STP738

    Detecting Acoustic Emission During Cyclic Crack Growth in Simulated BWR Environment

    Published: Jan 1981


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    Abstract

    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.

    Keywords:

    acoustic emission, spectrum analysis, crack growth monitoring, SA 533 Grade B steel, corrosion fatigue, simulated BWR environment


    Author Information:

    Nakajima, H
    Materials Engineering Laboratory, Division of Nuclear Fuel Research, Japan Atomic Energy Research Institute, Tokai-mura, Ibaraki-ken,

    Shoji, T
    Tohoku University, Sendai,

    Kikuchi, M
    Tohoku University, Sendai,

    Niitsuma, H
    Tohoku University, Sendai,

    Shindo, M
    Materials Engineering Laboratory, Division of Nuclear Fuel Research, Japan Atomic Energy Research Institute, Tokai-mura, Ibaraki-ken,


    Paper ID: STP33458S

    Committee/Subcommittee: E08.05

    DOI: 10.1520/STP33458S


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