United States Nuclear Regulatory Commission - Protecting People and the Environment

Advanced Nondestructive Evaluation for Steam Generator Tubing (NUREG/CR-6746)

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Publication Information

Manuscript Completed: August 2001
Date Published: September 2001

Prepared by:
S. Bakhtiari, 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

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

NRC Job Code W6487

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Abstract

This report describes research activities carried out at Argonne National Laboratory (ANL) as part of the Steam Generator (SG) Tube Integrity Program sponsored by the U.S. Nuclear Regulatory Commission (USNRC). As a follow-up to a preceding publication on the assessment of advanced nondestructive evaluation (NDE) techniques for inservice 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. 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. As a benchmark for NDE accuracy, production and destructive characterization of specimens with laboratory-induced cracking are described. The effect of uncertainties in NDE estimates of flaw size on the prediction of tube structural integrity is addressed.

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