Eddy current for the characterization of broached tube support plate blockage
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United States of America Patent
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Sep 3, 2013
Grant Date -
Jan 27, 2011
app pub date -
Feb 8, 2010
filing date -
Jul 24, 2009
priority date (Note) -
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Abstract
A method for determining tube support plate blockage of a steam generator includes the following steps: measuring at least five different eddy current values per tube support intersection; calculating a nominal clean fit radius of flow hole; determining a center signal response; converting the center signal response to a deposit thickness; determine an edge reduction; converting the edge reduction to an edge thickness; calculating the resulting flow hole radius; verifying the reasonableness of the resulting flow hole radius; and determining a virtual calibration range.
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