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| Number | Title | Issue Date |
| 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 of a cylindrical tube. The movable ferromagnetic element is magnetic... | 03/18/2008 |
| 6912264 | Fuel assembly A fuel element for a nuclear reactor has fuel rods with nuclear fuel guided through spacers. The spacers are equipped with devices that exert a swirling impulse upon a coolant flowing along the fuel rods. In order to present as little flow resistance as possible for... | 06/28/2005 |
| 6813329 | Crud-resistant nuclear fuel cladding A crud-resistant nuclear fuel element cladding in which the axial locations that experience nucleate boiling during reactor full power operation are highly polished so that the maximum size of any surface defect on the highly polished surface is approximately 0.1 mi... | 11/02/2004 |
| 5465282 | Fuel assembly for a nuclear reactor A fuel assembly for a nuclear reactor, comprising a number of parallel fuel rods which are retained by means of spacer grids, arranged along the fuel rods, as well as guide thimbles wherein the guide thimbles, are fixed to the spacer grids. The guide thim... | 11/07/1995 |
| 5182077 | Water cooled nuclear reactor and fuel elements therefor A fuel rod for a water cooled nuclear reactor comprises a cladding made of a continuous wound ceramic fiber tube. The wound fibers are impregnated with a matrix to achieve a required density and exposed to ammonia gas to create a solid gel. The gel is fir... | 01/26/1993 |
| 5171521 | Intertube thermal conductance rate limiting device The invention provides an intertube thermal conductance rate limiting device for a nuclear reactor fuel channel having an inner pressure tube and outer calandria tube. The device comprises a wire screen placed in the annular region between the pressure tu... | 12/15/1992 |
| 5001949 | Apparatus and method for removing nuclear fuel assembly end pieces An apparatus is used for cutting guide tubes of a nuclear fuel assembly below an end-piece and removing the end-piece. The apparatus includes a mount which may be removably locked and centered on the end-piece. Cutting tools insertable in the guide tubes ... | 03/26/1991 |
| 4968480 | Nuclear reactor fuel elements A nuclear reactor fuel element is helically wound with a strip which on one face at regular intervals along its length has dimples, and has a continuous rib on the opposite face. The strip contacts the associated fuel pin cladding via the dimples which ef... | 11/06/1990 |
| 4803041 | Process for the recycling of nuclear fuel pellets previously irradiated in a fast neutron nuclear reactor In order to multiply by three or four the combustion level of nuclear fuel pellets in fast neutron nuclear reactors, it is proposed that following a normal irradiation period of said pellets in the reactor core, that the irradiated can be replaced by a ne... | 02/07/1989 |
| 4701296 | Fuel array for an undermoderated nuclear reactor Fuel array for an undermoderated nuclear reactor, comprising rods (6) arranged in a prism-shaped casing (1) parallel to the height of this casing (1). The internal surface of each of the walls (2) of the casing (1) is provided with channels (5) each of th... | 10/20/1987 |
| 4666653 | Fuel assembly with cooled guide tubes for a nuclear reactor The invention relates to a fuel assembly with cooled guide tubes for a nuclear reactor. It consists of a bundle of parallel fuel tubes (1) held in a structure comprising spacer grids, guide tubes (6) and end plates. At least a part of the guide tubes (10)... | 05/19/1987 |
| 4654193 | Fuel assembly for fast reactors This invention relates to a fuel assembly for fast reactors and aims to reduce stresses induced in fuel pins by interaction between a wrapper tube and a bundle of fuel elements each of which consists of the fuel pin and a wire spacer wound around the fuel... | 03/31/1987 |
| 4631167 | Method for the production of a nuclear reactor assembly and assembly obtained by this method The invention relates to a method for producing an assembly, as well as to an assembly produced by this method. The foot of the assembly is butt welded to the hexagonal tube prior to the introduction of the bundle of rods into the latter. This introduction ... | 12/23/1986 |
| 4557892 | Nuclear fuel element A nuclear fuel element suitable for use in fast breeder. The fuel element has a clad tube and a wire spacer wound round the clad tube. The clad tube of the fuel element is composed of a first clad tube and a second clad tube which are connected to each ot... | 12/10/1985 |
| 4386456 | Method of assembling a unitary heat exchanger tube bundle assembly An improved heat exchanger in which the tube bundle therein comprises a plurality of tubes supported intermediate their ends by at least one annular enlargement disposed around and frictionally secured to the outer surface of at least one of the tubes wit... | 06/07/1983 |
| 4235669 | Nuclear reactor composite fuel assembly A core and composite fuel assembly for a liquid-cooled breeder nuclear reactor including a plurality of elongated coextending driver and breeder fuel elements arranged to form a generally polygonal bundle within a thin-walled duct. The breeder elements ar... | 11/25/1980 |
| 4147591 | Fuel assembly of fast breeder reactor This invention relates to fuel assembly for Fast Breeder Reactor, such as wire spacer fuel assembly, in which the thickness of cladding tubes in the upper end portion of fuel pins positioned in the peripheral region of the assembly is made larger than tha... | 04/03/1979 |
| 4038138 | Nuclear reactor fuel elements A nuclear reactor fuel element having wire wrap spacing means of a form which contacts the fuel element at a series of regularly spaced intermittent points so that coolant can flow between the wire wrap and the fuel element and between the points of conta... | 07/26/1977 |
| 4005521 | Locked-wrap fuel rod A method for spacing fast reactor fuel rods using a wire wrapper improved by orienting the wire-wrapped fuel rods in a unique manner which introduces desirable performance characteristics not attainable by previous wire-wrapped designs. Use of this method... | 02/01/1977 |
| 4003787 | Device for supporting a fuel-pin cluster within a nuclear reactor fuel assembly wrapper A supporting member for an array of parallel rails each carrying one row of slidably mounted pins of a fuel clister is placed coaxially at the lower end of a vertical fuel assembly wrapper. The ends of the rails are engaged in vertical slots formed in the... | 01/18/1977 |
| 3997395 | Nuclear fuel assembly The fuel assembly comprises at least one cluster of canned-fuel pins disposed on a uniform lattice within a sleeve defining a duct through which a coolant is circulated. Each fuel pin is provided at least over the greater part of its length with a helical... | 12/14/1976 |
| 3996101 | Device for supporting a fuel pin cluster within a nuclear reactor fuel assembly wrapper A supporting member for an array of parallel rails each carrying one row of slidably mounted pins of a fuel cluster is placed coaxially at the lower end of a vertical fuel assembly wrapper. Each parallel rail is provided at each end with a downward extens... | 12/07/1976 |
| 3964968 | Nuclear reactor fuel assembly A nuclear reactor fuel assembly, wherein at least some of the fuel elements are provided with spacer members. The spacer members are arranged in a helical line on the lateral surface of each of said fuel elements having spacer members. A spacer member is ... | 06/22/1976 |
| 3944468 | Fuel pin cluster for a high-power reactor Each fuel pin of the cluster is fitted with a spacer element wound in a coarse-pitch helix on the external surface of the fuel can and attached to end-caps of the can. The spacer element consists of a deformable tube having a constant initial cross-sectio... | 03/16/1976 |
| 3930940 | Nuclear fuel subassembly A nuclear fuel sub-assembly comprises a bundle of fuel pins provided with helical spacers and located within a shroud for the coolant. The sub-channels at the periphery of the bundle are restricted in order that the rate of flow matches the heat transfer ... | 01/06/1976 |
