Field experiences with multifrequency-multiparameter eddy-current technology. [PWR]

Technical Report · Mon Mar 01 04:00:00 EST 1982

OSTI ID:5239367

Brown, S

A multifrequency/multiparameter eddy current system has been assembled for the inservice inspection of pressurized water reactor steam generator tubing. Five steam generators were inspected for a total data base of approximately 11,000 tubes. Based on a comparison with conventional single frequency inspection methods, multifrequency/multiparameter eddy current technology offers significant improvements. Multifrequency eddy current, with its multiple frequency coil excitation, can offer benefits in reducing in-containment data acquisition time by the performance of parallel tube tests; in addition the resulting broad spectrum data base is useful for the analysis of complex or non-unique signals which can arise during a steam generator inspection. Multiparameter eddy current offers an approach for the real-time suppression of extraneous variables such as support plates/tube sheet, ID noise and denting. With appropriate mixing/basis frequency combinations, tube degradation in the presence of the extraneous variables can be more reliably detected and characterized.

• Research Organization: Battelle Columbus Labs., OH (USA); Jones (J.A.) Applied Research Co., Charlotte, NC (USA)
• OSTI ID: 5239367
• Report Number(s): EPRI-NP-2299; ON: DE82903311
• Country of Publication: United States
• Language: English

Related Subjects

21 SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS
210200* -- Power Reactors
Nonbreeding
Light-Water Moderated
Nonboiling Water Cooled
BOILERS
EDDY CURRENT TESTING
ELECTROMAGNETIC TESTING
IN-SERVICE INSPECTION
INSPECTION
MATERIALS TESTING
NONDESTRUCTIVE TESTING
PWR TYPE REACTORS
REACTORS
STEAM GENERATORS
TESTING
TUBES
VAPOR GENERATORS
WATER COOLED REACTORS
WATER MODERATED REACTORS