Inverted vane mixing grid

Details Inverted vane mixing grid Inverted vane mixing grid

1992-06-29

1993-11-23

Walsh, Donald P.

Induced nuclear reactions: processes, systems, and elements

Fuel component structure

Plural fuel segments or elements

376438, 376441, G21C 334

Patent

active

052651401

ABSTRACT:
A nuclear fuel assembly grid (1) has a plurality of flat strips (10,12) that are orthogonally interlaced along vertical slots (38,60) through their upper or lower edges and welded together to form an egg crate-like array of four-walled cells (14) for receiving respective fuel rods (16), each cell including springs (20,30) and arches (32,34) projecting from the walls for contacting and supporting a respective fuel rod in the interior of the cell. At least some of the cells having flow deflection vanes (36,56) projecting integrally from a cell wall into the interior of the cell without contacting the fuel rod. Preferably, the vane is bent along a bend line (52) that is parallel to the upper edge (24) of the strip, into the interior of the cell, thereby forming an angle of between about 15 degrees and 30 degrees relative to the plane defined by the body, or plate portion of the strip.

REFERENCES:
patent: 3764470 (1973-10-01), Calvin
patent: 3787286 (1974-01-01), Anthony
patent: 3809609 (1974-05-01), Krawiec et al.
patent: 3933584 (1976-01-01), Litt
patent: 4539738 (1985-09-01), Antol et al.
patent: 4844860 (1989-07-01), Hatfield
patent: 4879090 (1989-11-01), Perrotti et al.

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