Electricity: measuring and testing – Magnetic – Combined
Patent
1989-08-04
1990-12-18
Eisenzopf, Reinhard J.
Electricity: measuring and testing
Magnetic
Combined
376248, 235462, 235487, G01N 2790, G01R 3312
Patent
active
049789171
ABSTRACT:
In a method for nondestructive measurement of the heat affected zone of an identification code on a nuclear fuel rod tube, the change in impedance of an electromagnetic coil produced by a portion of the tube to be etched with a bar code is measured before and after the etching of the bar code is performed by use of laser power. The impedance change in the coil produced by the bar code-bearing tube portion is compared with the impedance change produced in the coil by the same tube portion before the bar code is generated thereon to determine whether a maximum allowed depth of the heat affected zone of the tube portion has been exceeded.
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Goldenfield Mark P.
Lambert David V.
Shannon Robert E.
Edmonds Warren S.
Eisenzopf Reinhard J.
Westinghouse Electric Corp.
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