Event Title

Lamb Wave Tomography for Imagimg Erosion/Corrosion in Piping

Location

Snowbird, UT, USA

Start Date

1-1-1999 12:00 AM

Description

The costs for inspecting nuclear power plant piping are growing as plants age, due to increasing requirements. The way in which inspections are done at present requires the removal of the insulation, the layout of a grid on the region of interest, and then the manual placement of a transducer on each grid point for a thickness measurement. This takes a considerable amount of time during which the operator is exposed to radiation. Estimated costs are $2,000 to $10,000 per location. As well, thinning occurring between grid points may be missed. A technique, based on Lamb wave tomography, has potential to reduce costs by obviating the need to remove insulation, and speeding up the data taking process by electronic switching. As well, the method provides images that contain data that might have fallen between grid points in the manual method.

Book Title

Review of Progress in Quantitative Nondestructive Evaluation

Volume

18A

Chapter

Chapter 3: Simulations, Signal Processing, Tomography, and Holography

Section

Tomography and Holography

Pages

967-973

DOI

10.1007/978-1-4615-4791-4_124

Language

en

File Format

application/pdf

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Jan 1st, 12:00 AM

Lamb Wave Tomography for Imagimg Erosion/Corrosion in Piping

Snowbird, UT, USA

The costs for inspecting nuclear power plant piping are growing as plants age, due to increasing requirements. The way in which inspections are done at present requires the removal of the insulation, the layout of a grid on the region of interest, and then the manual placement of a transducer on each grid point for a thickness measurement. This takes a considerable amount of time during which the operator is exposed to radiation. Estimated costs are $2,000 to $10,000 per location. As well, thinning occurring between grid points may be missed. A technique, based on Lamb wave tomography, has potential to reduce costs by obviating the need to remove insulation, and speeding up the data taking process by electronic switching. As well, the method provides images that contain data that might have fallen between grid points in the manual method.