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Class Information
Number: 976/DIG.119
Name: Nuclear technology > Control of nuclear reaction [g21c-7/00] > By application of neutron-absorbing material (i.e., material with absorption cross section very much in excess of reflection cross section) [g21c-7/06] > By displacement of solid control elements (e.g., control rods) [g21c-7/08] > Construction of control elements [g21c-7/10]
Description:










Sub-classes under this class:

Class Number Class Name Patents
976/DIG.124 Cluster or spider control rods [g21c-7/10f] 39
976/DIG.120 Control assemblies containing one or more absorbant as well as other elements (e.g., fuel or moderator elements) [g21c-7/10b] 11
976/DIG.121 Control elements adapted for pebble bed reactors [g21c-7/10c] 10
976/DIG.123 Control elements made of flat elements; control elements having cruciform cross section [g21c-7/10e] 19
976/DIG.122 Deformable control elements (e.g., flexible, telescopic or articulated) [g21c-7/10d] 7


Patents under this class:

Patent Number Title Of Patent Date Issued
5064602 Control rod flow diverters Nov. 12, 1991
4938918 Element immersed in coolant of nuclear reactor Jul. 3, 1990
4853176 Hafnium stainless steel absorber rod for control rod Aug. 1, 1989
4844859 Removable and lockable guide ring in an orifice passing through a plate and its use for a guide tube of a nuclear reactor Jul. 4, 1989
4842815 Device for locking a guide ring on a plate having an orifice and its use for a guide tube of a nuclear reactor Jun. 27, 1989
4836977 Standardized reduced length burnable absorber rods for a nuclear reactor Jun. 6, 1989
4762661 Upper end piece for nuclear fuel assemblies Aug. 9, 1988
4728487 Standardized reduced length burnable absorber rods for a nuclear reactor Mar. 1, 1988
4725401 Element immersed in coolant of nuclear reactor Feb. 16, 1988
4699756 Full length control rod employing axially inhomogeneous absorber materials for zero reactivity redistribution factor Oct. 13, 1987
4678628 Nuclear reactor control rod cluster for enthalpy rise compensation Jul. 7, 1987
4666653 Fuel assembly with cooled guide tubes for a nuclear reactor May. 19, 1987
4664878 Light water moderator filled rod for a nuclear reactor May. 12, 1987
4656734 Apparatus for replacement of guide pins of a guiding tube forming part of the top internal equipment of a pressurized water nuclear reactor Apr. 14, 1987
4652424 Extended life nuclear control rod Mar. 24, 1987
4624827 Nuclear reactor control rod having a reduced worth tip Nov. 25, 1986
4606109 Element immersed in coolant of nuclear reactor Aug. 19, 1986
4597935 Nuclear reactor having a control cluster guide Jul. 1, 1986
4585613 Process for the replacement of guide pins of a guiding tube forming part of the top internal equipment of a pressurized water nuclear reactor, and corresponding apparatus Apr. 29, 1986
4584168 System for controlling destructive vibration of a nuclear control rod Apr. 22, 1986
4476088 Latching devices and nuclear reactors incorporating such latching devices Oct. 9, 1984
4462957 Sliding mechanism Jul. 31, 1984
4440339 Method of repairing housing of control rod driving system Apr. 3, 1984
4367196 Neutronic reactor Jan. 4, 1983
4342722 Control rod for a nuclear reactor Aug. 3, 1982
4322853 Nuclear reactor control Mar. 30, 1982
4314881 Reactor control rod timing system Feb. 9, 1982
4311560 Stabilizing device for control rod tip Jan. 19, 1982
4288898 Control rod drive mechanism closure device Sep. 15, 1981
4172762 High exposure control rod finger Oct. 30, 1979
4062725 Part length control rod Dec. 13, 1977
3994775 Control rod system useable for fuel handling in a gas-cooled nuclear reactor Nov. 30, 1976
3981700 Vent structure Sep. 21, 1976
3975233 Neutronic reactor Aug. 17, 1976
3948628 Vent assembly including an air lock Apr. 6, 1976
3947321 Control and shim rod arrangement with moveable plugs Mar. 30, 1976
3942232 Vent structure fabrication method Mar. 9, 1976
3933581 Control rod drive for reactor shutdown Jan. 20, 1976
3931835 Long term vent structure Jan. 13, 1976











 
 
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