Method for measuring steam-water mismatching amount of steam generator

Abstract

The invention discloses a method for measuring the steam-water mismatching amount of a steam generator for a nuclear power station, which comprises the following steps of: (1) measuring water supply temperature TFW and water supply flow mFWM of water entering the steam generator to obtain actual flow mFW; (2) determining thermal power PW required by converting the water into steam; (3) determining thermal power PS generated by a loop of a reactor; and (4) determining steam-water mismatching amount (PW-PS). In the method, the actual water supply flow of the steam generator is corrected, and the steam-water mismatching amount of the flow is changed into the thermal power mismatching amount, so that the problem of inaccurate flow measurement caused by the change of temperature and pressure of the steam is solved fundamentally, the measurement error is reduced, and the safety and reliability of the nuclear power station are improved. The actual operation of the integral measuring method only needs the accurate measurement of the water supply flow mFWM and the water supply temperature TFW, and thus the method has the advantages of few required measurement parameters, convenient operation and high accuracy and feasibility.

Description

technical field [0001] The invention relates to a steam-water flow measurement method, in particular to a measurement method for steam-water mismatch of a steam generator used in a nuclear power plant. Background technique [0002] The steam-water mismatch of steam generators in nuclear power plants is a very important parameter for the safety control of nuclear power plants. At present, the commonly used measurement methods for the steam-water mismatch of steam generators in nuclear power plants are: first, measure the actual water supply of steam generators. Then, measure the steam generator steam flow. Finally, subtract the latter from the former to obtain the soda mismatch. Because the pressure in the steam generator changes from time to time, the measured steam flow rate of the steam generator has a large deviation, resulting in a large deviation in the final mismatch of steam and water, thus triggering the action of the equipment by mistake. Contents of the inventio...

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Problems solved by technology

Because the pressure in the steam generator changes from time to time, the measured steam flow rate of the steam generator has a large deviation, which makes the final mismatch of steam and water have a large deviation, thus triggering the action of the equipment by mistake

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