| 摘要 |
PURPOSE:To obtain a water level measuring apparatus for a nuclear reactor which achieves an accurate measurement of the water level of the nuclear reactor with one measuring system utilizing an ultrasonic wave without requiring an instrument piping. CONSTITUTION:In a water level measuring apparatus for a nuclear reactor, an ultrasonic waveguide 22 having a side hole is erected in a pressure vessel 10 and an ultrasonic transducer 21 is mounted aligning the center axis of the ultrasonic waveguide 22 to form an ultrasonic propagation system 20. On the other hand, an ultrasonic transmitting/receiving means 25 is connected to an ultrasonic transducer 21 and an ultrasonic transmission controller 28 is connected thereto 25. An ultrasonic signal processor 30 is connected to both of the ultrasonic transmission controller 28 and the ultrasonic transmitting/receiving means 25 and a reactor water level display device 32 is provided to display a water level of the reactor as processed and calculated with the ultrasonic signal processor. |
