ISSN:
1662-8985
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:
Steam generators(SG) of the Korean nuclear power plants were replaced with a new oneafter a 20 year operation. A metallographic examination of the defected tubes is needed for settingup a guide line for a safe operation of the other SG. A destructive analysis of 50 tubes wasaddressed, and a relationship between the SCC defect location and defect depth wasobtained. Tubes extracted from the retired SG were transferred to a hot laboratory. Detailednondestructive analysis examinations were taken, then the tubes were destructively examined.Types and sizes of the defects were characterized. A location and depth of the SCC were evaluatedin terms of the location and height of the sludge. Most axial cracks were in the sludge pile, whereasthe circumferential ones were around the top of the tube sheet(TTS) or below the TTS. Cracks werefound with various lengths in a specific zone. Average defect depth of the axial cracks was deeperthan that of the circumferential ones
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/40/transtech_doi~10.4028%252Fwww.scientific.net%252FAMR.26-28.1213.pdf
