Location

La Jolla, CA

Start Date

1-1-1998 12:00 AM

Description

Conventional eddy current bobbin probes are known to be ineffectual in detecting circumferential cracks in tubing. Rotating pancake and/or multi-pancake probes are required to detect circumferential cracks. However, it has been demonstrated in CANDU® (CANada Deuterium Uranium nuclear reactor) steam generator tubes with deformation and ferromagnetic deposits that probes with surface transmit-receive (T/R) coils are superior to those using surface impedance coils. No subsurface cracks in this tubing were detected with rotating impedance pancake coil probes and multiplexed impedance probes. In the same tubing, circumferential cracks as shallow as 50% through-wall were detected with a single-pass C3 multiplexed T/R probe.

Book Title

Review of Progress in Quantitative Nondestructive Evaluation

Volume

17A

Chapter

Chapter 1: Standard Techniques

Section

Eddy Currents

Pages

283-289

DOI

10.1007/978-1-4615-5339-7_36

Language

en

File Format

application/pdf

Share

COinS
 
Jan 1st, 12:00 AM

Computer Modeling of Eddy Current Transmit-Receive Probes for Tube Inspection

La Jolla, CA

Conventional eddy current bobbin probes are known to be ineffectual in detecting circumferential cracks in tubing. Rotating pancake and/or multi-pancake probes are required to detect circumferential cracks. However, it has been demonstrated in CANDU® (CANada Deuterium Uranium nuclear reactor) steam generator tubes with deformation and ferromagnetic deposits that probes with surface transmit-receive (T/R) coils are superior to those using surface impedance coils. No subsurface cracks in this tubing were detected with rotating impedance pancake coil probes and multiplexed impedance probes. In the same tubing, circumferential cracks as shallow as 50% through-wall were detected with a single-pass C3 multiplexed T/R probe.