Module-Coordination of a Two-Modular High Temperature Gas-Cooled Nuclear Plant

Nuclear fission power plays an important role in generating electricity. Due to its inherent safety feature, modular high temperature gas-cooled reactor has been seen as one of the best candidates of building the next generation of nuclear plant. The inherent safety feature can be extended to the whole plant through the multi-modular operating scheme. Therefore, the coordinated control of the nuclear steam supplying system (NSSS) modules is crucial for the operation of multi-modular nuclear plant. In this paper, the module coordination of the two-modular high temperature gas cooled nuclear plant HTR-PM is studied. Then, the module coordination is realized through the flowrate-pressure control of the secondary common steam/water fluid flow network (FFN), and a flowrate-pressure regulator is proposed. The control law takes the simple proportional-integral (PI) form and provides satisfactory closed-loop stability. Simulation results show the feasibility and satisfactory transient performance of this modular coordinated control.