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Class Information
Number: 976/DIG.59
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]

Sub-classes under this class:

Class Number Class Name Patents
976/DIG.68 Assembling the bundle; exchange of elements in the bundle [g21c-3/32l] 123
976/DIG.61 Coats and envelope surrounding the assembly [g21c-3/32c] 28
976/DIG.63 Comprising fuel-elements of various compositions; comprising other pin-, rod-, or tube-like forms [g21c-3/32g] *** (elements influencing the coolant flow dig. 60) 50
976/DIG.62 Made of moderator-material [g21c-3/32d] 0
976/DIG.67 Means for the storage or removal of fission gases [g21c-3/32k] *** (means for the storage of fission gases in the elements dig. 50; means for the removal of fission gases from elements dig. 39+) 9
976/DIG.60 Means to influence the coolant flow through or around the assembly [g21c-3/32b] *** (dig. 246 takes precedence) 83
976/DIG.69 Spacer elements [g21c-3/32m] *** (spacer grids dig. 71) 5
976/DIG.71 Spacer grids; other spacer devices [g21c-3/34] 24
976/DIG.65 Supporting or hanging the elements in the assembly [g21c-3/32h] *** (spacer grids dig. 71); means forming part of the assembly for inserting it into, or removing it from, the core; means for coupling adjacent assemblies (means forming part of the element for inserting it into, or removing it from, the core; or means for coupling adjacent elements dig. 49) 72

Patents under this class:
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Patent Number Title Of Patent Date Issued
5100611 Fuel assembly for a light-wafer nuclear reactor Mar. 31, 1992
5094802 Nuclear fuel assembly debris filter Mar. 10, 1992
5071617 Reduced flow resistance cast lower end fitting Dec. 10, 1991
5053191 Fuel assembly holddown spring Oct. 1, 1991
5037605 Nuclear fuel assembly debris filter Aug. 6, 1991
5037607 Reactor Aug. 6, 1991
5024806 Enhanced debris filter bottom nozzle for a nuclear fuel assembly Jun. 18, 1991
5009839 Nuclear fuel assembly bottom nozzle plate Apr. 23, 1991
4986960 Two piece end fitting with hairpin springs Jan. 22, 1991
4933137 Nuclear fuel assembly with means for retarding detector tube wear Jun. 12, 1990
4900507 Nuclear fuel assembly debris filter bottom nozzle Feb. 13, 1990
4895697 Top support lock Jan. 23, 1990
4844861 Fuel assembly for nuclear reactors Jul. 4, 1989
4842814 Nuclear reactor fuel assembly Jun. 27, 1989
4828791 Nuclear fuel assembly debris resistant bottom nozzle May. 9, 1989
4804516 Fuel assembly having anti-corrosion grids Feb. 14, 1989
4792429 Spring retention cap Dec. 20, 1988
4789518 Liquid-cooled nuclear reactor especially a boiling-water reactor Dec. 6, 1988
4781884 Debris catching strainer grid Nov. 1, 1988
4755351 Fuel assembly Jul. 5, 1988
4716015 Modular nuclear fuel assembly design Dec. 29, 1987
4684496 Debris trap for a pressurized water nuclear reactor Aug. 4, 1987
4684495 Fuel assembly bottom nozzle with integral debris trap Aug. 4, 1987
4671924 Hold-down device of fuel assembly top nozzle employing leaf springs Jun. 9, 1987
4655995 Reversible BWR fuel assembly and method of using same Apr. 7, 1987
4637915 Nuclear reactor fuel assembly and method of forming same Jan. 20, 1987
4632804 Fuel assembly for a boiling water reactor Dec. 30, 1986
4631167 Method for the production of a nuclear reactor assembly and assembly obtained by this method Dec. 23, 1986
4588550 Fuel assembly for a boiling water reactor May. 13, 1986
4587092 Nuclear reactor fuel assembly May. 6, 1986
4585614 Fuel assembly for nuclear reactor Apr. 29, 1986
4576786 Partial grid for a nuclear reactor fuel assembly Mar. 18, 1986
4572817 Plumb nozzle for nuclear fuel assembly Feb. 25, 1986
4551300 Nuclear reactor fuel assembly end fitting Nov. 5, 1985
4526741 Fuel assembly for the production of tritium in light water reactors Jul. 2, 1985
4526744 Fuel assembly for a boiling water reactor Jul. 2, 1985
4514358 Fuel assembly Apr. 30, 1985
4499047 Fuel assembly with a top plate arranged above the upper end surfaces of the fuel rods Feb. 12, 1985
4478786 Fuel assembly Oct. 23, 1984
RE31583 Fuel assembly hold-down device May. 8, 1984
4420457 Fuel assembly Dec. 13, 1983
4348355 Fuel assembly for a boiling nuclear reactor Sep. 7, 1982
4297776 Leaf spring puller for nuclear fuel rods Nov. 3, 1981
4235669 Nuclear reactor composite fuel assembly Nov. 25, 1980
4175318 Apparatus of assembling fuel rod bundle Nov. 27, 1979
4155807 Core and transition fuel assembly for a nuclear reactor May. 22, 1979
4119489 Method of using nuclear reactor fuel assembly Oct. 10, 1978
4056440 Heat transfer channels Nov. 1, 1977
3968008 Fissile element and a method for charging or recharging it Jul. 6, 1976
3964968 Nuclear reactor fuel assembly Jun. 22, 1976

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