Electricity: measuring and testing – Magnetic – With means to create magnetic field to test material
Reexamination Certificate
2008-07-29
2008-07-29
Aurora, Reena (Department: 2862)
Electricity: measuring and testing
Magnetic
With means to create magnetic field to test material
C324S242000, C324S262000
Reexamination Certificate
active
07405558
ABSTRACT:
A method to determine deposits in a steam generator having the steps of creating a calibration standard having at least two rings of deposit material, subjecting the calibration standard to an eddy current signal, wherein an amplitude of the signal reflected from the calibration standard is used to obtain a polynomial equation fit of the reflected eddy current signals to actual thickness of the rings, obtaining a steam generator with tubes, initiating an eddy current signal into the tubes of the steam generator, detecting and recording reflections of the eddy current signal initiated into the tubes of the steam generator, and determining a thickness of the deposits in the steam generator from the recorded reflections of the eddy current signal and the polynomial equation.
REFERENCES:
patent: 5581037 (1996-12-01), Kwun et al.
patent: 6271670 (2001-08-01), Caffey
Framatome ANP (now AREVA NP), “Modeling of Upper Bundle Deposits”, Carl Thurston, presented at the EPRI Steam Generator Secondary Side Management Conference, Feb. 10-12, 2003.
Westinghouse, “A Strategic Thinking to Draw Benefit from Tube Scale for Boiling Enhancement”, M. H. Hu, presented at the EPRI Steam Generator Secondary Side Management Conference, Feb. 10-12, 2003.
Dominion Engineering, Inc., “Thermal Performance Trends in Replacement Steam Generators”, Marc Kreider, Glenn White and Robert Varrin, Jr., presented at the EPRI Steam Generator Secondary Side Management Conference, Feb. 10-12, 2003.
Dominion Engineering, Inc., “Economic Evaluation of Steam Generator Secondary Management Strategies at Plant Vogtle”, Marc Kreider, Glenn White and Robert Varrin, Jr., presented at the EPRI Steam Generator Secondary Side Management Conference, Feb. 10-12, 2003.
Westinghouse, “Scale Profiling Coupled with Quatrefoil Blockage Assessment Technology and Visual Inspection”, Susan Wozniak, Earl Morgan, Dan Yaklich, John Balavage, Jon.Barkich and Chris Hu, presented at the 23rd Steam Generator NDE Workshop, Jul. 12-14, 2004.
Fleck Jeffrey M.
Griffith John
Newman Victor
Wyatt Joseph R.
Areva NP Inc.
Aurora Reena
Kenyon & Kenyon LLP
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