Nuclear reactor fuel assembly spacer grid

Details Nuclear reactor fuel assembly spacer grid Nuclear reactor fuel assembly spacer grid

1983-01-03

1986-03-25

Jordan, Charles T.

Induced nuclear reactions: processes, systems, and elements

Fuel component structure

Plural fuel segments or elements

376442, G21C 334

Patent

active

045782407

ABSTRACT:
A nuclear reactor fuel assembly spacer grid having grid straps and a first type of spring clip. The grid straps define standard cells enclosing fuel rods and thimble cells enclosing control rod guide thimbles. The spring clip is bent to widthwise encircle a grid strap and has its two ends welded together. The first type of spring clip is used at a location on a grid strap having a standard cell and an adjacent thimble cell. The spring clip has a spring portion compressibly contacting the fuel rod in the standard cell. The spring clip also has a pair of separated flat portions straddling the control rod guide thimble in the thimble cell so as not to interfere with the guide thimble. The spring clip is made of a material having good radiation stress relaxation properties.

REFERENCES:
patent: 3380890 (1968-04-01), Glandin et al.
patent: 3431171 (1969-03-01), Glandin
patent: 3751335 (1973-08-01), Keith
patent: 3769159 (1973-10-01), Zinn et al.
patent: 4110160 (1978-08-01), Hayashi et al.
patent: 4163690 (1979-08-01), Jabsen
patent: 4175003 (1979-11-01), Beuchel et al.
patent: 4364902 (1982-12-01), Feutrel
patent: 4411862 (1983-10-01), Leclerq et al.

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