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Class Information
Number: 976/DIG.65
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] > 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)
Description:










Sub-classes under this class:

Class Number Class Name Patents
976/DIG.66 Supports for spacer grids [g21c-3/32h2] 20


Patents under this class:
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Patent Number Title Of Patent Date Issued
4914679 Fuel assembly Apr. 3, 1990
4861545 Nuclear reactor fuel assembly Aug. 29, 1989
4859408 Method and apparatus for securing structural tubes in nuclear reactor fuel assemblies Aug. 22, 1989
4851187 Nuclear reactor fuel assembly Jul. 25, 1989
4828792 Nuclear fuel assembly with holding structure and hold down device May. 9, 1989
4814138 Method for repairing a nuclear reactor fuel assembly and a replacement rod for performing the method Mar. 21, 1989
4792428 Nuclear fuel assembly with a free end grid Dec. 20, 1988
4784825 Method and apparatus for preventing and repairing vibrational damage to nuclear fuel rods Nov. 15, 1988
4776198 Method and apparatus for securing structural tubes in nuclear reactor fuel assemblies Oct. 11, 1988
4744942 Nuclear reactor spacer grid loading May. 17, 1988
4740351 Method of and arrangement for protecting nuclear fuel assembly Apr. 26, 1988
4740350 BWR fuel assembly having fuel rod spacers axially positioned by exterior springs Apr. 26, 1988
4716017 Apparatus for securing structural tubes in nuclear reactor fuel assemblies Dec. 29, 1987
4707328 Fuel assembly for a nuclear reactor Nov. 17, 1987
4705663 Nuclear reactor fuel element Nov. 10, 1987
4702880 Process for improving resistance of split pins to stress corrosion cracking Oct. 27, 1987
4687619 Removable top nozzle and tool for a nuclear reactor fuel assembly Aug. 18, 1987
4684499 Burnable absorber rod releasable latching structure Aug. 4, 1987
4684501 Compliant inserts mounted in upper tie plate of BWR fuel assembly Aug. 4, 1987
4683115 Nuclear reactor fuel assembly Jul. 28, 1987
4683117 Nuclear fuel assembly incorporating primary and secondary structural support members Jul. 28, 1987
4678618 Individual source positioning mechanism for a nuclear reactor fuel assembly Jul. 7, 1987
4678630 Spacer grid insert Jul. 7, 1987
4673545 Remotely controlled apparatus for removing clips from irradiated nuclear fuel assemblies Jun. 16, 1987
4663119 Method and apparatus for securing structural tubes in nuclear reactor fuel assemblies May. 5, 1987
4657733 Fuel assembly for a nuclear reactor Apr. 14, 1987
4655995 Reversible BWR fuel assembly and method of using same Apr. 7, 1987
4655990 Fuel assemblies for nuclear reactors Apr. 7, 1987
4645642 Hold down device for a nuclear reactor Feb. 24, 1987
4641409 Reconstituting a nuclear reactor fuel assembly Feb. 10, 1987
4638556 Locking tube insertion fixture and method in a reconstitutable fuel assembly Jan. 27, 1987
4632804 Fuel assembly for a boiling water reactor Dec. 30, 1986
4631168 Nuclear reactor fuel assembly with a removable top nozzle Dec. 23, 1986
4617171 Device for fixing a guide tube in a recess on the end fitting of a nuclear reactor fuel assembly Oct. 14, 1986
4603027 Removable top nozzle and tool for a nuclear reactor fuel assembly Jul. 29, 1986
4599213 Nuclear fuel assembly with replaceable fuel elements Jul. 8, 1986
4578241 Earthquake-proof fuel assembly Mar. 25, 1986
4563328 Nuclear reactor fuel assembly Jan. 7, 1986
4560532 Nuclear fuel assembly Dec. 24, 1985
4551300 Nuclear reactor fuel assembly end fitting Nov. 5, 1985
4543233 Mechanically attached load pad for liquid metal nuclear reactor fuel assemblies Sep. 24, 1985
4540545 Devices for securing fuel assemblies to nuclear reactor pressure vessels Sep. 10, 1985
4534933 Nuclear reactor fuel assembly with improved top nozzle and hold-down means Aug. 13, 1985
4521374 Fuel grid with sleeves welded in notched grid straps Jun. 4, 1985
4489037 Apparatus for automatically adjusting channel box fitting position relative to nuclear fuel assembly Dec. 18, 1984
4452755 Fuel rod retention device for a nuclear reactor Jun. 5, 1984
4448745 Lateral support for nuclear fuel assemblies May. 15, 1984
RE31583 Fuel assembly hold-down device May. 8, 1984
4416848 Device for fixing a guide tube Nov. 22, 1983
4391771 Arrangement for retaining a fuel rod in a reconstitutable fuel assembly Jul. 5, 1983

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