Nuclear fuel element having a composite coating

Details Nuclear fuel element having a composite coating Nuclear fuel element having a composite coating

G - Physics

21

C

359/82

G21C 3/20 (2006.01)

Patent

CA 1114077

Abstract of the Disclosure A nuclear fuel element consisting of a zirconium or ziroonium alloy container and nuclear fuel pellets is provided for use in the core of a nuclear reactor. The zirconium or zirconium alloy container has an inner coating of copper in proximity to the nuclear fuel, and is separated from the zir- conium or zirconium alloy by an intermediate zirconium oxide diffusion barrier layer. The copper layer and the intermediate zirconium oxide diffusion barrier of the composite cladding reduce perforations or failure in the zirconium or zirconium alloy cladding substrate caused by stress corrosion cracking or metal embrittlement. Good bonding of the copper to the oxided zirconium and zirconium alloy prevents scaling of copper from the composite cladding during the loading of the fuel element with fuel pellets.

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