Stress analysis and probabilistic assessment of multi-layer SiC-based accident tolerant nuclear fuel cladding

Characterization of SiC–SiC composites for accident tolerant fuel cladding

“…Alternately, an impermeable monolithic SiC layer can be deposited using chemical vapor deposition on the outside of a composite tube, resulting in an outer-monolith design [23].…”

“…Ongoing modeling efforts are exploring how to optimally position this monolithic layer to best accommodate expected stresses during reactor operation [11,23,31].…”

“…For a fuel cladding application, a thorough stress analysis considering pressurization as well as thermal gradient and irradiation-induced swelling effects must be performed. Stress results for different potential SiCbased accident tolerant fuel cladding designs have been analyzed, with results published elsewhere [23]. However, the C-ring and expanding plug test methods used here can still provide valuable basic strength information, to help evaluate all-composite structures and more complex multi-layered cladding designs.…”

Thermal shock resistance and hoop strength of triplex silicon carbide composite tubes

“…However, because the SiC composite has a low matrix density, it cannot effectively prevent the fission products from being released into the cooling water, and it has poor corrosion resistance to the coolant water. In this light, it is possible to prevent the release of fission products by applying a high density SiC, and to prevent corrosion of the composite …”

“…In this light, it is possible to prevent the release of fission products by applying a high density SiC, and to prevent corrosion of the composite. 8 Although the toughness of the multi-layered SiC composite cladding is increased due to the application of the composite layer, the toughness of the SiC composite cladding is still lower than that of the metal such as Zr alloys. It thus may fail due to an external impact such as thermal shock.…”