Abstract
To overcome these challenges, a mock-up wall representing a section of the concrete containment of the NPP. The mock-up wall included simulated defects, which mimic the most common types of defects in NPP concrete structures such as dimensional errors, honeycombing, delamination, defects adjacent to the steel liner and voids in grouted tendon ducts for the posttensioned
structures. This paper introduce the design and construction of the wall including the concrete properties, reinforcement, tendon ducts and the types of the simulated defects. The paper also introduces the NDT methods and techniques that are suitable for assessing the condition of the mock-up wall under the real environmental conditions. These techniques include mechanical
methods as rebound hammer, ultrasonic and electromagnetic methods. This mock-up wall will enable to investigate reliably available NDT methods and experts’ skills providing also an important and very much need educational platform for future NDE experts.
| Original language | English |
|---|---|
| Title of host publication | SMiRT 25, August 4-9, 2019, Charlotte, NC, USA |
| Subtitle of host publication | Division IX |
| Publisher | International Assn for Structural Mechanics in Reactor Technology IASMiRT |
| Number of pages | 12 |
| Publication status | Published - 2019 |
| MoE publication type | A4 Article in a conference publication |
| Event | International Conference on Structural Mechanics in Reactor Technology, SMiRT 25 - Charlotte, United States Duration: 4 Aug 2019 → 9 Aug 2019 Conference number: 25 |
Conference
| Conference | International Conference on Structural Mechanics in Reactor Technology, SMiRT 25 |
|---|---|
| Abbreviated title | SMiRT |
| Country | United States |
| City | Charlotte |
| Period | 4/08/19 → 9/08/19 |
Fingerprint
Keywords
- NDE
- concrete
- thick-walled
- defects
- deterioration
- steel liner
Cite this
}
Design, construction, and NDT of a mock-up for reinforced concrete walls in NPP. / Al-Neshawy, Fahim; Ferreira, Rui Miguel; Bohner, Edgar; Ojala, Teemu; Sjöblom, Ville; Niederleithinger, Ernst; Effner, Ute; Puttonen, Jari.
SMiRT 25, August 4-9, 2019, Charlotte, NC, USA: Division IX. International Assn for Structural Mechanics in Reactor Technology IASMiRT , 2019.Research output: Chapter in Book/Report/Conference proceeding › Conference article in proceedings › Scientific › peer-review
TY - GEN
T1 - Design, construction, and NDT of a mock-up for reinforced concrete walls in NPP
AU - Al-Neshawy, Fahim
AU - Ferreira, Rui Miguel
AU - Bohner, Edgar
AU - Ojala, Teemu
AU - Sjöblom, Ville
AU - Niederleithinger, Ernst
AU - Effner, Ute
AU - Puttonen, Jari
PY - 2019
Y1 - 2019
N2 - Construction methods, environmental stressors, and aging factors are the main causes for defects of reinforced concrete in nuclear power plants (NPP). These defects are typically occurred as corrosion of reinforcement steel, delamination, cracks, malfunction of post-tensioning or steel composite systems etc. Some of the challenges for assessing the performance of these structures by nondestructive testing methods (NDT) are that the assessment could be performed only during the annual overhauls when testing is time-limited and uncertainty of the accuracy and reliability of the available NDT testing devices combined with the lack of the international uniformity of the methods used for NDT tests.To overcome these challenges, a mock-up wall representing a section of the concrete containment of the NPP. The mock-up wall included simulated defects, which mimic the most common types of defects in NPP concrete structures such as dimensional errors, honeycombing, delamination, defects adjacent to the steel liner and voids in grouted tendon ducts for the posttensionedstructures. This paper introduce the design and construction of the wall including the concrete properties, reinforcement, tendon ducts and the types of the simulated defects. The paper also introduces the NDT methods and techniques that are suitable for assessing the condition of the mock-up wall under the real environmental conditions. These techniques include mechanicalmethods as rebound hammer, ultrasonic and electromagnetic methods. This mock-up wall will enable to investigate reliably available NDT methods and experts’ skills providing also an important and very much need educational platform for future NDE experts.
AB - Construction methods, environmental stressors, and aging factors are the main causes for defects of reinforced concrete in nuclear power plants (NPP). These defects are typically occurred as corrosion of reinforcement steel, delamination, cracks, malfunction of post-tensioning or steel composite systems etc. Some of the challenges for assessing the performance of these structures by nondestructive testing methods (NDT) are that the assessment could be performed only during the annual overhauls when testing is time-limited and uncertainty of the accuracy and reliability of the available NDT testing devices combined with the lack of the international uniformity of the methods used for NDT tests.To overcome these challenges, a mock-up wall representing a section of the concrete containment of the NPP. The mock-up wall included simulated defects, which mimic the most common types of defects in NPP concrete structures such as dimensional errors, honeycombing, delamination, defects adjacent to the steel liner and voids in grouted tendon ducts for the posttensionedstructures. This paper introduce the design and construction of the wall including the concrete properties, reinforcement, tendon ducts and the types of the simulated defects. The paper also introduces the NDT methods and techniques that are suitable for assessing the condition of the mock-up wall under the real environmental conditions. These techniques include mechanicalmethods as rebound hammer, ultrasonic and electromagnetic methods. This mock-up wall will enable to investigate reliably available NDT methods and experts’ skills providing also an important and very much need educational platform for future NDE experts.
KW - NDE
KW - concrete
KW - thick-walled
KW - defects
KW - deterioration
KW - steel liner
M3 - Conference article in proceedings
BT - SMiRT 25, August 4-9, 2019, Charlotte, NC, USA
PB - International Assn for Structural Mechanics in Reactor Technology IASMiRT
ER -