Loose part diagnosis method for nuclear power station

A component diagnosis, nuclear power plant technology, applied to computer components, instruments, character and pattern recognition, etc.

Active Publication Date: 2011-08-17
NUCLEAR POWER INSTITUTE OF CHINA
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  • Abstract
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Problems solved by technology

At present, domestic nuclear power plant loose parts diagnosis technology still relies on foreign companies. For example, China General Nuclear Power Group pays an annual fee to France every year. When the loose parts monitoring system sends out an alarm signal, it collects and records relevant data and sends them to France for analysis. The disadvantages are It is often impossible to capture event signals, the cycle of analysis results is long, and there is no strong expert technical support

Method used

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  • Loose part diagnosis method for nuclear power station
  • Loose part diagnosis method for nuclear power station
  • Loose part diagnosis method for nuclear power station

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Embodiment Construction

[0055] First select one or more event records, analyze the noise trend of the original sampling signal data corresponding to the event, and then perform event signal analysis on the original sampling signal data corresponding to the event. In the event analysis, use the signal time history waveform to find the maximum value The acceleration peak value is calculated by the method, the RMS value is calculated by using the RMS algorithm to calculate the RMS value by taking the data block in the original data duration period, and the time history analysis, cross-correlation or envelope analysis method is selected to calculate the burst wave start time, and the time history analysis or The envelope analysis method is used to calculate the rising edge time of the burst wave, select the time history analysis or envelope analysis method to calculate the burst wave duration, and use the FFT waveform to find the maximum value to calculate the peak frequency; then confirm the acceleration ...

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Abstract

The invention relates to a loose part diagnosis method for a nuclear power station, which comprises the steps as follows: (1) event database building; (2) event signal analysis; and (3) positioning and quantitative calculation. The loose part diagnosis method for the nuclear power station is used for fault monitoring and diagnosis for the nuclear power station, timely analyzes the loose part alarm events after a loose part monitoring system gives off the alarm fault signal, confirms the features of the loose part and estimates the positioning quality of the loose part. The positioning error of the loose part events is 0.5m, the quality estimation error of the loose part is plus-minus 50% and the energy estimation error is plus-minus 50%.

Description

technical field [0001] The invention relates to a method for diagnosing loose parts of a nuclear power plant, in particular to a method for diagnosing an alarm event issued by a monitoring system for loose parts of a nuclear power plant. Background technique [0002] After the nuclear power plant loose part (LP) monitoring system detects an alarm event, it is necessary to diagnose and analyze the alarm event in a timely manner to confirm the nature of the alarm event (loose part, falling part, vibration or interference). Carry out positioning, estimate the mass of loose parts and their collision energy, evaluate the pressure boundary in the impact flow channel and the hazards of key parts, and provide a basis for taking shutdown maintenance measures. At present, domestic nuclear power plant loose parts diagnosis technology still relies on foreign companies. For example, China General Nuclear Power Group pays an annual fee to France every year. When the loose parts monitorin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01M7/00G06K9/00
Inventor 刘才学胡建荣简捷盘世标
Owner NUCLEAR POWER INSTITUTE OF CHINA
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