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http://dx.doi.org/10.3795/KSME-A.2002.26.4.653

Integrity Assessment of Sharp Flaw in CANDU Pressure Tube Using Probabilistic Fracture Mechanics  

Lee, Jun-Seong (Kyonggi University)
Gwak, Sang-Rok (Dept.of Mechanical Engineering, Graduate School of Sungkyunkwan University)
Kim, Yeong-Jin (Dept.of Mechanical Engineering, Sungkyunkwan University)
Park, Yun-Won (Korea Institute of Nuclear Safely)
Publication Information
Transactions of the Korean Society of Mechanical Engineers A / v.26, no.4, 2002 , pp. 653-659 More about this Journal
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.
Keywords
PFM; PDF; Monte Carlo Simulation; Failure Probability; Integrity Evaluation; Stress Intensity Factor; Fracture Toughness; Plastic Collapse;
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