Nuclear fuel spacer grid

Details Nuclear fuel spacer grid Nuclear fuel spacer grid

1982-08-05

1984-10-02

Schafer, Richard E.

Induced nuclear reactions: processes, systems, and elements

Grids

376441, 376442, G21C 334

Patent

active

044747306

ABSTRACT:
A nuclear reactor fuel assembly spacer grid. The grid straps form an egg crate configuration creating standard cells to enclose the fuel rods. The standard cells have at least one of their straps with an integral spring portion extending into the standard cell and pushing against the fuel rod. A distinct backup spring is positioned transverse to and behind each of the spring portions of the straps and is positioned so as not to touch the fuel rods. The straps are made of a material having a low neutron capture cross-section while the backup spring is made of a material having good radiation stress relaxation properties.

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