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Limit Loads for Circular Wall-Thinned Feeder Pipes Subjected to Bending and Internal Pressure.

원형 감육이 발생한 중수로 피더관의 한계하중 평가

  • Je, Jin-Ho (Dept. of Mechanical Engineering, Korea Univ.) ;
  • Lee, Kuk-Hee (Dept. of Mechanical Engineering, Korea Univ.) ;
  • Chung, Ha-Joo (Dept. of Mechanical Engineering, Korea Univ.) ;
  • Kim, Jong-Sung (Dept. of Mechanical Engineering, Sunchon Nat'l Univ.) ;
  • Kim, Yun-Jae (Dept. of Mechanical Engineering, Korea Univ.)
  • Received : 2010.06.07
  • Accepted : 2010.09.06
  • Published : 2010.11.01

Abstract

Flow Accelerated Corrosion (FAC) occurring during in-service conditions results in localized wall-thinning in the feeder pipes of CANDU. The wall-thinning of the feeder pipes is the main degradation mechanisms affecting the integrity of piping systems. In this paper, we assess the integrity of wall-thinned feeder pipes by limit load analysis. The limit loads for wall-thinning feeder pipes subjected to in-plane bending and internal pressure were determined on the basis of finte element limit analyses. The limit loads are determined from the results of limit analyses of elasticperfectly-plastic materials using the large geometry change. Closed-form approximations of limit load solutions for wall-thinning feeder pipes subjected to in-plane bending and pressure are proposed.

Keywords

CANDU;feeder pipe;limit load;circular wall-thinning;bending;internal pressure

Acknowledgement

Grant : 중수로 피더관 감육에 대한 구조 건전성 평가 연구

Supported by : 기초전력연구원

References

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  3. Slade, J. P. and Gendron, T. S., 2005, "Flow Accelerated Corrosion and Cracking of Carbon Steel Piping in Primary Water - Operating Experience at the Point LEPREAU Generating Station,” Proceedings of the 12th International Conference on Environmental Degradation of Materials in Nuclear Power System.
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Cited by

  1. Limit Loads for Circular Wall-Thinned Feeder Pipes Considering Bend Angle vol.36, pp.3, 2012, https://doi.org/10.3795/KSME-A.2012.36.3.313