Cladding tube for nuclear fuel and nuclear fuel element having t

Details Cladding tube for nuclear fuel and nuclear fuel element having t Cladding tube for nuclear fuel and nuclear fuel element having t

1987-06-12

1989-09-05

Maples, John S.

Induced nuclear reactions: processes, systems, and elements

Fuel component structure

Encased with nonfuel component

376416, 376457, 420422, G21C 320, G21C 306

Patent

active

048636797

ABSTRACT:
Disclosed are a cladding tube for a nuclear fuel and a nuclear fuel element incorporating the cladding tube. The cladding tube consists of an inner zirconium liner layer and an outer zirconium alloy layer. The cladding tube has at least one of the following features: (I) the ratio a/b of the oxygen content a to iron content b in the zirconium liner layer is greater than 1.0, (II) the zirconium liner layer is made of a zirconium into the matrix of which impurities are dissolved, and (III) the second phase particles having microscopic sizes and dispersed in the inner surface of the zirconium liner layer and/or the outer surface of the zirconium alloy layer have been removed substantially. Owing to these features, undesirable stress corrosion cracking and local corrosion are remarkably suppressed in the cladding tube and the nuclear fuel element of the invention.

REFERENCES:
patent: 3957507 (1976-05-01), Blumenthal
patent: 4000013 (1976-12-01), MacEwen et al.
patent: 4200492 (1980-04-01), Armijo et al.
patent: 4238251 (1980-12-01), Williams et al.
patent: 4284660 (1981-08-01), Donaghy et al.
patent: 4343659 (1982-08-01), Murakami et al.
patent: 4659540 (1987-04-01), Cheng et al.

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