FULL RANGE FEEDWATER CONTROL SYSTEM AND METHOD FOR PRESSURIZED WATER REACTOR STEAM GENERATORS

摘要

Pressurized water reactors (pressurized water reactor) the water supply control system, and method of the steam generator, the output from the water supply control system signal (output signal) for receiving at least one feed pump, output for using the water supply control system for a steam generating system, economizer (economizer) for receiving a signal and automatically control the water flow of the steam generator when it is in between the predetermined range, preferably from about 10 to 100% of the first power level (power level) of the water supply control system feed water control valve, and receives the output signal and the output level is within a predetermined range of the second, preferably from 0 to precipitation to automatically control the water flow of the steam generator when it is in between about 10% of tube (downcomer) water and a control valve. With a third input signal, which is determined by the level of the second input signal, and a steam generator, which is determined by the steam flow of the steam generator, the input signals from the first, which is determined by the water flow of the steam generator is provided. The first, second, and third input signals are in the range of the first advance when the determined output level range are combined to determine an output signal, a third input signal, the output level that is determined by itself in the second advance of It determines an output signal when. Switch is automatically switched to a predetermined output level, that is, to determine the output signal when the output of about 10%, the combination of claim 1. The second and third input signals directly from the third input signal.