REACTOR WATER LEVEL MEASUREMENT SYSTEM

摘要

Provided is a reactor water level measurement system capable of water level measurement throughout a reactor pressure vessel. A reactor water level measurement system is provided with: a condensation tank (11) which is connected to a steam region of a pressure vessel (2); a reference pipe (21) which has one end connected to the condensation tank (11); variable pipes (22-24) which each have one end connected to the pressure vessel (2); differential pressure type water gauges (31-34) which are connected to the other ends of the reference pipe (21) and the variable pipes (22-24) and detect the water head differences of the reference pipe (21) and the variable pipes (22-24); non-differential pressure type water gauges (35, 36) which detect the water level of the pressure vessel (2); and an arithmetic device (20) which, on the basis of the state of a containment vessel (4) or the pressure vessel (2), selects a differential pressure type water gauge (31-34) or a non-differential pressure type water gauge (35, 36), and indicates and records the water level of the pressure vessel (2) on the basis of the result of detection by the selected water gauge.