FEED WATER TEMPERATURE CONTROL METHOD FOR PLANT, POWER GENERATION PLANT, AND FEED WATER TEMPERATURE CONTROL DEVICE

摘要

PPROBLEM TO BE SOLVED: To provide a feed water temperature control method for a nuclear power plant, capable of improving instability of feed water temperature control. PSOLUTION: A low-pressure feed water heater 11, a high-pressure feed water heater 12 and an electric heater 13 are set in a water supply pipe 10 connected to an RPV 2. The water supply pipe 10 includes a thermometer 30 set between the high-pressure feed water heater 12 and the electric heater 13 and a thermometer 38 set between the electric heater 13 and the RPV 2. A feed water temperature controller 29 controls the opening of a bleed valve 15 for adjusting the flow rate of extracted steam supplied to the high-pressure feed water heater 12 and the current supplied to the electric heater 13, and further controls the temperature of feed water supplied to the RPV 2. For this feed water temperature control, temperature TSBA/SBof the feed water discharged from the heater 12, which is measured by the thermometer 30 and temperature TSBB/SBof the feed water after heated by the electric heater 13, which is measured by the thermometer 38, are also used. The instability of feed water temperature control can be improved by using the electric heater 13. PCOPYRIGHT: (C)2010,JPO&INPIT