대한기계학회논문집A (Transactions of the Korean Society of Mechanical Engineers A)

대한기계학회 (The Korean Society of Mechanical Engineers)
권호 표지
DOI QR코드

DOI QR Code

동종금속용접이 이종금속용접부 잔류응력에 미치는 영향 평가 시 안전단 길이에 따른 효과

Effects of Similar Metal Weld on Residual Stress in Dissimilar Metal Weld According to Safe End Length

  • 발행 : 2009.07.01

초록

Nozzle in nuclear power plant is connected to pipe using safe end. Dissimilar metal weld between nozzle and safe end is followed by similar metal weld between safe end and pipe. And thus residual stress in dissimilar metal weld can be affected by similar metal weld. Similar metal weld impose bending stress on dissimilar metal weld, which is according to the length of safe end. In this study, simple nozzle model which covers various radius to thickness ratios was proposed to quantify residual stress in dissimilar metal weld based on finite element analyses. As a result, short length of safe end was proved to be more effective to mitigate residual stress in dissimilar metal weld and critical effective length of safe end is provided according to the radius to thickness ratio.

키워드

파일

원문 PDF 다운로드

참고문헌

  1. British Energy Generation Ltd., 2007, 'R6:Assessment of the Integrity of Structures Containing Defects,' Rivision 4
  2. American Society of Mechanical Engineers, 2007, 'API-579-1/ASME FFS-1. Fitness-for-service.'
  3. Yaghi, A., Gyde, T. H., Becker, A. A., Sun, W., Williams, J. A., 2006, 'Residual Stress Simulation in Thin and Thick-Walled Stainless Steel Pipe Welds Including Pipe Diameter Effects,' International Journal of Pressure Vessels and Piping, Vol. 83, pp. 864-874 https://doi.org/10.1016/j.ijpvp.2006.08.014
  4. Brickstad, B., Josefson, B. L., 1998, 'A Parametric Study of Residual Stresses in Multi-Pass Butt-Welded Stainless Steel Pipes,' International Journal of Pressure Vessels and piping, Vol. 75, pp.11-25 https://doi.org/10.1016/S0308-0161(97)00117-8
  5. Abel, J.S, Titrington, J., Jordan, R., Porowski, J. S., O'Donnell, W. J., Badlani, M. L., Hampton, E. J., 1988, 'Mechanical Methods of Improving Resistance to Stress Corrosion Cracking in BWR Piping Systems,' Int. J. Pres. Ves. and piping, Vol.34, pp.17-29 https://doi.org/10.1016/0308-0161(88)90039-7
  6. Edwards, N. W., 1986, 'Weld Overlay of BWR Flawed Piping,' Int. J. Pres. Ves. & Piping, Vol 25, pp.17-24 https://doi.org/10.1016/0308-0161(86)90090-6
  7. Material Reliability Program : Welding Residual and Operating Stresses in PWR Alloy 182 Butt Welds (MRP-106), EPRI, Palo Alto, CA:2004. 1009378
  8. Limpus, C.R., Dijamco, D. G., Bax R, Cofie, Nathaniel G., 2007, 'Effect of Size of Butt Weld Repaires on Weld Overlay Residual Stresses,' Trans. of ASME PVP conference, PVP2007-26636
  9. Brust, F. W., Scott, P. M., 2007, 'Weld Residual Stresses and Primary Water Stress Corrosion Cracking in Bimetal Nuclear Pipe Welds,' Trans. of ASME PVP conference, PVP2007-26636
  10. Courtin, S., Gilles, P., 2006, 'Detailed Simulation of an Overlay Repair on a 14" Dissimilar Material Weld,' Trans. of ASME PVP conference, PVP2006-ICPVT-11- 93823
  11. Song,T.K., Bae,H.Y., Kim, Y.J., Lee, K.S., Park, C.Y., 2008, 'Sensitivity Analyses of Finite Element Method for Estimating Residual Stress of Dissimilar Metal Multi-Pass Welding,' Trans. of the KSME(A) , Vol.32, No. 9, pp.770-781 https://doi.org/10.3795/KSME-A.2008.32.9.770
  12. White, G., Broussard, J., Collin, J., Klug, M., Harrington, C. and DeBoo, G., 2008, 'Advanced FEA Modeling of PWSCC Crack Growth in PWR Dissimilar Metal Piping Butt Welds and Application to the Industry Inspection and Mitigation Program,' Trans. of ASME PVP conference, PVP2008-61616
  13. Rudland, D., Zhang, T., Wilkowski, G. and Csontos, A., 2008, 'Welding Residual Stress Solutions for Dissimilar Metal Surge Line Nozzles Welds,' Trans. of ASME PVP conference, PVP2008-61285
  14. Song, T. K., Bae, H. Y., Chun, Y. B., Oh, C. Y., Kim, Y. J., Lee, K. S., Park, C. Y., 2008, 'Estimation of Residual Stress Distribution for Pressurizer Nozzle of Kori Nuclear Power Plant Considering Safe End,' Trans. of the KSME(A), Vol.32, No. 8, pp. 668-677 https://doi.org/10.3795/KSME-A.2008.32.8.668
  15. ABAQUS, 2007, 'ABAQUS Standard/User's Manual, Version 6.7,' ABAQUS, Inc
  16. Nadri, B., Bouchard, P. J., Truman, C. E. and Smith, D. J., 2007, Trans. of ASME PVP Conference, PVP2007-26265
  17. Dennis, R. J., Leggatt, N. A. and Gregg, A., 2008, 'Optimization of Weld Modeling Techniques-Bead-on-Plate Analysis,' Trans. of ASME PVP Conference, PVP2006-ICPVT-11-93907
  18. ASME, 2004, 'Materials,' ASME Boiler and Pressure Vessel Code, Sec. II, Part D-properties
  19. Special Metals Corporation, 2007, 'Inconel 600 Information,' www.specialmetals.com
  20. Elocate, C.D., Dennis, R.J., Bouchard, P.J., Smith, M.C., 2005, 'Three Dimensional Multi-Pass Repair Weld Simulations,' International Journal of Pressure Vessels and Piping, Vol. 82, pp. 244-257 https://doi.org/10.1016/j.ijpvp.2004.08.003
  21. Material Reliability Program: Advanced FEA Evaluation of Growth of Postulated Circumferential PWSCC Flaws in Pressurizer Nozzle Dissimilar Metal Welds (MRP-216, Rev. 1), Evaluations Specific to Nine Subject Plants., EPRI, Palo Alto, CA:2007. 1015400
  22. Martin, C., Bamford, W. and Palm, N., 2008, 'Manufacturing Methodology, Repair History, and Loadings for Westinghouse and Combustion Engineering Pressurizers, to Support Detailed Structural Integrity Evaluations of the Nozzle Safe End Configurations,' Trans. of ASME PVP Conference, PVP2008-61843
  23. U.S. Nuclear Regulatory Commission, 1992, 'Technical Report on Material Selection and Processing Guidelines for BWR Coolant Pressure Boundary Piping-Final Report,' NUREG-0313, Revision 2
  24. Bamford, W., Newton, B. Seeger, D., 2006, 'Recent Experience with Weld Overlay Repair of Indications in Alloy 182 Butt Welds in Two Operating PWRs,' Trans. of ASME PVP conference, PVP2006-ICPVT-11-93891
  25. Muroya, I., Iwamoto, Y., Ogawa, N., Hojo, K., Ogawa, K., 2008, 'Residual Stress Evaluation of Dissimilar Weld Joint Using Reactor Vessel Outlet Nozzle Mock-up Model (report-1),' Trans. of ASME PVP conference, PVP2008-61829
  26. Dong, P., 2001, 'Residual Stress Analyses of a Multi-Pass Girth Weld: 3-D Special Shell Versus Axisymmetric Models,' ASME Journal of Pressure Vessel Technology, Vol.123, pp.207-213 https://doi.org/10.1115/1.1359527

피인용 문헌

  1. Stress Distribution in the Dissimilar Metal Butt Weld of Nuclear Reactor Piping due to the Simulation Technique for the Repair Welding vol.37, pp.5, 2013, https://doi.org/10.3795/KSME-A.2013.37.5.649
  2. Investigation into Variations of Welding Residual Stresses and Redistribution Behaviors for Different Repair Welding Widths vol.38, pp.2, 2014, https://doi.org/10.3795/KSME-A.2014.38.2.177
  3. Effects of Repair Weld of Reactor Pressure Vessel Upper Head Control Rod Drive Mechanism Penetration Nozzle on J-Groove Weldment Using Finite Element Analysis vol.38, pp.6, 2014, https://doi.org/10.3795/KSME-A.2014.38.6.637
  4. Stress Distributions at the Dissimilar Metal Weld of Safety Injection Nozzles According to Safe-end Length and SMW Thickness vol.39, pp.10, 2015, https://doi.org/10.3795/KSME-A.2015.39.10.979
  5. Effects of Geometry of Reactor Pressure Vessel Upper Head Control Rod Drive Mechanism Penetration Nozzles on J-Groove Weld Residual Stress vol.35, pp.10, 2011, https://doi.org/10.3795/KSME-A.2011.35.10.1337
  6. Sensitivity Analysis of Finite Element Parameters for Estimating Residual Stress of J-Groove Weld in RPV CRDM Penetration Nozzle vol.36, pp.10, 2012, https://doi.org/10.3795/KSME-A.2012.36.10.1115
  7. Crack Growth Analysis due to PWSCC in Dissimilar Metal Butt Weld for Reactor Piping Considering Hydrostatic and Normal Operating Conditions vol.37, pp.1, 2013, https://doi.org/10.3795/KSME-A.2013.37.1.047