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Limit Loads for Circular Wall-Thinned Feeder Pipes Considering Bend Angle

굽힘각도를 고려한 원형 감육이 발생한 중수로 피더관의 한계하중

  • 배경동 (고려대학교 기계공학과) ;
  • 제진호 (고려대학교 기계공학과) ;
  • 김종성 (국립순천대학교 기계우주항공공학부) ;
  • 김윤재 (고려대학교 기계공학과)
  • Received : 2011.12.06
  • Accepted : 2012.01.11
  • Published : 2012.03.01

Abstract

In CANDU, feeder pipes supply heavy water to pressure tube and steam generator. Under service conditions, Flow-Accelerated Corrosion (FAC) produces local wall-thinning in the feeder pipes. The wall-thinning in these pipes affects the integrity of the piping system, as verified in previous research. This paper provides limit loads for wallthinned feeder pipes with $45^{\circ}$ and $60^{\circ}$ bend angles, and proposes an equation that predicts the limit loads for wallthinned feeder pipes with arbitrary bend angles. On the basis of finite element limit analyses, limit loads are obtained for wall-thinned feeder pipes under in-plane bending and internal pressure. There are two cases of in-plane bending: the in-plane closing direction and the in-plane opening direction. The material is considered the effect of the large deformation, so an elastic-perfectly-plastic material is assumed in the calculations.

Acknowledgement

Grant : 중수로 피더관 감육에 대한 구조 건전성 평가 연구

Supported by : 기초전력연구원

References

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