Assessment of Steam Generator Tubes with Dual Axial Through-Wall Cracks |
| Journal |
Solid State Phenomena (Volume 120) |
| Volume |
Safety and Structural Integrity 2006 |
| Edited by |
Young-Jin Kim |
| Pages |
71-76 |
| DOI |
10.4028/www.scientific.net/SSP.120.71 |
| Online since |
February, 2007 |
| Authors |
Yoon Suk Chang,
Seong In Moon,
Young Jin Kim,
Jin Ho Lee,
Myung Ho Song,
Young Hwan Choi
|
| Keywords |
Collinear Cracks, Failure Prediction Model, Parallel Cracks, Plastic Collapse, Plugging Criteria, Steam Generator Tubes, Thin Plate |
| Abstract |
In this paper, conservatisms of current plugging criteria on steam generator tubes are
reviewed and six new failure prediction models for dual through-wall cracks are proposed. In order to
determine the optimum ones among these local or global failure prediction models, a series of plastic
collapse tests and corresponding finite element analyses are carried out with respect to two adjacent
axial through-wall cracks in thin plates. Then, reaction force model, plastic zone contact model and
COD (Crack Opening Displacement) base model were selected as the optimum ones for integrity
assessment of steam generator tubes with dual cracks. |
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