Journal of Welding and Joining

  • 제31권6호
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  • Pages.1-7
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  • 2013
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  • 2466-2232(pISSN)
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  • 2466-2100(eISSN)
대한용접접합학회 (The Korean Welding and Joining Society)
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DOI QR코드

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원자력발전소 적용 고밀도 폴리에틸렌 배관의 맞대기 융착절차 및 검증절차 분석

Butt-fusing Procedures and Qualifications of High Density Polyethylene Pipe for Nuclear Power Plant Application

  • 오영진 (KEPCO E&C, 전력기술연구소, 재료기술연구그룹) ;
  • 박흥배 (KEPCO E&C, 전력기술연구소, 재료기술연구그룹) ;
  • 신호상 (한국원자력안전기술원, 고리주재검사팀)
  • Oh, Young-Jin (Structural Integrity & Materials Department, Power Engineering Research Institute, KEPCO Engineering & Construction Co. Inc.) ;
  • Park, Heung-Bae (Structural Integrity & Materials Department, Power Engineering Research Institute, KEPCO Engineering & Construction Co. Inc.) ;
  • Shin, Ho-Sang (Resident Inspector Office (Kori), Korea Institute of Nuclear Safety)
  • 투고 : 2013.12.18
  • 심사 : 2013.12.18
  • 발행 : 2013.12.31
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초록

In nuclear power plants, lined carbon steel pipes or PCCPs (pre-stressed concrete cylinder pipes) have been widely used for sea water transport systems. However, de-bonding of linings and oxidation of PCCP could make problems in aged NPPs (nuclear power plants). Recently at several NPPs in the United States, the PCCPs or lined carbon steel pipes of the sea water or raw water system have been replaced with HDPE (high density polyethylene) pipes, which have outstanding resistance to oxidation and seismic loading. ASME B&PV Code committee developed Code Case N-755, which describes rules for the construction of buried Safety Class 3 polyethylene pressure piping systems. Although US NRC permitted HDPE materials for Class 3 buried piping, their permission was limited to only 10-year operation because of several concerns including the quality of fusion zone of HDPE. In this study, various requirements for fusion qualification test of HDPE and some regulatory issues raised during HDPE application review in foreign NPPs are introduced.

키워드

참고문헌

  1. ASME, Code Case N-755, "Use of Polyethylene Plastic Pipe Sections, III, Division I and XI", 2007
  2. ASME, Code Case N-755-1, "Use of Polyethylene Plastic Pipe Sections, III, Division I and XI", 2011
  3. Plastic Pipe Institute, "Handbook of PE Pipe", 2nd Edition
  4. Eric Focht, "NRC Concerns Regarding the Use of HDPE Piping in Safety-Related Nuclear Applications", Use of HDPE for Power Plant Piping Systems Workshop, Charlotte, North Carolina, 2011
  5. D.J. Shim, P. Krishnaswamy and E. Focht, "Comparison of parent and butt fusion material properties of high density polyethylene", Proceedings of the ASME 2009 Pressure Vessels and Piping Division Conference, PVP2009-78066, 2009
  6. Steve Sandstrum, "HDPE Pipe - Connections", Use of HDPE for Power Plant Piping Systems Workshop, Charlotte, North Carolina, 2011
  7. Plastic Pipe Institute, TR-33, "Generic butt fusion joining procedure for field joining of polyethylene pipe", 2012
  8. International Standard, ISO 21307, second edition, corrected version, "Plastic pipes and fittings - Butt fusion jointing procedures for polyethylene(PE) pipes and fittings used in the construction of gas and water distribution systems", 2011
  9. Mike Troughton, "A comparison of mechanical test methods for butt fusion joints in polyethylene pipes", NACE northern area western conference, Calgary, Alberta, 2010
  10. S.H. Beech and M. Ritz, "Harmonisation of polyethylene pipe buttfusion procedures and test methods", Plastic pipes XIV Conference Budapest, Hungary, 2008
  11. S. Beech , J. Grieser, D. Lowe and P. Vanspeybroeck, "Harmonisation of polyethylene pipe buttfusion procedures and test methods", Plastic pipes XV Conference Vancouver, 2010
  12. S. Beech, C. Salles and U. Schulte, "Harmonisation of polyethylene pipe buttfusion procedures and test methods - Final conclusions", Plastic pipes XVI Conference Barcelona, 2012
  13. UK Water Industry, WIS 4-32-08, Issue 3, "Specification for the fusion joining of polyethylene pressure pipeline systems using PE80 and PE100 materials", 2002
  14. Britsh Standard, EN 12814-3:2000, "Testing of welded joints of thermoplastic semi-finished products-Part 3: Tensile creep test", 2000