Journal
NUCLEAR ENGINEERING AND DESIGN
Volume 236, Issue 13, Pages 1411-1421Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.nucengdes.2006.01.007
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The objective of this study is to demonstrate that a condition-monitoring system based on acoustic emission (AE) detection can provide timely detection of check valve degradation and service aging so that maintenance or replacement can be preformed prior to the loss of safety function. This research is focused on the investigation and understanding of the capability of the acoustic emission technique to provide diagnostic information on check valve failures. AE testing for a check valve under controlled flow loop conditions was performed to detect and valve degradation such as wear and leakage due to foreign object interference. It is clearly demonstrated that the distinction of different types of failure were successful by systematically analyzing the characteristics of various AE parameters. (c) 2006 Elsevier B.V. All rights reserved.
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