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Class Information
Number: 976/DIG.71
Name: Nuclear technology > Reactor fuel elements and their assemblies; selection of substances for use as reactor fuel elements [g21c-3/00] > Assemblies of number of fuel elements in the form of a rigid unit [g21c-3/30] > Bundles of parallel pin-, rod-, or tube-shaped fuel elements [g21c-3/32] > Spacer grids; other spacer devices [g21c-3/34]
Description:










Sub-classes under this class:

Class Number Class Name Patents
976/DIG.72 Compact spacer grids (e.g., made of a plate or a blade) [g21c-3/34a] 4
976/DIG.81 Fabrication of spacer grids [g21c-3/34f] 33
976/DIG.80 Spacer grids formed by metallic wires (e.g., springs) [g21c-3/34e] 2
976/DIG.73 Spacer grids formed of assembled tubular elements [g21c-3/34b] 15
976/DIG.74 Spacer grids wherein each cell has a circular cross section; cells formed of assembled metallic nonintersecting strips [g21c-3/34c] 1
976/DIG.75 Spacer grids wherein each cell has a polygonal (e.g., square cross section) ; cells formed of assembled metallic nonintersecting strips [g21c-3/34d] 5


Patents under this class:

Patent Number Title Of Patent Date Issued
5104609 Assembly method for nuclear fuel assembly Apr. 14, 1992
5084237 Side insertable spacer Jan. 28, 1992
5024807 Debris catching spring detent spacer grid Jun. 18, 1991
5019333 Zirconium alloy for use in spacer grids for nuclear reactor fuel claddings May. 28, 1991
4942015 Method for preventing and repairing vibrational damage to nuclear fuel rods Jul. 17, 1990
4919883 Lower end fitting debris collector and end cap spacer grid Apr. 24, 1990
4859407 Nuclear reactor fuel assembly Aug. 22, 1989
4849161 Debris-resistant fuel assembly Jul. 18, 1989
4842814 Nuclear reactor fuel assembly Jun. 27, 1989
4784825 Method and apparatus for preventing and repairing vibrational damage to nuclear fuel rods Nov. 15, 1988
4765949 Spacing grid for nuclear fuel assembly Aug. 23, 1988
4705663 Nuclear reactor fuel element Nov. 10, 1987
4695426 Spacer for fuel rods Sep. 22, 1987
4683115 Nuclear reactor fuel assembly Jul. 28, 1987
4663117 Nuclear reactor fuel assemblies May. 5, 1987
4622204 Spacer grid for nuclear reactor fuel assembly Nov. 11, 1986
4416852 Multi-elevated nuclear reactor spacer grid Nov. 22, 1983
4411862 Spacer grating for fuel element in a nuclear reactor Oct. 25, 1983
4351795 Grids for nuclear fuel assemblies Sep. 28, 1982
4297171 Nuclear reactor fuel assembly Oct. 27, 1981
4294659 Apparatus for use in a liquid alkali metal environment Oct. 13, 1981
4259155 Fuel assembly for gas-cooled nuclear reactors Mar. 31, 1981
4177385 Nuclear fuel storage Dec. 4, 1979
3968008 Fissile element and a method for charging or recharging it Jul. 6, 1976











 
 
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