Water level measuring method for reactor pressure vessel

The invention discloses a water level measuring method for a reactor pressure vessel, and relates to the field of nuclear power plant detection, and the method comprises the following steps: S1, arranging pressure transmitters at pressure taps at the top and the bottom of the pressure vessel, respectively measuring the top pressure and the bottom pressure of the pressure vessel, and obtaining the full water level height H0 of the pressure vessel; s2, judging the current operation condition of the reactor according to the operation and shutdown number of the reactor and the pressure difference between the top pressure of the pressure vessel and a set value; and S3, according to different operation conditions of the reactor, respectively calculating the water levels of the pressure vessels under respective operation conditions. By adopting the scheme, the operation condition is judged through the pressure transmitter with the remote transmission device at the upper part of the pressure vessel, differential pres