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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

  • 장현영 (KEPCO E&C, 미래전력기술연구소) ;
  • 김기태 (안동대학교 신소재공학부, 청정에너지소재기술 연구센터) ;
  • 임부택 (KEPCO E&C, 미래전력기술연구소) ;
  • 김경수 (KEPCO E&C, 미래전력기술연구소) ;
  • 김재원 (KEPCO E&C, 미래전력기술연구소) ;
  • 박흥배 (KEPCO E&C, 미래전력기술연구소) ;
  • 김영식 (안동대학교 신소재공학부, 청정에너지소재기술 연구센터)
  • Chang, H.Y. (Power Engineering Research Institute, KEPCO Engineering & Construction Company) ;
  • Kim, K.T. (Materials Research Centre for Energy and Clean Technology, School of Materials Science and Engineering, Andong National University) ;
  • Lim, B.T. (Power Engineering Research Institute, KEPCO Engineering & Construction Company) ;
  • Kim, K.S. (Power Engineering Research Institute, KEPCO Engineering & Construction Company) ;
  • Kim, J.W. (Power Engineering Research Institute, KEPCO Engineering & Construction Company) ;
  • Park, H.B. (Power Engineering Research Institute, KEPCO Engineering & Construction Company) ;
  • Kim, Y.S. (Materials Research Centre for Energy and Clean Technology, School of Materials Science and Engineering, Andong National University)
  • 투고 : 2016.12.21
  • 심사 : 2017.06.20
  • 발행 : 2017.06.30

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. The pipes, being ductile cast iron have been suffered under considerably high cathodic protection condition beyond the 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 conducted and cathodic potential under the applied voltage and current was calculated using primary and secondary current distribution and physical conditions. FEM simulation for coal tar-coated pipe without defects revealed over-protection condition if the pipes were well-coated. However, the simulation for coal tar-coated pipes with 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.

키워드

참고문헌

  1. EPRI 1016456, Recommendations for an Effective Program to Control the Degradation of Buried and Underground Piping and Tanks, Revision 1 (2010).
  2. KISTEK, Development of corrosion environment survey and analysis method for buried pipe (II) (1999).
  3. KOGAS, Protection technique handbook, p. 18 (2003).
  4. EPRI 1022962, Plant Engineering: Evaluation of Indirect Assessment Techniques for Coating Flaw Detection, (2011).
  5. NUREG-1801, Generic Aging Lessons Learned (GALL) Report, Revision 2, USNRC, Dec. (2010).
  6. License Renewal Interim Staff Guidance, Changes to Buried and Underground Piping and Tank Recommendations, LR-ISG-2015-01, USNRC (2015).
  7. B. Allik, U.S. NRC Update on Buried and Underground Piping and Tanks, BPIG-CPUG Meeting, EPRI, July (2016).
  8. W. C. Holston, Changes to Buried and Underground Piping and Tank Recommendations, BPIG Meeting, EPRI, July (2015).
  9. Act No. 13616, Nuclear Safety Act, Article 20 and 21, Periodic Safety review (2017).
  10. ML16041A090, Selective Leaching of Ductile Iron for GALL-SLR(Generic Aging Lessons Learned-Subsequent License Renewal), USNRC (2015).
  11. K. T. Kim, H. W. Kim, Y. S. Kim, H. Y. Chang, B. T. Lim, H. B. Park, Corros. Sci. Tech., 14, 12 (2015). https://doi.org/10.14773/cst.2015.14.1.12
  12. H. Y. Chang, H. B. Park, K. T. Kim, Y. S. Kim, Y. Y. Jang, KPVP, 11, 61 (2015).
  13. $COMSOL^{TM}$, Guidebook of $COMSOL^{TM}$ Multiphysics (Chemistry-Electrochemistry), ALTSOFT (2014).
  14. M. Tabatabaian, $COMSOL^{TM}$ for Engineers, Mercury Learning and Information (2014).