Conventional island pipe wall thinning detecting device and method for nuclear power plant

A detection device and detection method technology, applied in the direction of measuring devices, electrical devices, measuring heat, etc., can solve the problems of high cost and heavy workload, and achieve the effect of saving human resources and avoiding common industrial risks

Active Publication Date: 2019-04-19
CHINA NUCLEAR POWER TECH RES INST CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] 1. Heavy workload: For a certain pipe fitting, the UT inspection needs to dismantle the on-site insulation and build scaffolding. After the inspection is completed, the original insulation will be reinstalled; every overhaul, the nuclear power plant ...

Method used

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  • Conventional island pipe wall thinning detecting device and method for nuclear power plant
  • Conventional island pipe wall thinning detecting device and method for nuclear power plant
  • Conventional island pipe wall thinning detecting device and method for nuclear power plant

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Embodiment 1

[0077] Corresponding to Embodiment 1 of the present invention, Embodiment 2 of the present invention provides a method for detecting tube wall thinning of conventional islands in nuclear power plants, including:

[0078] Step S1, using a temperature measuring probe arranged at the outer wall of the pipe to be tested to measure the temperature of the outer wall of the pipe to be tested;

[0079] Step S2, through the portable mobile terminal plugged into the intermediate storage device, the temperature of the outer wall surface of the pipe to be tested is received from the intermediate storage device, and the wall thickness of the pipe to be tested is obtained based on the heat conduction inverse problem.

[0080] Wherein, the step S2 further includes:

[0081] Step S21, setting the initial assignment for solving the heat conduction direct problem;

[0082] Step S22, solving the heat conduction direct problem according to the heat conduction differential equation, and obtaining...

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Abstract

The invention provides a conventional island pipe wall thinning detecting device and method for a nuclear power plant. The device includes a temperature measuring probe which is arranged at an outer pipe wall surface of a to-be-detected pipe and is used for measuring the temperature of the outer pipe wall surface of the to-be-detected pipe, a middle storage device used for receiving and storing atemperature measuring signal transmitted by the temperature measuring probe, and a portable mobile terminal which is plugged on the middle storage device and is used for receiving the temperature of the outer pipe wall surface of the to-be-detected pipe from the middle storage device and acquiring thickness of the pipe wall of the to-be-detected pipe based on the heat conduction condition. The device is advantaged in that dismounting temperature insulation equipment and setting scaffolds can be omitted, a lot of human resources are saved, high efficiency is achieved, one-time investment is achieved, cost for calibration of the temperature measuring probe and periodic maintenance of the mobile terminal is only required, and economic property is further achieved.

Description

technical field [0001] The invention relates to the technical field of safety of nuclear power plants, in particular to a detection device and method for tube wall thinning of conventional islands of nuclear power plants. Background technique [0002] The conventional island of a nuclear power plant includes a secondary circuit water supply / steam supply system. The medium of this type of steam system is mostly high-energy steam, vapor-liquid two-phase, and condensed water. They have strong erosion / erosion capabilities for secondary circuit equipment, especially pipelines. For the sudden thinning and damage of important system pipe fittings or pipe inner walls of the secondary circuit, the nuclear power plant will periodically (usually a refueling overhaul) inspect some sensitive pipes and pipe fittings according to the in-service inspection program to evaluate the thinning situation. [0003] At present, nuclear power plants use ultrasonic flaw detection (UT) to detect sensi...

Claims

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Application Information

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IPC IPC(8): G01B21/08G01K7/02G01K1/14G01K1/143
CPCG01B21/085G01K1/14G01K7/02
Inventor 齐宇博李剑波艾华宁
Owner CHINA NUCLEAR POWER TECH RES INST CO LTD
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