Reactor Power Control Apparatus of Natural Circulation Reactor, And Method For Controlling Reactor Power of Natural Circulation Reactor

Abstract

In the present invention, a reactor power control apparatus of a natural circulation reactor comprises a reactor pressure vessel which circulates cooling water using the density difference of the coolant inside, a feed water pipe which is connected to the reactor pressure vessel and supplies cooling water, a power control section which controls the reactor power using a control rod. The feed water pipe has an ultrasonic thermometer sensor. Driving of the control rod is controlled by the power control section based on the feed water temperature detected by the feed water thermometer. The reactor power control apparatus can detect the temperature of the feed water and perform drive control of the control rod preferentially, and obtain stable reactor power.

1 - 8 . (canceled) 
   
   
       9 . A reactor power control apparatus of the natural circulation reactor comprising:
 a reactor pressure vessel for generating steam by natural circulation of cooling water internally;   a feed water pipe for supplying the cooling water to said reactor pressure vessel;   a heating apparatus for heating the cooling water with the steam generated in said reactor pressure vessel;   a control valve for adjusting the amount of steam being supplied to said heating apparatus;   a power controller section for controlling the reactor power using a control rod; and   a feed water temperature detection apparatus provide to said feed water pipe, and   wherein said power control section controls driving of the control rod based on the feed water temperature detected by said feed water temperature detection apparatus.   
   
   
       10 . The reactor power control apparatus of the natural circulation reactor according to  claim 9 , comprising a plurality of said control valves. 
   
   
       11 . The reactor power control apparatus of the natural circulation reactor according to  claim 9 , wherein said feed water temperature detection section has a plurality of pair of ultrasonic sensor. 
   
   
       12 . A method for controlling the reactor power of a natural circulation reactor providing with a reactor pressure vessel for generating steam by natural circulation of cooling water internally; a feed water pipe for supplying the cooling water to said reactor pressure vessel; and a power control a power controller section for controlling the reactor power using a control rod, comprising steps of:
 detecting temperature of the cooling water passing through said feed water pipe by a feed water temperature detection apparatus provided to said feed water pipe; and   controlling driving of a control rod based on said detected temperature by said power control section.