국내원전에 매설된 콜타르 코팅 배관의 음극방식과 FEM법을 이용한 방식성능 시뮬레이션
Protection Performance Simulation of Coal Tar-Coated Pipes Buried in a Domestic Nuclear Power Plant Using Cathodic Protection and FEM Method
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참고문헌
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초록
Coal tar-coated pipes buried in a domestic nuclear power plant have operated under the cathodic protection. This work conducted the simulation of the coating performance of these pipes using a FEM method. Thepipes, being ductile cast iron have been suffered under considerably high cathodic protection condition beyondthe appropriate condition. However, cathodic potential measured at the site revealed non-protected status. Converting from 3D CAD data of the power plant to appropriate type for a FEM simulation was conductedand cathodic potential under the applied voltage and current was calculated using primary and secondarycurrent distribution and physical conditions. FEM simulation for coal tar-coated pipe without defects revealedover-protection condition if the pipes were well-coated. However, the simulation for coal tar-coated pipeswith many defects predict that the coated pipes may be severely degraded. Therefore, for high risk pipes,direct examination and repair or renewal of pipes are strongly recommended.
Abstract
Coal tar-coated pipes buried in a domestic nuclear power plant have operated under the cathodic protection. This work conducted the simulation of the coating performance of these pipes using a FEM method. Thepipes, being ductile cast iron have been suffered under considerably high cathodic protection condition beyondthe appropriate condition. However, cathodic potential measured at the site revealed non-protected status. Converting from 3D CAD data of the power plant to appropriate type for a FEM simulation was conductedand cathodic potential under the applied voltage and current was calculated using primary and secondarycurrent distribution and physical conditions. FEM simulation for coal tar-coated pipe without defects revealedover-protection condition if the pipes were well-coated. However, the simulation for coal tar-coated pipeswith many defects predict that the coated pipes may be severely degraded. Therefore, for high risk pipes,direct examination and repair or renewal of pipes are strongly recommended.
참고문헌 (14)
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