In order to realize the constant pressure and constant flow start-stop mode for its once-through steam generator(OTSG)

the steam-water separator system was studied and designed based on the engineering experience at home and abroad in this paper.The design proposed in this paper has met the requirements of steam-water separation

working substance recovery and inlet-outlet parameter control during the start-stop process.Moreover

by setting steam-water separator bypass system coordinated with steam-water separator backup system

this paper also solved the problem of short operation life in the creep temperature zone and strict limitation on allowable values for the device temperature difference and device temperature change rate

for the steam-water separator during high temperature and high pressure.The research in this paper has already been applied to the engineering design of the high temperature reactor-pebbled modules(HTR-PM)steam-water separator system.