Affiliation:
1. Chungbuk National University
2. Korea Electric Power Research Institute
Abstract
A statistical assessment model for structural integrity of steam generator tubes with axial
cracks at the top of the tubesheet was proposed using Monte Carlo method. In the model, a method
for estimating the number of "real cracks" from in-situ inspection (ISI) data was used. Based on the
estimated "real cracks", the number of newly detected cracks and growth of cracks during arbitrary
operating period were simulated using the Monte Carlo method. The flaw growth rate used in the
simulation was statistically calculated from the periodic in-service non-destructive inspection data.
The number of cracks, the probabilistic distribution of crack sizes at the end of next operating
interval and the probability of burst during operation were calculated from numerously repeated
simulations using the proposed model.
Publisher
Trans Tech Publications, Ltd.
Subject
Mechanical Engineering,Mechanics of Materials,General Materials Science
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