Studies Into the Use of Non-linear Ultrasound to Detect Corroded Steel Plates Embedded in Concrete
(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:
https://lup.lub.lu.se/record/363e607b-d58f-4552-a8ca-990a56442b2d
- author
- Nilsson, Markus LU ; Ulriksen, Peter LU and Rydén, Nils LU
- organization
- publishing date
- 2023
- 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}}, }