Method of producing a cladding tube for reactor fuel

Details Method of producing a cladding tube for reactor fuel Method of producing a cladding tube for reactor fuel

C - Chemistry, Metallurgy

22

F

359/82, 148/35.7

C22F 1/18 (2006.01) C22C 28/00 (2006.01) G21C 3/07 (2006.01)

Patent

CA 1230805

ABSTRACT OF THE DISCLOSURE A method of producing cladding tube comprises a step of temperature-gradient annealing in which the inner surface of the tube is heated to a temperature higher than the recrystallization temperature thereof, while the outer surface of the tube is cooled, after the tube has been hot-extruded. The temperature-gradient annealing is effected while a temperature gradient is maintained between the inner surface and the outer surface of the cladding tube. While keeping the inner surface at a temperature higher than the recrystallization temperature, and the outer surface at a temperature lower than the recrystallization temperature. The cladding tube is obtained with the outer surface which has an excellent resistance to nodular corrosion and a soft inner surface which has an excellent resistance to stress corrosion cracking.

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