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Class Information
Number: 976/DIG.113
Name: Nuclear technology > Control of nuclear reaction [g21c-7/00]
Description:










Sub-classes under this class:

Class Number Class Name Patents
976/DIG.117 By application of neutron-absorbing material (i.e., material with absorption cross section very much in excess of reflection cross section) [g21c-7/06] 10
976/DIG.132 By displacement of the moderator or parts thereof; by changing the moderator concentration [g21c-7/26] 8
976/DIG.135 By displacement of the reactor fuel or fuel elements [g21c-7/30] 14
976/DIG.134 By displacement of the reflector or parts thereof [g21c-7/28] 3
976/DIG.115 By using self-regulating properties of reactor materials (e.g., doppler effect) [g21c-7/02] *** (arrangements that involve temperature stability dig. 136) 2
976/DIG.137 By utilization of a primary neutron source [g21c-7/34] 3
976/DIG.136 By varying flow of coolant through the core; by adjusting the coolant or moderator temperature [g21c-7/32] 6
976/DIG.138 Control circuits [g21c-7/36] 47
976/DIG.114 Flux flattening [g21c-7/00b] 7


Patents under this class:

Patent Number Title Of Patent Date Issued
5064607 Hybrid nuclear reactor grey rod to obtain required reactivity worth Nov. 12, 1991
5032346 Method of determining and evaluating the emergency shutdown margin for a pressurized water nuclear reactor Jul. 16, 1991
4943408 Method and apparatus for operating nuclear electric power generating plants Jul. 24, 1990
4876057 Control process for a nuclear reactor Oct. 24, 1989
4842813 Nuclear reactor having a longitudinally elongated vessel Jun. 27, 1989
4801422 Apparatus for installing and removing a control rod drive in a nuclear reactor Jan. 31, 1989
4772448 Support pin system and locking nut retainer Sep. 20, 1988
4767595 Repositioned fuel assembly Aug. 30, 1988
4762670 Cleaning apparatus for atomic reactor control rod driving means (CRD) Aug. 9, 1988
4751042 Removable control rod drive shaft guide Jun. 14, 1988
4734249 Nuclear reactor start-up method Mar. 29, 1988
4729868 Vibration arrestor for rod guide support structure of the inner barrel assembly of a pressurized water reactor Mar. 8, 1988
4699749 Controlling a nuclear reactor with dropped control rods Oct. 13, 1987
4689195 Fuel assembly Aug. 25, 1987
4647421 Operation control method for nuclear reactor Mar. 3, 1987
4642213 Anticipatory control of xenon in a pressurized water reactor Feb. 10, 1987
4637914 Quick release guide sleeve assembly Jan. 20, 1987
4632803 Operating method of boiling water reactor Dec. 30, 1986
4605530 Operating method for nuclear power plants Aug. 12, 1986
4582669 Xenon suppression in a nuclear fueled electric power generation system Apr. 15, 1986
4581196 Method of and apparatus for controlling output power of nuclear reactor Apr. 8, 1986
4548784 Nuclear reactor power control system Oct. 22, 1985
4533514 Nuclear reactor degassing method and degassing system Aug. 6, 1985
4486380 Method of shutting down a high-temperature reactor Dec. 4, 1984
4477804 Electrical circuit for providing an abnormal transient display system for nuclear reactor operation Oct. 16, 1984
4470949 Method of control of a nuclear reactor by movement within the core of this reactor, of groups of control rods Sep. 11, 1984
4399095 Protection and control system for a nuclear reactor Aug. 16, 1983
4382059 Power change operating method of a boiling water reactor May. 3, 1983
4368171 Method of controlling operation of nuclear reactor Jan. 11, 1983
4368170 Method of operating nuclear reactors Jan. 11, 1983
4333797 Reactor power control apparatus Jun. 8, 1982
4302287 Nuclear reactor operation control process Nov. 24, 1981
4293382 Method of starting up a nuclear reactor Oct. 6, 1981
4293380 Reactor and fuel assembly design for improved fuel utilization in liquid moderated thermal reactors Oct. 6, 1981
4285769 Control cell nuclear reactor core Aug. 25, 1981
4279698 Nuclear reactor operation control process Jul. 21, 1981
4255236 Reactor and fuel assembly design for improved fuel utilization in liquid moderated thermal reactors Mar. 10, 1981
4248667 Method of operating nuclear reactors Feb. 3, 1981
4170516 Method of operating a nuclear reactor Oct. 9, 1979
4153506 Method of starting operation of a nuclear reactor May. 8, 1979
4075059 Reactor power reduction system and method Feb. 21, 1978
4057466 Conditioning of nuclear reactor fuel Nov. 8, 1977
T954003 Reactivity control system for nuclear reactors by magnetic means Jan. 4, 1977
4000037 Reactor-turbine control for low steam pressure operation in a pressurized water reactor Dec. 28, 1976











 
 
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