| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 376438000 |
Including grid
| 79 |
| 376435000 |
Wherein the fissile content varies radially or axially across the pack or bundle
| 7 |
| 376446000 |
With removable member | 5 |
| 20090122947 | Joining Structure Between Top Nozzle and Guide Thimbles In Nuclear Fuel Assembly - Disclosed herein is a joining structure between a top nozzle and guide thimbles in a nuclear fuel assembly, which can prevent a rotation of inner insertion tube bodies when the top nozzle is separated from the nuclear fuel assembly and promote convenience in assembling and disassembling the top nozzle and the guide thimbles. | 05-14-2009 |
| 20100119031 | COUPLING STRUCTURE OF FUEL ASSEMBLY - A coupling structure of a fuel assembly includes a screw coupling means to provide a coupling structure of a fuel assembly which prevents foreign matters from mixing in the fuel and in which no vertical play is generated at a fitting portion between a latch sleeve | 05-13-2010 |
| 20110182396 | GUIDE THIMBLE PLUG FOR NUCLEAR FUEL ASSEMBLY - A guide thimble plug for a nuclear fuel assembly is provided, in which an internal threaded hole is formed through a main body so that the main body is coupled to a bottom nozzle by a screw coupling. An upper insert part is formed in the upper end of the main body. The upper insert part is inserted into a shock absorption tube. A thermal deformation prevention part is formed on the main body below the upper insert part and is recessed inward from the outer surface of the main body such that, when the main body is coupled to the guide thimble, a gap is defined between the thermal deformation prevention part and the guide thimble. The guide thimble and the shock absorption tube can be reliably fastened to the bottom nozzle, and thermal deformation of the guide thimble can be minimized. | 07-28-2011 |
| 20120087458 | NUCLEAR FUEL ASSEMBLY HOLD DOWN SPRING - A nuclear fuel assembly having a plurality of multi-leaf hold down spring sets extending from a top nozzle. Each spring set consists of a multiple number of springs leafs in order to provide a large working range of spring deflection. Each spring leaf has a straight, flat base section followed by a straight, flat tapered beam with a secondary spring set having a curvature at its peripheral end. | 04-12-2012 |
| 20120099695 | FUEL GUIDE PIN, FUEL GUIDE PIN ATTACHMENT METHOD, CORE PLATE, AND NUCLEAR REACTOR - A fuel guide pin to be fixed to a core plate includes a shrink fit portion | 04-26-2012 |
| 376443000 |
With coolant flow path deflecting means | 2 |
| 20120201342 | NUCLEAR FUEL ASSEMBLY AND NUCLEAR REACTOR COMPRISING AT LEAST ONE SUCH ASSEMBLY - A nuclear fuel assembly including: a casing delimiting an inner space divided into a central part as a fissile zone, in which a bundle of nuclear fuel pins is located, an upper part, and a lower part; a lower end including a coolant supply inlet; an upper end including a coolant evacuation outlet; pins in a bundle of pins including an upper and/or a lower plenum; a mechanism creating a communication with the lower part of the inner space of the casing with the zone surrounding the assembly, as an inter-assembly zone, through the wall of the casing; and an upper neutron protection mechanism inside the casing. | 08-09-2012 |
| 20130308742 | FUEL BUNDLE FOR A LIQUID METAL COOLED NUCLEAR REACTOR - In one embodiment, a fuel bundle for a liquid metal cooled reactor includes a channel, a nose assembly secured to a lower end of the channel, a plurality of fuel rods disposed within the channel, and an internal mixer disposed within the channel above the plurality of fuel rods. The internal mixer includes peripheral flow control members and interior flow control members. The peripheral flow control members are located near walls of the channel, and the interior flow control members are located towards a longitudinal center of the housing. At least one of the peripheral flow control members is configured to direct liquid metal flowing through the channel towards an interior of the channel, and at least one of the interior flow control members is configured to direct liquid metal flowing through the channel away from the interior of the channel. | 11-21-2013 |
| 376449000 |
Having provision or structure for insertion of control elements therein | 2 |
| 20120014496 | FUEL ASSEMBLY - A fuel assembly for a nuclear boiling water reactor is provided. The reactor comprises a plurality of such fuel assemblies and a plurality of control rods. Each control rod is insertable between the fuel assemblies. The fuel assembly has a longitudinal center axis and includes a plurality of elongated fuel rods and an elongated channel box. The channel box has inner sides, facing the fuel rods, and outer sides. Each inner and outer side has a longitudinal center line extending in parallel with the center axis and along the length of the channel box. A number of protrusions are distributed along the center line of at least two of the outer sides. The protrusions are configured to ensure a minimum distance between the outer side and an adjacent control rod and to enable the control rod to easily slide over and on top of the protrusions. | 01-19-2012 |
| 20160093407 | PRESSURIZED WATER REACTOR FUEL ASSEMBLY - An elongated control rod guide thimble for a nuclear reactor having a tube-in-tube dashpot design that has circumferential slots in the dashpot walls that align with spaced openings in the guide thimble sheath. The dashpot tube has an end plug with a threaded opening extending axially therethrough which is captured by a thimble screw that extend through an opening in the bottom nozzle and sandwiches an end plug attached to the guide thimble sheath between the dashpot tube end plug and the bottom nozzle. | 03-31-2016 |
| 376437000 |
Having the fuel element ends positioned on or attached to rails | 2 |
| 20120093275 | TIERED TIE PLATES AND FUEL BUNDLES USING THE SAME - Example embodiments are directed to tiered tie plates and fuel bundles that use tiered tie plates. Example embodiment tie plates may include upper and lower tiered tie plates. Example embodiment tiered tie plates may have a plurality of bosses divided into groups, or tiers, having differing vertical (axial) displacement. Example embodiment fuel bundles may use tiered tie plates such that fuel rods in example bundles may originate and terminate at different vertical displacements, based upon the vertical displacement of the bosses receiving the fuel rods into the tiered tie plates. Optionally, shanks may be used to further vary fuel rod axial displacement and diameter. | 04-19-2012 |
| 20130163712 | BWR NUCLEAR FUEL ASSEMBLY WITH SNAP-IN SLEEVE SPRING - A nuclear fuel assembly is provided for a boiling water reactor. The nuclear fuel assembly includes a base, a head, and a bundle of full length fuel rods and partial length fuel rods, said bundle extending upwardly and longitudinally from the base to the head. The nuclear fuel assembly includes at least one clamp for longitudinally retaining a lower plug of a partial length fuel rod with respect to the base. The clamp is an additional part fitted to the base, the clamp is at least partially received in a housing provided in the base, and the clamp is assembled to the base by mechanical engagement of complementary assemblies. | 06-27-2013 |
| 376447000 |
Including separate burnable poison or moderator | 1 |
| 20090252282 | Fuel Assembly - A fuel assembly, comprising:
| 10-08-2009 |
| 376448000 |
With means for spacing apart adjacent packs or bundles | 1 |
| 20080304612 | Nuclear Fuel Assembly Including an Internal Reinforcing Device - The nuclear fuel assembly means a group of nuclear fuel rods disposed in a substantially regular array together with a support skeleton ( | 12-11-2008 |
| 376436000 |
Wire-wrapped fuel elements | 1 |
| 20170236602 | FUEL BUNDLE FOR A LIQUID METAL COOLED NUCLEAR REACTOR | 08-17-2017 |
| Entries |
| Document | Title | Date |
|---|
| 20090034675 | FUEL ASSEMBLY OF PRESSURIZED WATER REACTOR AND METHOD OF DESIGNING FUEL ASSEMBLY - In a fuel assembly for a pressurized water reactor and a method of designing the fuel assembly, fuel pellets made from a sintered uranium oxide are put into a zirconium metal alloy fuel cladding tube and form a fuel rod. The fuel rods are bundled together in a matrix form to form the fuel assembly. When an outer diameter of the fuel pellet increases, a weight of uranium loaded in the fuel assembly is increased. An amount of increase in reactivity caused by the decrease in burnup brought about by the increase in uranium weight exceeds an amount of decrease in reactivity caused by an insufficient moderation due to decrease in a moderator in a region A. The diameter of the fuel pellet is determined so as to fall within the region A where the increase in reactivity exceeds. | 02-05-2009 |
| 20090034676 | WATER ROD FOR BOILING WATER NUCLEAR REACTOR FUEL ASSEMBLY AND METHOD FOR IMPROVING WATER FLOW THROUGH THE ASSEMBLY - A nuclear reactor fuel bundle assembly has been developed that includes: a fuel bundle including an array of fuel rods attached to a lower tie plate, an upper tie plate and housed in walls of a channel, and a water rod, having an upper discharge end below and unattached to the upper tie plate, and the upper discharge end having an unobstructed opening. | 02-05-2009 |
| 20090252281 | TUBE-IN-TUBE THREADED DASHPOT END PLUG - A nuclear fuel assembly having a tube-in-tube control rod guide tube design that incorporates an end plug that extends axially upward to an elevation above the lower most grid where it is sealed at its upper end to the lower end of the control rod guide tube. The guide tube lower end plug has a threaded recess in its upper surface that mates with a corresponding dashpot end plug threaded extension that is formed as an insert in the lower end of the guide tube. A hole formed through the outer wall of the guide tube end plug at the elevation of the lower portion of the recess provides a positive inspection port for assuring the proper seating of the dashpot. A method of manufacture of such a fuel assembly is also disclosed. | 10-08-2009 |
| 20100027733 | CHANNEL CONFINEMENT SYSTEM AND METHOD FOR DRY-STORAGE OF BWR FUEL BUNDLES - A nuclear reactor fuel bundle confinement system including: a fuel bundle with an upper tie plate; a channel enclosing the fuel bundle; a handle for the fuel bundle extending above the fuel bundle; an upper fuel particle barrier positioned over the upper tie plate and above the fuel rods, wherein the fuel particle barrier has a permeable panel at least co-extensive with an open area of the upper tie plate; a slot in the permeable panel through which passes the handle, and a closure device on the fuel particle barrier having a closed position which covers the slot and an open position that leaves the slot open; a lower fuel particle barrier positioned over the lower tie plate and below the fuel rods, wherein the lower portion of the fuel bundle assembly is grasped by the lower fuel particle barrier. | 02-04-2010 |
| 20130058449 | FUEL ASSEMBLY, A GUIDE THIMBLE DEVICE AND USE OF THE GUIDE THIMBLE DEVICE - The invention refers to a fuel assembly comprising a lower end structure, an upper end structure including a top nozzle ( | 03-07-2013 |
| 20130077732 | BUNDLE RETENTION CLIP, FUEL ASSEMBLY INCLUDING THE SAME, AND METHOD OF ASSEMBLING FUEL ASSEMBLY - A fuel assembly may include a channel nosepiece; a lower tie plate positioned above the channel nosepiece; and at least one bundle retention clip connected to the channel nosepiece and the lower tie plate and configured to resist movement of the lower tie plate away from the channel nosepiece. | 03-28-2013 |
| 20140169516 | FUEL RODS WITH VARYING AXIAL CHARACTERISTICS AND NUCLEAR FUEL ASSEMBLIES INCLUDING THE SAME - Nuclear fuel rods have cladding or fuel with physical parameters that substantially change based on axial position within a rod. Parameters include inner and outer cladding and fuel diameters or widths, volume, mass, internal volume, thickness, rod width, etc. Parameters are selected and implemented based on calculated operating conditions and/or desired fuel response at an axial position across an entire rod length and/or fuel assembly position, including both fueled regions and non-fueled zones. Desired parameters can be achieved through fabrication or later alterations. Parameter variations versus axial position and fuel assembly position are intentional and achieve desired fuel properties and responses, such as optimized fuel mass, pressure drop, over-pressurization protection, etc. Fuel rods can be compatible with existing fuel types and replace conventional fuel rods therein. | 06-19-2014 |
| 20140185734 | FUEL ASSEMBLY - Disclosed embodiments include fuel ducts, fuel assemblies, methods of making fuel ducts, methods of making a fuel assembly, and methods of using a fuel assembly. | 07-03-2014 |
| 20150302941 | Nuclear reactor fuel assembly - The present disclosure provides for designs of fuel assemblies and may be used in pressurized water reactors. In some embodiments, a nuclear reactor fuel assembly may comprise a bundle of fuel rods, guide channels, two nozzles, one of which has a bearing plate with openings, elements for the detachable connection of the nozzles to the guide channels, a detachable connection locking device and a locking device fasteners, the elements for the detachable connection of the nozzles to the guide channels have a cross-section size greater than the size of the openings in the nozzle bearing plate. The present disclosure may provide greater ease in loading and unloading, reduce the time required for the mounting and removal of the nozzles during manufacture of the fuel assembly, and reduce the length of the reactor refueling process. | 10-22-2015 |
