SYMPOSIA PAPER Published: 01 January 1981
STP33458S

Detecting Acoustic Emission During Cyclic Crack Growth in Simulated BWR Environment

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An attempt is made to detect and analyze acoustic emissions from cyclic crack growth in SA 533 Grade B steel in the simulated boiling-water reactor (BWR) water environment. Significant levels of signals caused by the environment-enhanced crack growth were obtained through appropriate noise reduction techniques. By reducing the frictional noises between the loading pins and the specimen, and by characterizing the spectrum of signals emitted from various sources, discrete signal identification was made possible. From an empirical relationship between the energy of emission and the crack growth rate, the possibility of utilizing this type of acoustic emission technique was discussed in relation to future continuous monitoring of operating nuclear plants.

Author Information

Nakajima, H
Materials Engineering Laboratory, Division of Nuclear Fuel Research, Japan Atomic Energy Research Institute, Tokai-mura, Ibaraki-ken, Japan
Shoji, T
Tohoku University, Sendai, Japan
Kikuchi, M
Tohoku University, Sendai, Japan
Niitsuma, H
Tohoku University, Sendai, Japan
Shindo, M
Materials Engineering Laboratory, Division of Nuclear Fuel Research, Japan Atomic Energy Research Institute, Tokai-mura, Ibaraki-ken, Japan
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Details
Developed by Committee: E08
Pages: 139–160
DOI: 10.1520/STP33458S
ISBN-EB: 978-0-8031-4804-8
ISBN-13: 978-0-8031-0717-5