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http://dx.doi.org/10.14773/cst.2018.17.6.292

Technology for the Detection of Corrosion Defects in Buried Pipes of Nuclear Power Plants with 3D FEM  

Kim, Jae-Won (Power Engineering Research Institute, KEPCO Engineering & Construction Company)
Lim, Bu-Taek (Materials Engineering Department, KEPCO Engineering & Construction Company)
Park, Heung-Bae (Power Engineering Research Institute, KEPCO Engineering & Construction Company)
Chang, Hyun-Young (Power Engineering Research Institute, KEPCO Engineering & Construction Company)
Publication Information
Corrosion Science and Technology / v.17, no.6, 2018 , pp. 292-300 More about this Journal
Abstract
The modeling of 3D finite elements based on CAD data has been used to detect sites of corrosion defects in buried pipes. The results generated sophisticated profiles of electrolytic potential and vectors of current distributions on the earth surface. To identify the location of defects in buried pipes, the current distribution on the earth surface was projected to a plane of incidence that was identical to the pipe locations. The locations of minimum electrolytic potential value were found. The results show adequate match between the locations of real and expected defects based on modeling. In addition, the defect size can be calculated by integrating the current density curve. The results show that the defect sizes were $0.74m^2$ and $0.69m^2$, respectively. This technology may represent a breakthrough in the detection of indirect damage in various cases involving multiple defects in size and shape, complex/cross pipe systems, multiple anodes and stray current.
Keywords
Nuclear Power Plant; Buried Pipe; Indirect Inspection; FEM; Corrosion;
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