Recompression supercritical carbon dioxide (SCO2) Brayton Cycle for the Chinese Initiative Accelerator Driven System (CiADS)\nis taken into account, and flexible thermodynamic modeling method is presented. The influences of the key parameters on\nthermodynamic properties of SCO2 Brayton Cycle are discussed and the comparative analyses on genetic algorithm and pattern\nsearch algorithm are conducted. It is shown that the cycle parameters such as turbine inlet temperature, pressure ratio, outlet\ntemperature at the hot end of condenser, and terminal temperature difference of regenerator 1 and regenerator 2 have significant\neffects on the cycle thermal efficiency. The calculation results indicate that pattern search algorithm has better optimization\nperformance and quicker calculating speed than genetic algorithm. The result of optimization of the parameters for CiADS with\nsupercritical carbon dioxide Brayton Cycle is 35.97%. Compared with other nuclear power plants of SCO2 Brayton Cycle, CiADS\nwith SCO2 Brayton Cycle does not have the best thermal efficiency, but the thermal efficiency can be improved with the reactor\noutlet temperature increases.
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