Nuclear fuel rod with stress relieving device

Details Nuclear fuel rod with stress relieving device Nuclear fuel rod with stress relieving device

1976-05-26

1978-09-05

Nelson, Peter A.

176 79, G21C 302

Patent

active

041117484

ABSTRACT:
A nuclear fuel rod is made up of a stack of pellets of fuel material and a cladding or sheathing tube is provided. A metallic supporting structure is interposed between the pellet stack and an end plug of said cladding tube. The supporting structure can maintain the original shape under the normal operating reactor conditions, but when an excess stress is applied to the supporting structure, a mechanical break is produced in the supporting structure to reduce its supporting length, otherwise the excess stress would be exerted on said cladding tube in the vicinity of the end plug joints and might cause failure of the fuel rod.

REFERENCES:
patent: 3291698 (1966-12-01), Fortescue
patent: 3459636 (1959-08-01), Gernier
patent: 3644174 (1972-02-01), Ferrari
patent: 3647622 (1972-03-01), Andrews et al.
patent: 3647623 (1972-03-01), Hepps et al.
patent: 3671393 (1972-06-01), Williams
patent: 3759243 (1973-09-01), Masetti
patent: 3989590 (1976-11-01), Wehrli et al.

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