Study of Lamb Waves for Non-Destructive Testing Behind Screens

The inspection and control of sodium-cooled fast reactors (SFR) is a major issue for the nuclear industry. Ultrasonic solutions are under study because of the opacity of liquid sodium. In this paper, the use of leaky Lamb waves is considered for non-destructive testing (NDT) on parallel and immersed...

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Bibliographic Details
Main Authors: Kauffmann, P., Ploix, M.-A., Chaix, J.-F., Gueudré, C., Corneloup, G., Baqué, F.
Format: Conference Proceeding
Language:English
Subjects:
Destructive testing
Fast nuclear reactors
Fourier transforms
Group velocity
Inspection
Lamb waves
Leaky Lamb waves
Liquid sodium
Mathematical models
Non-Destructive Testing (NDT)
Nondestructive testing
Phase velocity
Plates (structural members)
Re-emission
Screens
Sodium Fast Reactor (SFR)
Ultrasound
Wave attenuation
Wave propagation
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Summary:The inspection and control of sodium-cooled fast reactors (SFR) is a major issue for the nuclear industry. Ultrasonic solutions are under study because of the opacity of liquid sodium. In this paper, the use of leaky Lamb waves is considered for non-destructive testing (NDT) on parallel and immersed structures assimilated as plates. The first phase of our approach involved studying the propagation properties of leaky Lamb waves. Equations that model the propagation of Lamb waves in an immersed plate were solved numerically. The phase velocity can be experimentally measured using a two dimensional Fourier transform. The group velocity can be experimentally measured using a short-time Fourier transform technique. Attenuation of leaky Lamb waves is mostly due to the re-emission of energy into the surrounding fluid, and it can be measured by these two techniques.
ISSN:2100-014X
2101-6275
2100-014X
DOI:10.1051/epjconf/201817003005