Electricity: measuring and testing – Magnetic – With means to create magnetic field to test material
Patent
1988-10-25
1990-03-06
Strecker, Gerard R.
Electricity: measuring and testing
Magnetic
With means to create magnetic field to test material
324233, G01N 2782
Patent
active
049069276
ABSTRACT:
An eddy current flaw detecting apparatus comprises a pair of detection coils each connected in adjoining arms of flaw detecting bridge circuit, the planes containing the pair of coils are arranged in parallel and inclined to the axis of a fuel clad pipe being examined at an inclination angle between 75.degree. and 85.degree. and an arrangement for rotating the fuel clad pipe relative to the pair of detection coils, when a flaw is detected while moving the fuel clad pipe relative to the pair of detection coils, to obtain a characteristic curve between a flaw signal output and turning angle in order to determine direction of the flaw, such as circumferential and axial, in comparison with characteristic curves between a flaw signal output and turning angle obtained in advance with respect to standard flaw testing pieces.
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Tsukui Kazushige
Urata Megumu
Edmonds Warren S.
Nippon Nuclear Fuel Development Co., Ltd.
Strecker Gerard R.
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