Patents
Patents for G21C 7 - Control of nuclear reaction (2,764)
02/1995
02/21/1995US5392326 Boiling water reactor
02/21/1995US5392321 Method and system for magnetic coupling compensating a rod position indication system
01/1995
01/31/1995US5386439 Rods of depleted uranium and thorium
01/26/1995DE4423128A1 Reactor core for a boiling water nuclear reactor
01/03/1995US5378064 Control rod driving system
12/1994
12/27/1994US5377235 Control rod canopy seal positioning and welding system
12/21/1994CN1027109C Nuclear reactor intervals with eluster guides
12/13/1994US5373539 Safety system grade apparatus and method for detecting a dropped control rod and malfunctioning exit thermocouples in a pressurized water reactor
12/08/1994WO1994028556A1 Neutron absorber material and method of manufacture
12/08/1994WO1994028185A1 Hafnium alloys as neutron absorbers
12/08/1994DE4418500A1 Fuel element for a boiling water reactor
12/08/1994CA2140556A1 Neutron-absorbing material and its production process
12/07/1994CN1096128A Slotted hydraulic step-by-step cylinder for control rods of reactors
11/1994
11/30/1994EP0626698A1 Safety grade apparatus and method for detecting a dropped rod and malfunctioning exit thermocouples in a pressurized water reactor
11/23/1994CN1026735C Combined valve for reactor control rod hydraulic driving system
11/17/1994EP0624883A1 Sealing process and device for a feedthrough tube in a convex wall of a nuclear reactor component
11/13/1994CA2123381A1 Process and device for fixedly sealing pipes through bulged walls of a nuclear reactor component
11/08/1994US5363421 Control rod guide tube
11/01/1994US5361279 Internal control rod drive for a BWR
10/1994
10/05/1994CN1093195A Internal equipment for a nuclear reactor having control cluster guides
09/1994
09/27/1994US5350542 Separation of troublesome isotopes from erbium and gadolinium isotope mixtures
09/22/1994DE4308612A1 Aluminium-alloy contg. boron and process for mfr. thereof
09/13/1994US5347550 Core of light-water reactor
08/1994
08/03/1994CN1090265A Process for the preparation of trifluorobenzene derivatives
07/1994
07/26/1994US5333160 Control rod position transmitter
07/19/1994US5330589 Hafnium alloys as neutron absorbers
07/12/1994US5329563 Control rod latch tool
07/12/1994US5327930 Nuclear reactor locking piston drive system and valve assembly
07/07/1994WO1994014993A1 Manufacture of materials and workpieces for components in nuclear plant applications
07/07/1994CA2149666A1 Manufacture of materials and workpieces for components in nuclear plant applications
06/1994
06/23/1994WO1994014164A1 Wear resistant coating for components of fuel assemblies and control assemblies and method of applying a wear resistant coating
06/21/1994US5323435 Control rod housing support bars with wing assemblies
06/15/1994CN1025087C Hole-alignment type hydraulic step cylinder for reactor control rod driving
06/14/1994US5321732 Control rod housing support bars with radiation shields
05/1994
05/31/1994US5317606 Automation system for nuclear power plants
05/24/1994US5315626 Continuously feeding hydrazine hydrate into cooling medium which also contains potassium and/or lithium hydroxides; controlling efficiency by controlling boric acid concentration
05/11/1994EP0596754A2 Nuclear reactor hydraulic control rod drive with locking piston system and valve assembly
04/1994
04/27/1994EP0594381A1 Control blade servicing assembly
04/27/1994EP0593470A1 Material and workpiece for nuclear engineering and production thereof
04/27/1994EP0593469A1 Material and workpiece for nuclear engineering and production thereof
04/26/1994US5307391 Method for treatment of primary coolant medium of a pressurized water nuclear reactor
04/26/1994US5307384 Segmented coil assembly for control rod drive
04/20/1994EP0593295A1 Control rod spacer pad
04/19/1994US5305358 Control rod drive handling equipment
04/13/1994EP0592296A1 Nuclear reactor internals with control rod guides
04/13/1994EP0592289A1 Nuclear reactor internals with support columns and control cluster guides
04/05/1994US5301216 Method of operating a nuclear reactor with emergency cooling system economy
03/1994
03/29/1994US5299242 Dual annular rotating "windowed" nuclear reflector reactor control system
03/22/1994US5297174 Safety system grade apparatus and method for detecting a dropped control rod and malfunctioning exit thermocouples in a pressurized water reactor
03/09/1994EP0585499A1 Low pressure coolant injection modification for boiling water reactors
03/08/1994US5293411 Nuclear reactor power control method and device
03/03/1994WO1994005014A1 Nuclear reactor element, composed of combined fuel and absorber elements, which acts as a control column
03/03/1994WO1994005013A1 Control column consisting of a fuel element and an absorber element for a nuclear reactor
03/03/1994DE4229091A1 Inherently safe reactivity control mechanism for nuclear reactors - dependent upon maintenance of 0.5 - 1 percent of the reactivity producing fuel suspended in a diverted part of the main coolant flow
03/01/1994US5291530 Drawing refueling fluid; displacement with replacement solution
02/1994
02/24/1994DE4227794A1 Kernreaktorelement, insbesondere Absorberelement Nuclear reactor element, in particular absorber element
02/24/1994DE4227793A1 Steuersäule aus einem Brennelement und einem Absorberelement für einen Kernreaktor Control column of a fuel element and an absorber element for a nuclear reactor
02/19/1994CA2099324A1 Fuel bundle for a heavy-water moderated thermal breeder
02/16/1994EP0583187A1 Inspection device for the guiding components of a guide tube in the upper internals of a pressurized water nuclear reactor
02/10/1994DE4323550A1 Process to alter neutron energy spectrum in a light water reactor - by use of trans=plutonium elements within energy spectrum altering rods that can be inserted into or withdrawn from core
01/1994
01/25/1994US5282232 Nuclear reactor upper internal equipment with cluster guide devices
01/19/1994CN1023581C Control assembly with changeable units for nuclear reactor
01/04/1994US5276719 Hydraulic control rod drive for a nuclear reactor
01/04/1994US5276718 Control blade for nuclear reactor
12/1993
12/28/1993US5273709 Reacting a consolidated and densified mixture of gadolinium or alloys, boron carbide and gadolinium oxide
12/21/1993US5272733 Control rod driving system
12/15/1993EP0574193A1 Core-control assembly with a fixed fuel support
12/14/1993US5271052 Enriched boron-10 boric acid control system for a nuclear reactor plant
12/07/1993US5268941 Control rod canopy seal positioning and welding system
11/1993
11/30/1993US5267290 Zirconium alloy absorber layer
11/30/1993US5267286 Fuel assembly and reactor core
11/30/1993US5267284 Zirconium alloy containing isotopic erbium
11/11/1993WO1993022771A1 Fuel element with displacement elements
10/1993
10/20/1993EP0566396A2 Method of manufacturing neutron-shielding tubes and neutron shielding tubes obtained by the same
10/14/1993DE4212284A1 An automatic shut=down device for nuclear, esp. sodium cooled, reactors - based on an expansion device driven by coolant temperature rises
10/06/1993CN1022356C Method of renovating the control system for controlling control clusters in unclear reactor, and corresponding control system
10/06/1993CN1022355C Centering and fixation device for a cluster guide flange of a core plate of a nuclear reactor
10/05/1993US5250231 Selectively removing a naturally occuring isotope, e.g.erbium 166, having a mass one less than a second naturally occuring isotope, erbium 167 and having a lower thermal nuclear cross-section
09/1993
09/28/1993US5249209 Control rod canopy seal positioning and welding system
09/28/1993US5249207 Apparatus for monitoring the neutron flux of a nuclear reactor
09/21/1993US5247549 Control rod spacer pad
09/21/1993US5247545 Control blade servicing assembly
09/07/1993US5242622 Hafnium and boron carbide
08/1993
08/31/1993US5241570 Core-control assembly with a fixed fuel support
08/17/1993US5237595 Guide plate for guide tubes used in nuclear reactors
08/03/1993US5232656 Fast-acting nuclear reactor control device
07/1993
07/20/1993US5229066 Control rod position indication system
07/13/1993US5227128 Reactivity controlled fuel assembly
07/06/1993US5225151 Control rod for nuclear reactors
07/06/1993CA1320012C Reactor control system verification
06/1993
06/30/1993CN1073797A Combination valve for hydraulic driving system of reactor control rod
06/09/1993EP0545866A1 Process for the preparation of trifluorobenzol derivatives
06/09/1993CN1021161C Upper internal nclear reactor equipments including flow seperation device
06/09/1993CN1021160C Power control method and apparatus for natural circulating reactors
06/08/1993US5217678 Gang control-rod controlling system and reactor operation method
06/08/1993US5217677 Control rod drive assembly
06/07/1993CA2084587A1 Process for the preparation of trifluorobenzene derivatives
06/02/1993EP0544506A1 Nuclear reactor with low-level core coolant intake
05/1993
05/25/1993US5213756 Boiling water reactor with expanded core diameter
05/25/1993US5213755 Low pressure coolant injection modification for boiling water reactors
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