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Proceedings Paper

Optimized periodic inspection program for heat transfer tubing
Author(s): Eugene R. Reinhart; Stan Kaminski
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Paper Abstract

Tube failures in aging steam plant surface condensers, feedwater heaters, and oil coolers are a significant reliability problem for the electric power industry. Tube failures can also result in an increase in replacement power costs. In addition, condenser leaks from failed tubes have potentially harmful effects on major components such as steam generators and turbines. To reduce the number of tube failures and consequent leakage, periodic maintenance programs have used the nondestructive evaluation (NDE) method of eddy current testing (ET) to inspect the condition of the tubes from the water side. This NDE method can identify tubes that have experienced major degradation and should be plugged to prevent in-service failure. Variability of inspection results and difficulty in inspecting some types of tubing (Monel, carbon steel) have caused many utility sites to question the value of inspection of heat transfer tubing from the water side. Recognizing these problems, advanced ET systems have been developed that use multi-frequency, remote field, and digital data processing techniques to inspect a variety of tubing materials and produce on-site, computer generated inspection reports. These results have been used to determine tube plugging, replacement, and inspection intervals.

Paper Details

Date Published: 15 March 1998
PDF: 11 pages
Proc. SPIE 3398, Nondestructive Evaluation of Utilities and Pipelines II, (15 March 1998); doi: 10.1117/12.302517
Show Author Affiliations
Eugene R. Reinhart, Reinhart & Associates, Inc. (United States)
Stan Kaminski, Reinhart & Associates, Inc. (United States)

Published in SPIE Proceedings Vol. 3398:
Nondestructive Evaluation of Utilities and Pipelines II
Walter G. Reuter, Editor(s)

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