Fuel rod for nuclear reactor

Details Fuel rod for nuclear reactor Fuel rod for nuclear reactor

1992-06-30

1994-05-03

Walsh, Donald P.

Induced nuclear reactions: processes, systems, and elements

Fuel component structure

Plural fuel segments or elements

376419, 376426, G21C 330

Patent

active

053094930

ABSTRACT:
A fuel rod for nuclear reactors which contains UO.sub.2 or a mixed-oxide (MOX) of UO.sub.2 and PuO.sub.2 as a nuclear fuel and a combustible reactivity control material e.g., Gd.sub.2 O.sub.3. A plurality of hollow UO.sub.2 or MOX pellets each having a hole along its central axis are spitted with a long bar of Gd.sub.2 O.sub.3 to form a pellet stack, which is inserted and sealed in a cladding tube to form the fuel rod of the present invention. Since the Gd.sub.2 O.sub.3 bar can be manufactured in a non-nuclear fuel manufacturing facility, it is not required to provide two separate lines, i.e., a line for handling Gd.sub.2 O.sub.3 and a line for handling UO.sub.2 or MOX fuel, in one manufacturing facility. The optimum design for the performance of the nuclear fuel is possible by changing the diameter and/or Gd.sub.2 O.sub.3 concentration of the Gd.sub.2 O.sub.3 bar depending on the desired performance of the nuclear fuel.

REFERENCES:
patent: 3953286 (1976-04-01), Watson et al.
patent: 4273616 (1981-06-01), Andrews
patent: 4393510 (1983-07-01), Lang et al.
patent: 4493814 (1985-01-01), Beard, Jr. et al.
patent: 4826630 (1989-05-01), Radford et al.
patent: 4832906 (1989-05-01), Aoyama et al.
patent: 4853177 (1989-08-01), Pettus

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