United States Nuclear Regulatory Commission - Protecting People and the Environment

Final Report on Advanced Nondestructive Evaluation for Steam Generator Tubing for the Second International Steam Generator Tube Integrity Program (NUREG/CR-6814)

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Publication Information

Manuscript Completed: December 2002
Date Published: July 2003

Prepared by:
S. Bakhtiai, J. Y. Park, D. S. Kupperman,
S. Majumdar, W. J. Shack

Argonne National Laboratory
9700 South Cass Avenue
Argonne, IL 60439

J. Muscara, NRC Project Manager

NRC Job Code W6487

Prepared for:
Division of Engineering Technology
Office of Nuclear Regulatory Research
U.S. Nuclear Regulatory Commission
Washington, DC 20555-0001

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Abstract

This report describes research activities carried out at Argonne National Laboratory (ANL) as part of the Steam Generator Tube Integrity Program sponsored by the U.S. Nuclear Regulatory Commission. As a follow-up to preceding publications on the assessment of advanced nondestructive evaluation (NDE) techniques for nservice inspection of steam generator tubing, this report provides an overview of more recent studies associated primarily with signal processing and data analysis techniques applied to' eddy current NDE data. Results of efforts made to date on implementation of various algorithms that pertain to computer-aided analysis of eddy current rotating probe data are discussed. Recent efforts on implementation of more useful data analysis tools are briefly described. As a benchmark for NDE accuracy, the production and destructive characterization of specimens with laboratory-induced cracking are described. Analysis of eddy current inspection data from a limited set of field-degraded pulled tube sections is also presented. The effect of uncertainties in NDE estimates of flaw size on the prediction of tube structural integrity is addressed.

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