Reliability Analysis Of Stainless Steel Piping Using A Single Stress Corrosion Cracking Damage Parameter
Résumé: This article presents the results of an investigation that combines standard methods of fracture mechanics,empirical correlations of stress-corrosion cracking, and probabilistic methods to provide an assessment of Intergranular Stress Corrosion Cracking (IGSCC) of stainless steel piping. This is done by simulating the cracking of stainless steel piping under IGSCC conditions using the general methodology recommended in the modified computer program Piping Reliability Analysis Including Seismic Events,and by characterizing IGSCC using a single damage parameter. Good correlation between the pipe endlife probability of leak and the damage values were found. These correlations were later used to generalize this probabilistic fracture model. Also, the probability of detection curves and the benefits of in-service inspection in order to reduce the probability of leak for nuclear piping systems subjected to IGSCC were discussed for several pipe sizes. It was found that greater benefits could be gained from inspections for the large pipe as compared to the small pipe sizes. Also, the results indicate that the use of a better inspection procedure can be more effective than a tenfold increase in the number of inspections of inferior quality. 2013 Elsevier Ltd. All rights reserved.
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