Eddy-current inspection for steam-generator-tubing program quarterly progress report for period ending March 31, 1982. [PWR]

Technical Report · Wed Sep 01 04:00:00 EDT 1982

OSTI ID:6810835

Dodd, C V; Deeds, W E; McClung, R W

Eddy-current methods provide the best in-service inspection of steam generator tubing, but these techniques can produce ambiguity because of the many independent variables that affect the signals. This development program has used mathematical models and has developed or modified computer programs to design optimum probes, instrumentation, and techniques for multifrequency multiproperty examinations. Interactive calculations and experimental measurements have been made with modular eddy-current instrumentation and a minicomputer. These establish the coefficients for the complex equations that define the values of the desired properties (and the attainable accuracy) despite changes in other significant variables. The computer programs for calculating the accuracy with which various properties can be measured indicate that the tubing wall thickness and the defect size can be measured much more accurately than is required, even when other properties vary.

• Research Organization: Oak Ridge National Lab., TN (USA)
• DOE Contract Number: W-7405-ENG-26
• OSTI ID: 6810835
• Report Number(s): NUREG/CR-2824-Vol.1; ORNL/TM-8418-Vol.1; ON: DE82022526
• Country of Publication: United States
• Language: English

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ELECTROMAGNETIC TESTING
IN-SERVICE INSPECTION
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