Failure probability analysis and design comparison of multi-layered SiC-based fuel cladding in PWRs

Fracture Strength Determination Methods for Ceramic Materials Applied to Uranium Dioxide

“…[1,2]. Therefore, the true engineering barrier is the fuel cladding, which performs very well in LWR environments [3]. The extreme temperature gradients generated by fission energy and the low thermal conductivity of UO 2 quickly induce radial cracking in UO 2 during operation [4].…”

Transverse Rupture Strength of Uranium Dioxide

“…The doped UO2 samples were prepared using a 99.8% purity UO2 powder from International Bio-Analytical Industries, Inc. with an as received particle size of < 50 mesh (297 µm), as stated by the vendor. The powder reference density is 10.96 g/cm 3 . The two dopants used for the fabrication of these doped samples, Cr2O3 and TiO2 powders, were obtained from Alfa Aesar have a purity of 99.7% with particles sizes of <22 mesh (800 µm) and 15 nm, respectively, as stated by the vendor.…”

“…While the fuel pellet is technically the first engineering barrier for radionuclide release, pellet fracturing at intermediate-to highburnup values releases fission gases into the fuel rod plenum [1,2]. Therefore, the true engineering barrier is the fuel cladding, which performs very well in LWR environments [3]. The extreme temperature gradients generated by fission energy and the low thermal conductivity of UO2 quickly induce radial cracking in UO2 during operation [4].…”

Diagrams of statistical strength criterion for reinforced composite materials

“…An analytical approach with the help of numerical simulations based on the equivalent constraint model was proposed [4] to investigate the progressive failure behavior of symmetric fiber-reinforced composite laminates damaged by transverse ply cracking. A modified Weibull failure probability model that considers the impact of compressive stress on cladding failure probability is deduced in detail [5]. In study [6], reliability analysis of tensile strengths using Weibull distribution in glass/epoxy and carbon/epoxy composites is carried out.…”