a) Compressor inlet temperature response, (b) Speed response, (c) Flowrate response, (d) Turbine inlet temperature response, (e) Reactor core temperature response, (f) Reactor core power response, (g) Compressor outlet temperature response

Fig. 9. Schematic diagram of control system

Fig. 10. Flow chart of compressor inlet temperature control

Fig. 11. Flow chart of rotary speed and load control

Fig. 12. Performance curve of compressor

Fig. 13. Comparison of compressor flow control (a) Uncontrolled compressor flowrate, 70% load, (b) Controlled compressor flowrate, 0% load

Fig. 14. Flow chart of compressor flow control

Fig. 15. Flow chart of turbine inlet temperature and core power control

Fig. 16. Results of linear load variation (a) Load and power variations, (b) Flowrate variation, (c) Pressure variation, (d) Temperature and rotary speed variations

Fig. 17. Results of stepped load variation (a) Load and power variations, (b) Flowrate variation, (c) Pressure variation, (d) Temperature and rotary speed variations

Fig. 18. Calculation results of load rejection at different degrees (a) Reactor core power variation, (b) Reactor core temperature variation, (c) Turbine inlet temperature variation, (d) Turbine inlet pressure variation

Fig. 19. Calculation results of 70% load rejection (a) Flowrate variation, (b) Temperature variation, (c) Heat transfer coefficient and rotary speed variations, (d) Reactivity variation, (e) Power variation, (f) Pressure variation