| 摘要 |
PURPOSE:To improve the control performance of feed water flow rate by separately providing a proportional computing element which makes the proportional action of a reactor water level detection signal and integrator which integrates the water level deviation signal between the reactor water level detection signal and a rector water level set signal. CONSTITUTION:The level of the water in a reactor is detected by a reactor water level detector 23 and is applied as the reactor water level detection signal S23 to a water level comparator 22 of a feed water flow rate controller 20. The comparator 22 compares the signal S23 with the reactor water level set signal S21 from a reactor water level setter 21 and outputs the deviation between the two signals as the water level deviation signal S22. This signal S22 is integrated by an integrator 24 and is applied as the water level deviation signal S24 to the computering element 25. The element 25 adequately adds and subtracts the reactor water level detection signal 26 applied with a required proportional gain by a proportional computing element 26 and a mismatch water level signal S28 to and from the signal S24 and applies the result of the computation as a feed water flow command signal S11 to a feed water pump 9. The control performance of the feed water flow rate of the controller 20 is thereby improved.
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