Acoustic emission analysis of fatigue failure of LMFBR primary coolant piping

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大野 博教*; 仲佐 博裕*; 町田 忠夫*; 友田 純夫*; 福島 充男*; 滝川 清*; 堀 雅夫; 植田 脩三*; 永田 敬; 菊地 政之*; 岡林 邦夫*

not registered; not registered; Machida, Tadao*; Tomoda, Yoshio*; not registered; not registered; not registered; not registered; not registered; not registered; not registered

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Recently, "acoustic emission(ae) analysis" calls attention as a dynamic and non-destructive material testing method. We can get information of material defects and cracks by catching acousticsignals from themselves, so it may be possible to know the propagation of latent cracks dynamically, to find the location of defects or to predict the failure. Therefore it may be said that this "acousticemission method" is one of the best methods of the inservice inspection of the primary coolant piping of liquid metal cooled fast breeder reactor(LMFBR). But for the application of this method, in addition to the fundamental tests, it is necessary to recognize AE characteristics of the piping by the experimental measurement of the AE signals in the cyclic loading test of the piping components. For this purpose, acontract of cooperative work was made between criepi who had much experience in AE measurement in the material tests and PNC who was doing cyclic fatigue test of the piping components. There it was agree