Journal of the Korean Society of Safety (한국안전학회지)

The Korean Society of Safety (한국안전학회)
권호 표지

Failure Probability Evaluation of Pressure Tube using the Probabilistic Fracture Mechanics

확률론적 파괴역학 기법을 이용한 압력관의 파손확률 평가

  • Son, Jong-Dong (Department of Mechanical Engineering, Tong Myoung University) ;
  • Oh, Dong-Joon (Department of Mechanical Engineering Education, An-Dong National University)
  • 손종동 (동명대학교 기계공학과) ;
  • 오동준 (안동대학교 기계교육학과)
  • Published : 2007.08.31
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Abstract

In order to evaluate the integrity of Zr-2.5Nb pressure tubes, probabilistic fracture mechanics(PFM) approach was employed. Failure assessment diagram(FAD), plastic collapses, and critical crack lengths(CCL) were used for evaluating the failure probability as failure criteria. The Kr-FAD as failure assessment diagram was used because fracture of pressure tubes occurred in brittle manner due to hydrogen embrittlement of material by deuterium fluence. The probabilistic integrity evaluation observed AECL procedures and used fracture toughness parameters of EPRI and recently announced theory. In conclusion, the probabilistic approach using the Kr-FAD made it possible to determine major failure criterion in the pressure tube integrity evaluation.

Keywords

References

  1. Kwak, S. L., 'A Study on the Integrity Assessment of CANDU Pressure Tube Using Probabilistic Fracture Mechanics', Ph. D. Thesis, Department of Mech. Eng., Sung Kyun Kwan Univ., 1999
  2. 'Numerical recipes in C++', the art of scientific computing second edition, Cambridge Univ. Press
  3. Zahoor, A., 'Ductile Fracture Handbook', EPRI Report, Vol. 2-3, 1990
  4. Huang, W. L and Tan, J. Z., 'Failure Assessment Diagram(FAD) for I-II mixed-mode crack structures under biaxial loading', Int. J. Pres. Ves. & Piping, Vol. 69, pp. 53-58, 1995 https://doi.org/10.1016/0308-0161(95)00076-3
  5. Wang, B., Hu, N., Kurobane, Y., Makino, Y. and Lie, S. T., 'Damage Criterion and Safety Assessment Approach to Tubular Joint', Eng. Struct., Vol. 22, pp. 424-434, 2000 https://doi.org/10.1016/S0141-0296(98)00134-5
  6. KINS/HR-254, 'Development of Probabilistic Evaluation Methodology for Structural Integrity of Nuclear Components,' 1999