Design optimization of multi-layer Silicon Carbide cladding for light water reactors

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A parametric study that demonstrates a methodology for determining the optimum bilayer composition in a duplex SiC cladding is discussed. The structural performance of multi-layer SiC cladding design is significantly affected by radial thickness fraction of each layer. This study shows that there exists an optimal composite/monolith radial thickness fraction that minimizes failure probability for a duplex SiC cladding in steady-state operation. An exemplary reference case study shows that the duplex cladding with the inner composite fraction similar to 0.4 and the outer CVD-SiC fraction similar to 0.6 is found to be the optimal SiC cladding design for the current PWRs with the reference material choice for CVD-SiC and fiber reinforced composite. A marginal increase in the composite fraction from the presented optimal designs may lead to increase structural integrity by introducing some unquantified merits such as increasing damage tolerance. The major factors that affect the optimum cladding designs are temperature gradients and internal gas pressure. Clad wall thickness, thermal conductivity, and Weibull modulus are among the key design parameters/material properties. (C) 2016 Elsevier B.V. All rights reserved.
Publisher
ELSEVIER SCIENCE SA
Issue Date
2017-01
Language
English
Article Type
Article
Keywords

SIC/SIC COMPOSITES; OXIDATION BEHAVIOR; FUEL; IRRADIATION; STEAM; FIBER

Citation

NUCLEAR ENGINEERING AND DESIGN, v.311, pp.213 - 223

ISSN
0029-5493
DOI
10.1016/j.nucengdes.2016.11.016
URI
http://hdl.handle.net/10203/220898
Appears in Collection
NE-Journal Papers(저널논문)
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