In-service inspection for steam generator tubing using multiple frequency eddy-current techniques

Conference · Mon Jan 01 00:00:00 EST 1979

OSTI ID:5425573

Dodd, C. V.; Deeds, W. E.

A rapid, accurate, and easy-to-use inspection method for steam generator tubes is clearly needed and not entirely provided by our present eddy-current tests. The signals from eddy-current tests are affected by changes in tube wall thickness, the location and size of defects, the electrical conductivity, the magnetic permeability, and the tube-to-tube support spacing and denting (which changes the probe to tube spacing). Simultaneous variations in these test properties produce signals that are ambiguous in present commercial eddy-current instruments. However, this type of multiple property eddy-current testing can be done using pulsed techniques or multiple frequencies. A systematic, automated process has been developed at ORNL to allow rapid development of accurate multiple property eddy-current tests.

• Research Organization: Oak Ridge National Lab., TN (USA)
• DOE Contract Number: W-7405-ENG-26
• OSTI ID: 5425573
• Report Number(s): CONF-790947-2
• Resource Relation: Conference: Symposium on eddy current characterization of materials and structures, Gaithersburg, MD, USA, 5 Sep 1979
• Country of Publication: United States
• Language: English

Related Subjects

47 OTHER INSTRUMENTATION
21 SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS
20 FOSSIL-FUELED POWER PLANTS
EDDY CURRENT TESTING
FOSSIL-FUEL POWER PLANTS
STEAM GENERATORS
NUCLEAR POWER PLANTS
PWR TYPE REACTORS
IN-SERVICE INSPECTION
ACCURACY
ELECTRONIC CIRCUITS
BOILERS
ELECTROMAGNETIC TESTING
INSPECTION
MATERIALS TESTING
NONDESTRUCTIVE TESTING
NUCLEAR FACILITIES
POWER PLANTS
REACTORS
TESTING
THERMAL POWER PLANTS
VAPOR GENERATORS
WATER COOLED REACTORS
WATER MODERATED REACTORS
440300* - Miscellaneous Instruments- (-1989)
210200 - Power Reactors
Nonbreeding
Light-Water Moderated
Nonboiling Water Cooled
200104 - Fossil-Fueled Power Plants- Components