ISSN:
1013-9826
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
Most of the corrosive degradations in steam generator tubes of nuclear power plants areclosely related to the residual stress existing in the local region of a geometric change, that is, anexpansion transition, u-bend, ding, dent, bulge, etc. Therefore, accurate information on a geometricanomaly in a tube is a prerequisite to the activity of a non destructive inspection for a precise andearlier detection of a defect in order to prevent a failure during an operation, and also for a root causeanalysis of a failure. In this paper, a newly developed eddy current technique of a three-dimensionalprofilometry is introduced and the proof for the applicability of the technique to a plant inspection isprovided. The quantitative profile measurement using a new eddy current probe was performed onsteam generator expansion mock-up tubes with various geometric anomalies typically observed in theoperating power plants, and the accuracy of the measured data was compared with those from thelaser profilometry
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/51/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.321-323.426.pdf
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