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Class Information
Number: 976/DIG.63
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] > Comprising fuel-elements of various compositions; comprising other pin-, rod-, or tube-like forms [g21c-3/32g] *** (elements influencing the coolant flow dig. 60)

Sub-classes under this class:

Class Number Class Name Patents
976/DIG.64 Special arrangements of elements in the assembly-lattice (e.g., fissile rods, fertile rods, water rods, poison rods, dummy-rods) [g21c-3/32g2] 48

Patents under this class:

Patent Number Title Of Patent Date Issued
4908180 Pressurized water nuclear reactor with a fuel rod containing a nuclear fuel column enriched to a variable extent over the length of the rod Mar. 13, 1990
RE33030 Self rupturing gas moderator rod for a nuclear reactor Aug. 22, 1989
4751039 Method of installing a sleeve within an instrumentation tube of a nuclear fuel assembly Jun. 14, 1988
4687621 Nuclear fuel assembly with improved spectral shift-producing rods Aug. 18, 1987
4687629 Fuel rod with annular nuclear fuel pellets having same U-235 enrichment and different annulus sizes for graduated enrichment loading Aug. 18, 1987
4684504 Bow resistant structural member for fuel assemblies in non-control rod locations of a nuclear reactor core Aug. 4, 1987
4666653 Fuel assembly with cooled guide tubes for a nuclear reactor May. 19, 1987
4664882 Segmented fuel and moderator rod May. 12, 1987
4652426 Water tubes arranged in cross-like pattern in a fuel assembly Mar. 24, 1987
4641409 Reconstituting a nuclear reactor fuel assembly Feb. 10, 1987
4632805 Fuel assembly with square cross section for water-cooled nuclear reactors Dec. 30, 1986
4625554 Device for tightening a nut on a fastening pin of a nuclear reactor guiding tube Dec. 2, 1986
4617170 Assembly for a core of a nuclear reactor Oct. 14, 1986
4599213 Nuclear fuel assembly with replaceable fuel elements Jul. 8, 1986
4587090 Fuel assembly for boiling water reactor May. 6, 1986
4587089 Fuel assembly for boiling water reactor May. 6, 1986
4576785 Reduction in rate of radiation exposure to excore nuclear reactor components Mar. 18, 1986
4534932 Apparatus for removing cladding material from bottom portion of control rod guide tube of nuclear reactor Aug. 13, 1985
4526745 Fuel assembly with a water flow separated from the fuel rods Jul. 2, 1985
4522782 Fuel assembly for a nuclear reactor Jun. 11, 1985
4493813 Neutron protection device Jan. 15, 1985
4492668 Apparatus and method for preventing the rotation of rods used in nuclear _fuel assemblies Jan. 8, 1985
4486384 Fuel assembly for a nuclear reactor Dec. 4, 1984
4448745 Lateral support for nuclear fuel assemblies May. 15, 1984
4420458 Nuclear fuel assembly with coolant conducting tube Dec. 13, 1983
4376092 Nuclear fuel assembly wear sleeve Mar. 8, 1983
4371495 Self rupturing gas moderator rod for a nuclear reactor Feb. 1, 1983
4358421 Industrial technique Nov. 9, 1982
4333798 Sleeve connection for reconstitutable control rod guide tube Jun. 8, 1982
4326921 Control rod guide thimble for nuclear reactor fuel assemblies Apr. 27, 1982
4326922 Composite nuclear fuel assembly Apr. 27, 1982
4323428 Reconstitutable fuel assembly for a nuclear reactor Apr. 6, 1982
4321111 Industrial technique Mar. 23, 1982
4313796 Guide post modification for nuclear fuel assembly Feb. 2, 1982
4304631 Control component retainer Dec. 8, 1981
4292132 Hydraulically centered control rod Sep. 29, 1981
4284475 Wear sleeve for control rod guide tube Aug. 18, 1981
4274921 Fuel assembly for fast nuclear reactors Jun. 23, 1981
4265708 Radially channeled guide post for a nuclear fuel assembly May. 5, 1981
4229259 Grid sleeve bulge tool Oct. 21, 1980
4208248 Fuel assembly with a removable end fitting Jun. 17, 1980
4155808 Nuclear fuel rod inspection structure May. 22, 1979
4096033 Core for a nuclear reactor Jun. 20, 1978
4078967 Holddown device for nuclear fuel assembly Mar. 14, 1978
4038132 Nuclear reactors Jul. 26, 1977
3998692 Nuclear reactor for breeding U.sup.233 Dec. 21, 1976
3997394 Fuel assembly supporting structure Dec. 14, 1976
3988203 Control assembly of a nuclear reactor Oct. 26, 1976
3971698 Nuclear reactors Jul. 27, 1976
3960655 Nuclear reactor for breeding U.sup.233 Jun. 1, 1976

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