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Studies Into the Use of Non-linear Ultrasound to Detect Corroded Steel Plates Embedded in Concrete

Nilsson, Markus LU ; Ulriksen, Peter LU and Rydén, Nils LU (2023) International Conference on Non-destructive Evaluation of Concrete in Nuclear Applications p.259-267
Abstract
In some nuclear power plants, the containment liners are embedded in concrete. The purpose of the containment liner is to minimize the risk of radioactive leakage by granting a leak-tight containment building. In the presence of flaws in the surrounding concrete, such as voids, or foreign objects embedded in the concrete, there is a risk that the liner plate might corrode. This could degrade the leak tightness of the containment building, leading to an increased risk of radioactive leakage. A project is being carried out at Lund University whose purpose is to assess the capability of non-linear ultrasound to detect corroded steel plates embedded in concrete. Second harmonic analysis has been used to determine if general corrosion induced... (More)
In some nuclear power plants, the containment liners are embedded in concrete. The purpose of the containment liner is to minimize the risk of radioactive leakage by granting a leak-tight containment building. In the presence of flaws in the surrounding concrete, such as voids, or foreign objects embedded in the concrete, there is a risk that the liner plate might corrode. This could degrade the leak tightness of the containment building, leading to an increased risk of radioactive leakage. A project is being carried out at Lund University whose purpose is to assess the capability of non-linear ultrasound to detect corroded steel plates embedded in concrete. Second harmonic analysis has been used to determine if general corrosion induced an increase in acoustical non-linearity. This was done by inspecting a steel plate with varying grades of corrosion immersed in water. Results from this study indicated that severe corrosion increases the relative parameter of quadratic non-linearity ( Beta’). Beta' is given by the ratio between the second harmonic amplitude and the fundamental amplitude
squared. Building on this result, initial findings from modulation experiments on concrete cylinders with embedded steel plates with varying grades of corrosion are presented. (Less)
Please use this url to cite or link to this publication:
author
; and
organization
publishing date
type
Chapter in Book/Report/Conference proceeding
publication status
published
subject
keywords
containment liner, cossorion, non-linear ultrasound
host publication
Proceedings of the International Conference on Non-destructive Evaluation of Concrete in Nuclear Applications
editor
Al-Neshawy, Fahim ; Ferreira, Miguel ; Bohner, Edgar ; Kekäläinen, Pirkko ; Oey, Tandere and Ley, Vera
pages
259 - 267
publisher
Aalto University Publication
conference name
International Conference on Non-destructive Evaluation of Concrete in Nuclear Applications
conference location
Espoo, Finland
conference dates
2023-01-25 - 2023-01-27
ISBN
978-952-64-1140-8
project
Detection of concrete-emdedded steel liner corrosion using nonlinear ultrasound
language
English
LU publication?
yes
id
363e607b-d58f-4552-a8ca-990a56442b2d
alternative location
http://urn.fi/URN:ISBN:978-952-64-1140-8
date added to LUP
2023-03-20 08:31:28
date last changed
2023-04-04 12:42:24
@inproceedings{363e607b-d58f-4552-a8ca-990a56442b2d,
  abstract     = {{In some nuclear power plants, the containment liners are embedded in concrete. The purpose of the containment liner is to minimize the risk of radioactive leakage by granting a leak-tight containment building. In the presence of flaws in the surrounding concrete, such as voids, or foreign objects embedded in the concrete, there is a risk that the liner plate might corrode. This could degrade the leak tightness of the containment building, leading to an increased risk of radioactive leakage. A project is being carried out at Lund University whose purpose is to assess the capability of non-linear ultrasound to detect corroded steel plates embedded in concrete. Second harmonic analysis has been used to determine if general corrosion induced an increase in acoustical non-linearity. This was done by inspecting a steel plate with varying grades of corrosion immersed in water. Results from this study indicated that severe corrosion increases the relative parameter of quadratic non-linearity ( Beta’). Beta' is given by the ratio between the second harmonic amplitude and the fundamental amplitude<br/>squared. Building on this result, initial findings from modulation experiments on concrete cylinders with embedded steel plates with varying grades of corrosion are presented.}},
  author       = {{Nilsson, Markus and Ulriksen, Peter and Rydén, Nils}},
  booktitle    = {{Proceedings of the International Conference on Non-destructive Evaluation of Concrete in Nuclear Applications}},
  editor       = {{Al-Neshawy, Fahim and Ferreira, Miguel and Bohner, Edgar and Kekäläinen, Pirkko and Oey, Tandere and Ley, Vera}},
  isbn         = {{978-952-64-1140-8}},
  keywords     = {{containment liner; cossorion; non-linear ultrasound}},
  language     = {{eng}},
  pages        = {{259--267}},
  publisher    = {{Aalto University Publication}},
  title        = {{Studies Into the Use of Non-linear Ultrasound to Detect Corroded Steel Plates Embedded in Concrete}},
  url          = {{https://lup.lub.lu.se/search/files/140926997/Studies_Into_the_Use_of_Non_linear_Ultrasound_to_Detect_Corroded_Steel_Plates_Embedded_in_Concrete.pdf}},
  year         = {{2023}},
}