Mechanical analysis of surface-coated zircaloy cladding

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A structural model for stress distributions of coated Zircaloy subjected to realistic incore pressure difference, thermal expansion, irradiation-induced axial growth, and creep has been developed in this study. In normal operation, the structural integrity of coating layers is anticipated to be significantly challenged with increasing burnup. Strain mismatch between the zircaloy and the coated layer, due to their different irradiation-induced axial growth, and creep deformation are found to be the most dominant causes of stress. This study suggests that the compatibility of the high temperature irradiationinduced strains (axial growth and creep) between zircaloy and the coating layer and the capability to undergo plastic strain should be taken as key metrics, along with the traditional focus on chemical protectiveness. (C) 2017 Korean Nuclear Society, Published by Elsevier Korea LLC.
Publisher
KOREAN NUCLEAR SOC
Issue Date
2017-08
Language
English
Article Type
Article
Keywords

HIGH-TEMPERATURE OXIDATION; TIN-BASED COATINGS; SILICON-CARBIDE; CORROSION-RESISTANCE; CANDIDATE MATERIALS; SIC/SIC COMPOSITES; FUEL; ENVIRONMENTS; IRRADIATION; ALLOYS

Citation

NUCLEAR ENGINEERING AND TECHNOLOGY, v.49, no.5, pp.1031 - 1043

ISSN
1738-5733
DOI
10.1016/j.net.2017.03.012
URI
http://hdl.handle.net/10203/226461
Appears in Collection
NE-Journal Papers(저널논문)
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