Nuclear reactor seismic fuel assembly grid

Details Nuclear reactor seismic fuel assembly grid Nuclear reactor seismic fuel assembly grid

1975-12-05

1977-11-15

Bentley, Stephen C.

176 76, G21C 330

Patent

active

040584364

ABSTRACT:
The strength of a nuclear reactor fuel assembly is enhanced by increasing the crush strength of the zircaloy spacer grids which locate and support the fuel elements in the fuel assembly. Increased resistance to deformation as a result of laterally directed forces is achieved by increasing the section modulus of the perimeter strip through bending the upper and lower edges thereof inwardly. The perimeter strip is further rigidized by forming, in the central portion thereof, dimples which extend inwardly with respect to the fuel assembly. The integrity of the spacer grid may also be enhanced by providing back-up arches for some or all of the integral fuel element locating springs and the strength of the fuel assembly may be further enhanced by providing, intermediate its ends, a steel seismic grid.

REFERENCES:
patent: 3442763 (1969-05-01), Chetter
patent: 3607640 (1971-09-01), Krawiec
patent: 3664924 (1972-05-01), Krawiec
patent: 3674637 (1972-07-01), Delafosse
patent: 3679547 (1972-07-01), Warberg
patent: 3715275 (1973-02-01), Krawiec
patent: 3753855 (1973-08-01), Donck
patent: 3920515 (1975-11-01), Ferrari

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