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Graphite coating thickness measurement method

A technology of graphite coating and measuring method, which is applied in the field of heavy water reactor nuclear power fuel element manufacturing, can solve problems such as inaccurate measurement results and coating wear, and achieve the effects of not easy to wear, simple processing and high reliability

Inactive Publication Date: 2016-07-27
CHINA NUCLEAR BAOTOU GUANGHUA CHEM IND
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Problems solved by technology

[0003] The purpose of the present invention is to solve the problem that the existing graphite coating measurement method is easy to cause wear to the coating, thus resulting in inaccurate measurement results, and provides a simple operation, high measurement accuracy, and can perform repeated measurements A kind of measuring method of graphite coating thickness

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Embodiment Construction

[0022] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0023] Such as figure 1 Shown, a kind of graphite coating thickness measuring method comprises the steps:

[0024] The first step: the selection of materials for graphite coating measurement standard parts;

[0025] Choose stainless steel to make graphite-coated measurement standard parts.

[0026] The second step: processing graphite coating measurement standard parts;

[0027] Such as figure 2 with image 3 As shown, a stainless steel tube with an inner diameter of 12mm, a wall thickness of 2mm and a length of 30mm is processed as a graphite coating measurement standard.

[0028] The third step: determine the equivalent thickness value;

[0029] A graphite coating of known thickness is used to calibrate the thickness gauge, the thickness gauge model MICRODERM700. Measure the equivalent thickness value of the graphite coating measurement standa...

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Abstract

The present invention relates to the technical field of heavy water reactor nuclear fuel element manufacturing, particularly relates to a graphite coating thickness measurement method, and aims to solve the problem of an inaccurate measurement result caused by the easy abrasion of a coating by an existing graphite coating measurement method. The graphite coating thickness measurement method is characterized in that the method comprises the steps of selecting a graphite coating measurement standard element material, processing a graphite coating measurement standard element, determining an equivalent thickness value, calibrating a thickness measurement instrument by using the graphite coating measurement standard element, and measuring the thickness of the tested work piece graphite coating thickness. The graphite coating measurement tool of the invention has the advantages of simple processing, high reliability, little possibility of wear, and long-term repeated use. After an equivalent thickness value is determined, the tool can be reused for many times, the re-calibration of each measurement is not needed, and the cost of re-calibration is saved.

Description

technical field [0001] The invention relates to the technical field of manufacturing heavy water reactor nuclear power fuel elements, in particular to a method for measuring the thickness of a graphite coating. Background technique [0002] The thickness measurement of the graphite coating on the inner wall of the cladding tube is a special inspection process for the production of CANDU-6 heavy water reactor nuclear fuel elements. In order to verify whether the thickness of the graphite coating on the inner wall of the cladding tube meets the requirements of the technical conditions, graphite coating Measure the thickness and ensure that the accuracy of the test results meets the technical requirements. At present, there is no relevant graphite coating thickness standard developed in China. In addition, the graphite coating measurement method used abroad is easy to wear the coating during use, and the measurement accuracy will be affected after the wear; the other is to use...

Claims

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Application Information

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IPC IPC(8): G01B21/08
Inventor 张俊杰十双庆顾小林郭吉龙安淑云姚建
Owner CHINA NUCLEAR BAOTOU GUANGHUA CHEM IND
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