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

The Korean Society of Mechanical Engineers (대한기계학회)
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Integrity Assessment of Sharp Flaw in CANDU Pressure Tube Using Probabilistic Fracture Mechanics

확률론적 파괴역학을 도입한 CANDU 압력관의 예리한 결함에 대한 건전성평가

  • 이준성 (경기대학교 전자기계공학부) ;
  • 곽상록 (성균관대학교 대학원 기계공학과) ;
  • 김영진 (성균관대학교 기계공학부) ;
  • 박윤원 (한국원자력안전기술원)
  • Published : 2002.04.01
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Abstract

This paper describes a probabilistic fracture mechanics(PFM) analysis based on Monte Carlo(MC) simulation. In the analysis of CANDU pressure tube, the depth and aspect ratio of an initial semi-elliptical surface crack, a fracture toughness value and delayed hydride cracking(DHC) velocity are assumed to be probabilistic variables. As an example, some failure probabilities of piping and CANDU pressure tube are calculated using MC method with the stratified sampling MC technique, taking analysis conditions of normal operations. In the stratified MC simulation, a sampling space of probabilistic variables is divided into a number of small cells. For the verification of analysis results, a comparison study of the PFM analysis using other commercial code is carried out and a good agreement was observed between those results.

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References

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