Patent ID: 8882939

Claim:
A boiling water nuclear reactor fuel assembly, comprising: components comprising a zirconium alloy that is resistant to shadow corrosion for a boiling water nuclear reactor fuel assembly component, the alloy having a composition in percentages by weight comprising: Nb=0.4% -4.5%; Sn=0.20% -1.7%; Fe=0.05% -0.45%; Fe+Cr+Ni+V=0.05% -0.45%, with Nb9 ×[0.5−(Fe+Cr+V+Ni)]; S=traces -400 ppm; C=traces -200 ppm; Si=traces -120 ppm; O=600 ppm -1800 ppm; and the balance being Zr and impurities from processing; wherein, during fabrication, after the alloy's last hot deformation, the alloy is subjected to one or more heat treatments at a temperature lying in the range 450° C. to 610° C. for a total duration of at least 4 hours, with at least one cold rolling operation with a rolling ratio of at least 25%, no heat treatment subsequent to the hot deformation exceeding 610° C.; and wherein a final heat treatment operation is performed at a temperature lying in the range 450° C. to 610° C. for a duration lying in the range 1 minute to 20 hours; and wherein at least some of the components are placed in galvanic coupling conditions with other components made of alloy based on Ni or on stainless steel.