Journal of the Magnetics Society of Japan
Online ISSN : 1880-4004
Print ISSN : 0285-0192
ISSN-L : 0285-0192
Instrument/Magnetics
Method for Measuring the Overlay-Clad Thickness of Reactor Pressure Vessels by Magnetic Measurements
N. EbineK. Ara
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JOURNAL OPEN ACCESS

1998 Volume 22 Issue 4_2 Pages 905-908

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Abstract
The thickness of the non-magnetic stainless steel overlay-clad of a simulated nuclear reactor pressure vessel (RPV) wall was nondestructively measured by a magnetic method. A part of the wall steel was magnetized with a two-pole magnetic yoke through the overlay-clad, and the magnetic field distribution on the surface of the overlay-clad was measured in the vicinity of one of the poles. The overlay-clad thickness was then determined from the center value and the half-width of the pattern of the measured magnetic field distribution. The thickness can be determined irrespective of the magnetic state of the steels used in the vessel.
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© 1998 by The Magnetics Society of Japan
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