Nuclear reactor fuel assembly

Details Nuclear reactor fuel assembly Nuclear reactor fuel assembly

G - Physics

21

C

359/78

G21C 3/32 (2006.01) G21C 3/30 (2006.01) G21C 3/34 (2006.01)

Patent

CA 1272307

Abstract: In a nuclear reactor fuel assembly a channel box and/or a spacer of the fuel assembly is of welded con- struction and is made of a Zr-Nb-Sn alloy comprising 0.5-2.2 wt% Nb, 0.5-1.5wt% Sn and balance Zr, such as to satisfy the relation Sn(wt%) 22 x Nb(wt%) - 3.0, or a Zr-Nb-Sn-Mo alloy comprising 0.5-2.2 wt% Nb, 0.5-1.5 wt% Sn and balance Zr, such as to satisfy the relation Sn (wt%)?2 x Nb(wt%) - 0.3, o.1-0.8 wt% Mo. The welded portion, its heat affected zone and the unwelded portion of the channel box and/or the spacer have substantially a whole equilibrium phase structure with resultant improved corrosion resistance.

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