ON-POWER DETECTION OF PIPE WALL-THINNED DEFECTS USING IR THERMOGRAPHY IN NPPS
Wall-thinned defects caused by accelerated corrosion due to fluid flow in the inner pipe appear in many structures of the secondary systems in nuclear power plants (NPPs) and are a major factor in degrading the integrity of pipes. Wall-thinned defects need to be managed not only when the NPP is unde...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2014-04-01
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| Series: | Nuclear Engineering and Technology |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S1738573315301662 |
| _version_ | 1828444354978512896 |
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| author | JU HYUN KIM KWAE HWAN YOO MAN GYUN NA JIN WEON KIM KYEONG SUK KIM |
| author_facet | JU HYUN KIM KWAE HWAN YOO MAN GYUN NA JIN WEON KIM KYEONG SUK KIM |
| author_sort | JU HYUN KIM |
| collection | DOAJ |
| description | Wall-thinned defects caused by accelerated corrosion due to fluid flow in the inner pipe appear in many structures of the secondary systems in nuclear power plants (NPPs) and are a major factor in degrading the integrity of pipes. Wall-thinned defects need to be managed not only when the NPP is under maintenance but also when the NPP is in normal operation. To this end, a test technique was developed in this study to detect such wall-thinned defects based on the temperature difference on the surface of a hot pipe using infrared (IR) thermography and a cooling device. Finite element analysis (FEA) was conducted to examine the tendency and experimental conditions for the cooling experiment. Based on the FEA results, the equipment was configured before the cooling experiment was conducted. The IR camera was then used to detect defects in the inner pipe of the pipe specimen that had artificially induced defects. The IR thermography developed in this study is expected to help resolve the issues related to the limitations of non-destructive inspection techniques that are currently conducted for NPP secondary systems and is expected to be very useful on the NPPs site. |
| first_indexed | 2024-12-10T21:42:27Z |
| format | Article |
| id | doaj.art-119b091dd66d4a7397b022c1f66812ac |
| institution | Directory Open Access Journal |
| issn | 1738-5733 |
| language | English |
| last_indexed | 2024-12-10T21:42:27Z |
| publishDate | 2014-04-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Nuclear Engineering and Technology |
| spelling | doaj.art-119b091dd66d4a7397b022c1f66812ac2022-12-22T01:32:27ZengElsevierNuclear Engineering and Technology1738-57332014-04-0146222523410.5516/NET.04.2013.078ON-POWER DETECTION OF PIPE WALL-THINNED DEFECTS USING IR THERMOGRAPHY IN NPPSJU HYUN KIM0KWAE HWAN YOO1MAN GYUN NA2JIN WEON KIM3KYEONG SUK KIM4Department of Nuclear Engineering, Chosun University 309 Pilmun-daero, Dong-gu, Gwangju 501-759, Republic of KoreaDepartment of Nuclear Engineering, Chosun University 309 Pilmun-daero, Dong-gu, Gwangju 501-759, Republic of KoreaDepartment of Nuclear Engineering, Chosun University 309 Pilmun-daero, Dong-gu, Gwangju 501-759, Republic of KoreaDepartment of Nuclear Engineering, Chosun University 309 Pilmun-daero, Dong-gu, Gwangju 501-759, Republic of KoreaDepartment of Mechanical Design Engineering, Chosun University 309 Pilmun-daero, Dong-gu, Gwangju 501-759, Republic of KoreaWall-thinned defects caused by accelerated corrosion due to fluid flow in the inner pipe appear in many structures of the secondary systems in nuclear power plants (NPPs) and are a major factor in degrading the integrity of pipes. Wall-thinned defects need to be managed not only when the NPP is under maintenance but also when the NPP is in normal operation. To this end, a test technique was developed in this study to detect such wall-thinned defects based on the temperature difference on the surface of a hot pipe using infrared (IR) thermography and a cooling device. Finite element analysis (FEA) was conducted to examine the tendency and experimental conditions for the cooling experiment. Based on the FEA results, the equipment was configured before the cooling experiment was conducted. The IR camera was then used to detect defects in the inner pipe of the pipe specimen that had artificially induced defects. The IR thermography developed in this study is expected to help resolve the issues related to the limitations of non-destructive inspection techniques that are currently conducted for NPP secondary systems and is expected to be very useful on the NPPs site.http://www.sciencedirect.com/science/article/pii/S1738573315301662IR ThermographyWall-thinned DefectsIR CameraCooling DeviceFinite Element Analysis (FEA)On-power Inspection |
| spellingShingle | JU HYUN KIM KWAE HWAN YOO MAN GYUN NA JIN WEON KIM KYEONG SUK KIM ON-POWER DETECTION OF PIPE WALL-THINNED DEFECTS USING IR THERMOGRAPHY IN NPPS Nuclear Engineering and Technology IR Thermography Wall-thinned Defects IR Camera Cooling Device Finite Element Analysis (FEA) On-power Inspection |
| title | ON-POWER DETECTION OF PIPE WALL-THINNED DEFECTS USING IR THERMOGRAPHY IN NPPS |
| title_full | ON-POWER DETECTION OF PIPE WALL-THINNED DEFECTS USING IR THERMOGRAPHY IN NPPS |
| title_fullStr | ON-POWER DETECTION OF PIPE WALL-THINNED DEFECTS USING IR THERMOGRAPHY IN NPPS |
| title_full_unstemmed | ON-POWER DETECTION OF PIPE WALL-THINNED DEFECTS USING IR THERMOGRAPHY IN NPPS |
| title_short | ON-POWER DETECTION OF PIPE WALL-THINNED DEFECTS USING IR THERMOGRAPHY IN NPPS |
| title_sort | on power detection of pipe wall thinned defects using ir thermography in npps |
| topic | IR Thermography Wall-thinned Defects IR Camera Cooling Device Finite Element Analysis (FEA) On-power Inspection |
| url | http://www.sciencedirect.com/science/article/pii/S1738573315301662 |
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