Nuclear power station pressure pipeline leakage acoustic emission monitoring method and monitoring system thereof

A monitoring system and pressure pipeline technology, applied in pipeline systems, mechanical equipment, gas/liquid distribution and storage, etc., can solve the problems of lack of effective estimation of leakage rate, inability to quantitative analysis of leakage, identification and location of pressure pipeline leakage, etc. Achieve the effect of improving real-time performance and sensitivity, improving anti-false alarm capability, and improving reliability

Inactive Publication Date: 2012-09-19
NUCLEAR POWER INSTITUTE OF CHINA
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the current acoustic emission monitoring method for pressure boundary leakage can only realize the identification and location...

Method used

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  • Nuclear power station pressure pipeline leakage acoustic emission monitoring method and monitoring system thereof
  • Nuclear power station pressure pipeline leakage acoustic emission monitoring method and monitoring system thereof
  • Nuclear power station pressure pipeline leakage acoustic emission monitoring method and monitoring system thereof

Examples

Experimental program
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Embodiment

[0123] Using the method and system of the present invention, using the power equipment comprehensive test device as a test platform, respectively connect the processed microporous test piece and the leakage test section of the pressure pipeline through the crack to the test interface of the power equipment comprehensive test device, and the pressure on the nuclear power plant Pipelines are subjected to thermoacoustic effect test of insulation layer, micropore leakage test and acoustic emission test of pipeline through crack leakage:

[0124] Four 0Cr18Ni10Ti high-pressure pipes with an outer diameter of Φ152mm, a wall thickness of 12mm, and a length of 7700mm (consisting of a 500mm-long crack test piece and a 3600mm long pipe section welded front and back) were used as test pieces, and processed by EDM. Etch an axial V-shaped groove on the inner surface, use the pressure pipeline crack opening area calculation model and the crack leakage calculation model to calculate the pe...

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PUM

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Abstract

The invention relates to a nuclear power station pressure pipeline leakage acoustic emission monitoring method and a monitoring system thereof. The monitoring method comprises the following steps that: a pressure pipeline leakage test piece is prepared; the defects of initiation, cracks, expansion and even through leakage of a nuclear power station pipeline are simulated; a leakage acoustic emission calibration test is taken; and the pipeline through crack leakage of the high-temperature and high-pressure environment of a nuclear power station is simulated. The monitoring system adopts a standardized and modularized design based on a PCI extensions for instrumentation (PXI) bus, so that the system overhaul and the part replacement are convenient. According to the invention, the data recording of leakage events and the database management of monitoring results can be carried out, and the leakage positions and the dynamic changes of the leakage rate thereof can be comprehensively reflected.

Description

technical field [0001] The invention relates to a monitoring method and a monitoring system for a nuclear power plant pressure pipeline, in particular to a nuclear power plant pressure pipeline leakage acoustic emission monitoring method and a monitoring system. Background technique [0002] There are a large number of welded structures in the pressure vessels and pipelines of nuclear power plants, and there will be welding defects in many welds. Alternating loads, as well as the influence of the environment (such as radiation) and media (such as corrosion), will cause the original defects in pressure vessels and pipelines to crack, expand, and sometimes new defects will be initiated. [0003] Defective pressure vessels and pipelines cause crack initiation and expansion during production, and eventually lead to failure of pressure vessels and pipelines; the failure forms include leakage and blasting. [0004] In order to avoid the occurrence of blasting, the evaluation crit...

Claims

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Application Information

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IPC IPC(8): F17D5/06
Inventor 刘才学何攀宋健
Owner NUCLEAR POWER INSTITUTE OF CHINA
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