DOI QR코드

DOI QR Code

Spacer Grid Assembly with Sliding Fuel Rod Support

삽입 및 이동 가능한 연료봉 지지부의 지지격자 형상

  • Received : 2009.12.23
  • Accepted : 2010.05.05
  • Published : 2010.07.01

Abstract

A spacer grid assembly is one of the most important structural components of the nuclear fuel assembly of a Pressurized Water Reactor (PWR). A primary design requirement is that the fuel rod integrity be maintained by the spacer grid assembly during the operation of the reactor. In this study, we suggested a new spacer grid assembly having a fuel rod support, which is capable of sliding when the fuel rod vibrates due to flow-induced vibrations in the reactor. By adjusting the relative displacement between the fuel rod and its support, the proposed design will help in reducing fuel rod fretting damage.

Keywords

Sliding Fuel Rod Support;Nuclear Fuel Assembly;Spacer Grid Assembly;Fretting Wear;Flow-induced Vibration;Fuel Rod;Fuel Rod Support Integrity;PWR

Acknowledgement

Supported by : 한국원자력연구원

References

  1. Lynne E. Weiland and Beryl H. Parks, 1987, "Nuclear Reactor Spacer Grid," US Pat. 4,702,881.
  2. Claude Feutrel, 1980, "Space Grate For Fuel Elements of Nuclear Reactors," US Pat. 4,396,573.
  3. William J. Bryan, 1991, "Fuel Assembly Support Grid," US Pat. 5,139,736.
  4. Peter P. King, John F. Patterson, Jack Yates, and Charles A. Brown, 1986, "Grid Spacer and Method of Making Same," US Pat. 5,139,736.
  5. William J. Bryan, 1992, "Fuel Rod Capturing Grid Spring and Arch," US Pat. 5,243,635.
  6. John F. Patterson, Wayne A. VonOlnhausen, and Jack Yates, 1987, "Mixing grid," US Pat. 4,726,926.
  7. Kang, H. S., Song, K. N., Yoon, K. H., Jung, Y. H., Chun, T. H., Oh, D. S., In, W. K., and Bang, J. G., 1998, "Grid with Nozzle-Type Coolant Deflecting Channels for Use in Nuclear Reactor Fuel Assemblies," US Pat. 6,130,927.
  8. Yoon, K. H., Kang, H. S., Kim, H. K., Song, K. N., Jung, Y. H., Chun, T. H., Oh, D. S., In, W. K., and Park, G. J., 2004, "Spacer Grid for Nuclear Reactor Fuel Assemblies with Grid Springs Maintaining Conformal Contact with Fuel Rods and Enlaeged Elastic Range," UC Pat. 6,707,872 B2.
  9. Edmund E. DeMario, Raymond F. Boyle, and Pwter J. Kuchirka, 1987, "Nuclear Fuel Grid Spring and Dimple Structures," US Pat. 4,803,043.
  10. Yoon, K. H., Kim, H. K., Kang, H. S., and Song, K. N., 2001, "Shape Optimization of the H-Shape Spacer Grid Spring Structure," J. of Korean Nuclear Society, Vol. 33, No. 5, pp. 547-555.
  11. Song, K. N., Kang, B. S., Choi, S. K., Yoon, K.H., and Park, G. J., 2002, "Design of a NuclearFuel Rod Support Grid Using Axiomatic Design,"Trans. A of KSME, Vol. 26, No. 8, pp. 1623-1630.
  12. Song, K. N., Yoon, K. H., Kang, H. S., andLee, K. H., 2005, "Mechanical/Structural Tests ofRobust Spacer Grid Shapes for PWR Fuels," J. ofKorean Society of Pressure Vessel and Piping, Vol.1, No. 1, pp. 99-105.
  13. Song, K. N., Yoon, K. H., Kim, J. Y., and Lee,K. H., 2006, "Performance Evaluation of SpacerGrid Shapes Native to Korea for PWR Fuels," J. ofKorean Society of Pressure Vessel and Piping, Vol.2, No. 2, pp. 39-44.
  14. Lee, H. A., Kim, C. K., Song, K. N., and Park,G. J., 2007, "Design of a Nuclear Fuel Spacer GridConsidering Impact and Wear," Trans. A of KSME,Vol. 31, No. 10, pp. 1000-1009. https://doi.org/10.3795/KSME-A.2007.31.10.999
  15. Kim, D. W., Lee, H. A., Song, K. N., Kim, Y.I., and Park, G. J., 2007, "Nonlinear ResponseStructural Optimization of a Spacer Grid Spring fora Nuclear Fuel Rod Using the Equivalent Loads,"Trans. A of KSME, Vol. 31, No. 12, pp. 1165-1172. https://doi.org/10.3795/KSME-A.2007.31.12.1165
  16. Song, K. N., Lee, K. H., and Chung, I. S.,2008, "Comparison of Wear Resistance for VariousSpacer Grid Spring Shapes," J. of Korean Societyof Pressure Vessel and Piping, Vol. 4, No. 1, pp.1-7.
  17. Lee, S. B., Song, K. N., and Kim, Y. W., 2008,"Parametric Study for a Dimple Location in aSpacer Grid Under the Critical Impact Load," J. ofMechanical Science and Technology, Vol. 22, pp.2024-2029. https://doi.org/10.1007/s12206-008-0620-5
  18. Park, K. J., Kang, B. S., Song, K. N., and Park,G. J., 2003, "Design of a Spacer Grid UsingAxiomatic Design," J. of Nuclear Science andTechnology, Vol. 40, No. 12, pp. 989-997. https://doi.org/10.3327/jnst.40.989
  19. Lee, S. H., Song, K. N., and Kim, J. Y., 2007, "Design Improvement of an OPT-H Type NuclearFuel Rod Support Grid Using an Axiomatic Designand an Optimization," J. of Mechanical Science andTechnology, Vol. 21, pp. 1191-1195. https://doi.org/10.1007/BF03179035
  20. Song, K. N. and Kim, S. S., 2007, "Determinationof Optimum Welding Parameters for a LaserWelded Spacer Grid Assembly for PWRs," J. ofLaser Micro/Nanoengineering, Vol. 2, No. 1, pp. 95-99. https://doi.org/10.2961/jlmn.2007.01.0017
  21. Song, K. N., Lee, S. B., and Lee, S. H., 2007,"Performance Evaluation of New Spacer GridShapes for PWRs," Nuclear Engineering andTechnology, Vol. 39, No. 6, pp. 737-746. https://doi.org/10.5516/NET.2007.39.6.737
  22. Shin, M. K., Lee, H. A., Lee, J. J., Song, K.N., and Park, G. J., 2008, "Optimization of aNuclear Fuel Spacer Grid Spring Using HomologyConstraints," Nuclear Engineering and Design, Vol.238, pp. 2624-2634. https://doi.org/10.1016/j.nucengdes.2008.04.003
  23. Song, K. N. and Kim, S. S., Lee, S. H., andLee, S. B., 2009, "Laser Welding Unit forIntersection Line Welding of Spacer Grid InnerStraps and Its Application," Journal of LaserMicro/Nanoengineering, Vol. 4, No. 1, pp. 11-17. https://doi.org/10.2961/jlmn.2009.01.0003
  24. Kunz, H. J. and Song, K. N., 1987, Fuel Assembly Mechanical Design Manual, Siemens/KWU Work-Report U6 312/87/e326.
  25. Song, K. N., Korea Patent Application 2009-0006230.
  26. Song, K. N. and Lee, S. H., 2009, "SuggestionSpacer Grid Assembly With Sliding Fuel RodSupports," Proc. of KSME Fall Meeting,Yongpeong, Korea.
  27. Song, K. N., Korea Patent Application 2009-0068836.
  28. Song, K. N., Korea Patent Application 2009-0068839.
  29. Song, K. N., Korea Patent Application 2009-0068838.
  30. Song, K. N., Korea Patent Application 2009-0067020.
  31. Song, K. N., Korea Patent Application 2009-0006229.
  32. Song, K. N., Korea Patent Application 2009-0006228.
  33. ABAQUS/Standard Version 6.8 User's Manual,2009, H.K.S., USA.

Cited by

  1. Study on Characteristics of Sliding Support for Fuel Rod vol.35, pp.2, 2011, https://doi.org/10.3795/KSME-A.2011.35.2.201