Micro Eddy Current Testing by micro magnetic sensor array

Journal Article · Sat Dec 31 23:00:00 EST 1994 · IEEE Transactions on Magnetics (Institute of Electrical and Electronics Engineers); (United States)

DOI:https://doi.org/10.1109/20.364584· OSTI ID:6801458

Uesaka, Mitsuru; Nakanishi, Takahiro; Miya, Kenzo ^[1]; Komatsu, Hidenobu; Aoki, Kazuhiko ^[2]; Kasai, Kazuo ^[3]

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1. Univ. of Tokyo, Ibaraki (Japan). Nuclear Engineering Research Lab.
2. Nuclear Fuel Industries, Ltd., Osaka (Japan)
3. Sumitomo Precision Co. Ltd., Hyogo (Japan)

A micro Eddy Current Testing (ECT) system for planar thin specimens made of INCONEL 600 with flaws was proposed and developed. A micro ECT probe used here consists of a conventional pancake-type coil as an exciting coil and a micro magnetic sensor array as a set of pickup coils. Magnetic field perturbation due to a flaw was measured with high spatial resolution and signal-to-noise (S/N) ratio. The measured signals from the array were compared with numerical results obtained by a three-dimensional A-[phi] code. It was confirmed that the Micro ECT system has the potential to evaluate the length and depth of a flaw with better accuracy than that of a conventional pancake-type ECT in the stream generator tubings in a pressurized water nuclear reactor.

• OSTI ID: 6801458
• Journal Information: IEEE Transactions on Magnetics (Institute of Electrical and Electronics Engineers); (United States), Journal Name: IEEE Transactions on Magnetics (Institute of Electrical and Electronics Engineers); (United States) Vol. 31:1Pt2; ISSN IEMGAQ; ISSN 0018-9464
• Country of Publication: United States
• Language: English

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