METHOD OF CONTROLLING FEED WATER TEMPERATURE OF FAST BREEDER REACTOR

摘要

PURPOSE:To hold feed water temperature at prescribed temperature and allow attemperation of thermal shock of a steam generator feed water nozzle part by selecting low value of a control signal based on the control signal and feed water temperature information according to mean difference pressure information of a feed water flow regulating valve and controlling feed water temperature at the time of load loss. CONSTITUTION:In the case where turbine load loss or a turbine governor opening low signal is generated, a main control signal made according to the mean pressure difference information of a feed water flow regulating valve is compared with another main control signal made according to steam generator feed water temperature information and feed water temperature is controlled by the control signal selecting lower output value between them. In other words, the discharge of a feed water pump can be controlled so as to be prescribed feed water temperature by regulating a turbine extracted steam governor and controlling a drive turbine 27 by a control circuit 27 from selected control signals. Therefore, since steam generator feed water temperature is maintained at prescribed temperature, thermal shock of a steam generator feed water nozzle part can be attempered.