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7346141 Apparatus and method for moving a ferromagnetic element  
A device and technique for placing and moving a ferromagnetic element in an annulus between coaxially arranged cylindrical tubes. The device includes an electromagnetic ram moved along the interior...
6516042 Nuclear fuel assembly  
The invention relates to a fuel assembly for a boiling water reactor which is adapted, during operation of the reactor, to allow water to flow upwards through the fuel assembly while absorbing heat...
6470062 Nuclear fuel assembly  
A fuel assembly for a boiling water reactor which is designed to allow water, during operation of the reactor, to flow upwards through the fuel assembly while absorbing heat from a plurality of...
6434209 Critical power enhancement system for a pressurized fuel channel type nuclear reactor using alignment of fuel bundle pairs  
A Critical Channel Power (CCP) enhancement system is provided for a pressurized fuel-channel-type water-cooled nuclear reactor of the type adapted to be refuelled on-line by the insertion and...
6347130 Fuel assembly with short fuel units  
A fuel assembly for a boiling water reactor comprising a plurality of fuel units, stacked on top of each other, each of which comprising a plurality of fuel rods extending vertically between a top...
5878100 Fuel assembly for a boiling water reactor  
A fuel assembly for a boiling water reactor comprises a plurality of first full-length fuel rods arranged in an orthogonal lattice, wherein each fuel rod is included in two rows of fuel rods...
5724398 Nuclear fuel elements  
A nuclear fuel element for use in a gas cooled nuclear reactor, such as a Magnox reactor, has a plurality of fuel pin supports defining an element axis passing through the supports. Suspended...
5410578 Nuclear propulsion rocket  
A nuclear propulsion reactor. A pressure vessel is provided with a reactor core that is surrounded by a radial reflector. Nuclear fuel elements in the core are formed from a hexagonal housing made...
5317611 Stackable truncated conical shell fuel element and an assembly thereof for a nuclear thermal engine  
A modular fuel assembly for a nuclear thermal engine includes a plurality of fuel elements each having a fueled, truncated conical shell and an unfueled peripheral lip at the base of the shell with...
5219519 Increased fuel column height for boiling water reactor fuel rods  
A fuel bundle is disclosed in which interspersed part length fuel rods define between the end of the fuel rods and the upper tie plate void regions which are not otherwise occupied. Full length...
5204053 Bi-level fuel management method for boiling-water nuclear reactor  
Fuel management in a boiling-water nuclear reactor involves arranging fuel bundles in upper and lower matrices of the reactor core. During a refueling operation, some bundles in the upper matrix...
5202084 Bi-level reactor including steam separators  
A nuclear reactor with a recirculating heat transfer fluid has a bi-level core which provides enhanced flexibility in fuel arrangement. The bi-level core includes a first core, a plurality of steam...
5178825 Fuel bundle and spacer utilizing tapered fuel rods  
In a nuclear fuel bundle for a boiling water reactor, the prior art suggested concept of tapered fuel rods forming the bundle array is disclosed in a practical design including a fuel bundle and an...
5162097 Steam cooled nuclear reactor with bi-level core  
In accordance with the present invention, a nuclear reactor with a recirculating heat transfer fluid has a bi-level core which provides enhanced flexibility in fuel arrangement. The bi-level core...
5116567 Nuclear reactor with bi-level core  
A reactor core includes upper and lower matrices of fuel bundles. Fuel rods in the upper matrix have their plenums oriented upward, while fuel rods in the lower matrix have their plenums oriented...
5089219 Gas cooled nuclear fuel element  
A gas cooled nuclear fuel element. A cylindrical tube having an open lower end contains nuclear fuel disks stacked one upon the other to define an annular space between the tube and disks. An upper...
5082617 Thulium-170 heat source  
An isotopic heat source is formed using stacks of thin individual layers of a refractory isotopic fuel, preferably thulium oxide, alternating with layers of a low atomic weight diluent, preferably...
5075072 High temperature control rod assembly  
A high temperature nuclear control rod assembly comprises a plurality of substantially cylindrical segments flexibly joined together in succession by ball joints. The segments are made of a high...
5009837 Axially modular fuel assembly and rod for optimal fuel utilization  
A modular fuel assembly has a plurality of axially stacked subassemblies. The stacked subassemblies includes upper and lower subassemblies which incorporate top and bottom nozzles, and a plurality...
4863672 Absorber rod  
An absorber rod for nuclear reactors with a pile of spherical fuel elements, which is inserted directly into the pile, in order to affect the prevailing neutron flux by absorber material located in...
4716015 Modular nuclear fuel assembly design  
A modular component nuclear fuel assembly design in which sub-assembly fuel modules are joined together to form an integral fuel assembly. The invention permits a defective or damaged fuel assembly...
4704248 High performance fuel element with end seal  
A nuclear fuel element comprising an elongate block of refractory material having a generally regular polygonal cross section. The block includes parallel, spaced, first and second end surfaces....
4547334 Low exchange element for nuclear reactor  
A flow exchange element is presented which lowers temperature gradients in fuel elements and reduces maximum local temperature within high temperature gas-cooled reactors. The flow exchange element...
4274920 Water-cooled nuclear reactor with passive emergency shutdown and core cooling capability and on-line refueling  
A water-cooled nuclear reactor is provided with a passive emergency shutdown and core cooling capability by providing it with emergency fuel element dispersal means operable from internal energy...
4196047 Irradiation surveillance specimen assembly  
A surveillance assembly within a nuclear reactor contains representative reactor material specimens which are to be irradiated. The material specimens are contained within sealed capsules that are...
4154650 Nuclear reactors  
In a nuclear reactor (e.g. one having coolant down-flow through a core to a hearth below) thermal insulation (e.g. of a floor of the hearth) comprises a layer of bricks and a layer of tiles...
4121973 Nuclear reactor with fuel column coolant regulation  
A nuclear reactor is described in which a core having a plurality of columnar fuel regions with coolant passages therein and valve means for each fuel region regulating, separately, the flow of...
4086133 Nuclear reactor core refueling method  
A method for refueling a nuclear reactor core inside a pressure vessel is described. The method is used with a core which has at least one region comprised of a plurality of layers, each layer...
4040902 Method for axially shuffling fuel elements in a nuclear reactor  
A method for axially shuffling fuel elements in a nuclear reactor is disclosed wherein column vacancies are created in a manner to allow substantially lateral transfer of a selected number of fuel...
3941654 Tubular fuel cluster  
A core for a nuclear reactor of high specific power output is provided with an arrangement of fuel bundles in which at least some bundles incorporate tubular pencil elements mounted between end...
3781190 GAS COOLED NUCLEAR REACTORS  
Nuclear reactor wherein stacks of fuel elements are supported centrally within vertical channels of a graphite moderator by annular discs disposed at each end of each fuel element. The discs have...
3773615 IRRADIATION SURVEILLANCE CAPSULE ASSEMBLIES FOR NUCLEAR REACTORS  
In an improved irradiation surveillance capsule assembly for nuclear reactors, means for positioning and coupling together a plurality of specimen compartments of the irradiation surveillance...
3663365 NUCLEAR REACTOR FUEL ELEMENT ASSEMBLIES  
A nuclear reactor fuel element assembly in which a plurality of sleeves arranged end to end house nuclear fuel-containing members arranged in clusters, wherein the ends of the fuel-containing...
3440139 DEVICES FOR HANDLING ANNULAR CHARGES  
3368945 Fuel assembly for a neutronic reactor  
3287230 Nuclear fuel element stringer assembly with improved coupling device  
3284310 Boiling water-superheat nuclear reactor  
3280003 Fuel element for nuclear reactors with pressure tubes  
3276968 Nuclear fuel body containing uranium carbide spheroids coated with silicon carbide  
3274071 Latch device for nuclear fuel  
3274064 Activation analysis nuclear reactor and spool-like fuel element therefor  
3240677 Nuclear reactor having pressure tubes  
3235463 Nuclear reactor  
3231474 Boiling water nuclear reactor and method of operating same  
3227623 Bayonet socket coupling means for fuel elements for nuclear reactors  
3212985 Boiling water nuclear reactor operating with primary and secondary coolant  
3212983 Neutronic reactor  
3208917 Fuel element for a nuclear reactor  
3208915 Pressure tube neutronic reactor  
3194746 Locating means for positioning nuclear fuel components  
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