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
CN105806291AInactive Publication Date: 2016-07-27CHINA NUCLEAR BAOTOU GUANGHUA CHEM IND
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
CHINA NUCLEAR BAOTOU GUANGHUA CHEM IND
Publication Date
2016-07-27
Estimated Expiration
Not applicable · inactive patent

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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.
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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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