3D 유한요소법을 이용한 원전 매설배관 부식결함 탐상기술 개발

• Published in: Corrosion science and technology Vol. 17; no. 6; pp. 292 - 300
• Main Authors: 김재원, 임부택, 박흥배, 장현영, Kim, Jae-Won, Lim, Bu-Taek, Park, Heung-Bae, Chang, Hyun-Young
• Format: Journal Article
• Language: Korean
• Published: 한국부식방식학회 01.12.2018
• Subjects: 금속공학; Indirect Inspection; Buried Pipe; Corrosion; Nuclear Power Plant; FEM
• ISSN: 1598-6462; 2288-6524
• DOI: 10.14773/cst.2018.17.6.292

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.