Method and system for reducing measurement uncertainty of main feed water flow of nuclear power plant

By installing orthogonally arranged ultrasonic flowmeter probes in the water supply pipeline of the nuclear power plant and using data acquisition and processing methods, the uncertainty of flow measurement is reduced, the problem of uncertainty of water supply flow measurement of the main water supply pipeline of the nuclear power plant is solved, and the safety and economy of the nuclear power plant is improved.

CN120489267APending Publication Date: 2025-08-15GUANGXI FANGCHENGGANG NUCLEAR POWER
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Patent Information

Application Number
CN202510523842.3
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-04-24
Publication Date
2025-08-15

AI Technical Summary

Technical Problem

There is high uncertainty in the measurement of the water supply flow of the nuclear power plant, which cannot meet the requirements of high reliability, affecting the safe operation of the nuclear power plant.

Method used

By installing multiple ultrasonic flowmeter probes in the main water supply pipeline and adopting orthogonal arrangements, combining data acquisition, preprocessing, mean processing and different flow calculation methods, the uncertainty of flow measurement is reduced.

Benefits of technology

It effectively reduces the uncertainty of the measurement of main water supply flow, increases the reactor power of nuclear power plants, improves economy, and avoids transient disturbances caused by lifting and lowering power, ensuring the safe and stable operation of nuclear power plants.

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Abstract

The invention relates to a method and system for reducing uncertainty of measurement of main feed water flow of a nuclear power plant, and the method comprises the steps: collecting data of a plurality of measurement points in a main feed water pipeline according to a preset collection method, and obtaining the collection data of each measurement point; preprocessing the data to obtain preprocessed data of each measurement point; carrying out mean value processing on the preprocessed data to obtain a flow velocity representative value of each measurement point; performing calculation based on the flow velocity representative value of each measurement point to obtain a plurality of reference data; determining a flow calculation mode of the main water supply pipeline of the nuclear power plant according to the reference data; and calculating the flow in the main water supply pipeline of the nuclear power plant according to the flow calculation mode. The flow of the main water supply pipeline is calculated in different modes according to the change condition of the flow velocity, the uncertainty of the ultrasonic flowmeter is effectively reduced, the reactor power of a nuclear power plant is improved, and the economical efficiency is improved. Meanwhile, transient disturbance caused by power increasing and decreasing can be avoided, and safe and stable operation of the nuclear power plant is guaranteed.
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