A reactor pressure vessel level measurement correction method, device and measurement system

By using a combination of a balance tank, temperature and pressure measuring elements, and differential pressure measuring elements in the reactor pressure vessel, combined with a correction algorithm, the problem of insufficient liquid level measurement accuracy is solved, and real-time online correction and accurate measurement of the coolant level are achieved, ensuring the safe operation of the reactor.

CN119309653BActive Publication Date: 2025-10-17CHINA NUCLEAR POWER ENGINEERING COMPANY LTD +1
2 Cites 0 Cited by

Patent Information

Application Number
CN202411452987.0
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2024-10-17
Publication Date
2025-10-17
Estimated Expiration
2044-10-17

AI Technical Summary

Technical Problem

When measuring pressure vessels with both vapor and liquid phases, existing liquid level measurement methods suffer from insufficient measurement accuracy due to changes in coolant temperature and pressure. This is especially true during reactor operation, where changes in reactor power affect the coolant level measurement accuracy.

Method used

A combination of a balancing tank, temperature measuring elements, pressure measuring elements and differential pressure measuring elements is used to obtain temperature, pressure and height data of multiple measuring intervals of the pressure vessel. The liquid level height is corrected online in real time using a correction algorithm, and the corrected liquid level is calculated by combining the principles of fluid statics with temperature and pressure data.

Benefits of technology

The accuracy and reliability of coolant level measurement in the reactor pressure vessel are improved, real-time detection and correction of the liquid level height are achieved, and the safe operation of the reactor is supported.

✦ Generated by Eureka AI based on patent content.
Patent Text Reader

Abstract

The present application relates to reactor pressure vessel liquid level measurement correction method, comprising the following steps: the pressure vessel is divided into a plurality of measurement intervals along the pressure difference direction;Obtain the first measurement data of the pressure vessel, calculate the initial measurement liquid level height of the pressure vessel according to the first measurement data, and assign the to-be-corrected liquid level height as a variable and judge the measurement interval and correct;According to the measurement interval of the corrected liquid level height and the to-be-corrected liquid level height before correction, the measurement interval of the two is compared, when the two belong to different measurement intervals, the to-be-corrected liquid level height is replaced by the current corrected liquid level height, and the latest to-be-corrected liquid level height is corrected;Until the latest corrected liquid level height and the latest to-be-corrected liquid level height are in the same measurement interval, the latest corrected liquid level height is taken as the liquid level height of the coolant in the pressure vessel;The present application can realize the online correction of the coolant liquid level in the pressure vessel, and improve the liquid level representation accuracy.
Need to check novelty before this filing date? Find Prior Art