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| Number | Title | Issue Date |
| 8064564 | Neutron shielding panels for reactor pressure vessels In a nuclear reactor neutron panels varying in thickness in the circumferential direction are disposed at spaced circumferential locations around the reactor core so that the greatest radial thickness is at the point of highest fluence with lesser thicknesses at adj... | 11/22/2011 |
| 7330526 | System and method of storing high level waste A system and method for storing high level waste. In one aspect, the invention is a system comprising: an inner shell forming a cavity for receiving high level waste, the cavity having a top and a bottom; an outer shell surrounding the inner shell so as to form a sp... | 02/12/2008 |
| 7330525 | Method and apparatus for maximizing radiation shielding during cask transfer procedures A transfer cask for maximizing the radiation shielding for spent nuclear fuel during cask transfer procedures has a cylindrical inner shell forming a cavity within which a spent nuclear fuel canister can be placed; a cylindrical outer shell concentric with and surro... | 02/12/2008 |
| 7305242 | System, apparatus, and method for facilitating link selection on electronic devices A system, apparatus, and method for facilitating selection of selectable links presented on a display using an enhanced hovering technique. At least one snap area associated with a link is defined, where the snap area includes a region extending beyond the boundarie... | 12/04/2007 |
| 7294845 | Radiation protection arrangement comprising a separable cover The invention related to a radiation protection arrangement for screening radiation emitted from a radiation source, especially an x-ray source. Said arrangement is provided with a screening element consisting of, or comprising, a radiation protection material, and ... | 11/13/2007 |
| 7257927 | Three-piece frame assembly for window of enclosure Frames are disclosed for mounting windows within the walls of enclosures for isolating or sealing substances such as radioactive or other hazardous substances from the surrounding environment. In a first embodiment of the present invention, a window assembly include... | 08/21/2007 |
| 7185512 | Installation for the very long storage of products that emit a high heat flux An installation for very long term storage of products emitting a high thermal flux. The installation comprises a container (14), in which the products to be stored are placed, and an evaporator (22) surrounding the container, to evacuate the heat thro... | 03/06/2007 |
| 7158605 | Head assembly A head assembly for a reactor pressure vessel includes a removable closure head, an array of control rod drive mechanisms, a seismic support platform, a missile shield assembly and a cooling system for drawing atmospheric air across electromagnetic coil stack assemb... | 01/02/2007 |
| 7139359 | Integrated head assembly for a nuclear reactor An integrated head assembly (100) is disclosed for a nuclear reactor. The preferred integrated head assembly includes a lift assembly (150) that supports the reactor vessel closure head (90) and integrated head assembly for removal, a separate s... | 11/21/2006 |
| 7077486 | Enclosure for handling hazardous material An enclosure for handling hazardous material includes a sealable housing which is configured with a first air inlet connected to a bubble gauge and a second air inlet disposed inside the housing for air evacuation from the housing is connected to a pump for maintain... | 07/18/2006 |
| 7056053 | Bolting arrangement including a two-piece washer for minimizing bolt bending A two-piece washer to allow tilting movement of the washer elements. One annular washer element includes a convex annular surface that engages with a concave annular surface of a second annular washer element. When the convex and concave surfaces of the respective w... | 06/06/2006 |
| 7030399 | Closure for shielding the targeting assembly of a particle accelerator A closure (10) for shielding, and selectively providing access to, the targeting assembly of a particle accelerator of a radioisotope production system. The closure (10) includes at least one, and in one embodiment, first and second doors (44, 46 | 04/18/2006 |
| 7023962 | Collimator, X-ray irradiator, and X-ray apparatus A collimator comprises a pair of first plate members having X-ray absorbability and a pair of second plate members having X-ray absorbability. The pair of first plate members are movable in a direction parallel to surfaces thereof, and have respective end faces oppo... | 04/04/2006 |
| 6643349 | Method of removing a large-sized apparatus from a reactor building of a nuclear plant In order to carry out a radioactivated reactor pressure vessel from a nuclear reactor building of a nuclear power plant, a first opening portion for carrying out the reactor pressure vessel is provided in a roof of the nuclear reactor building. A radiatio... | 11/04/2003 |
| 6639236 | Radioactive material container A shielded rack loader makes use of a loading rack movable between a shielding structure and a storage tube. A shield plug seals the storage tube. A hoist moves the shield plug and the loading rack. A shield plug cart and a material transfer cart mate wit... | 10/28/2003 |
| 6618460 | Integrated head assembly for a nuclear reactor An integrated head assembly (100) is disclosed for a nuclear reactor. The preferred integrated head assembly includes a lift assembly (150) that supports the reactor vessel closure head (90) and integrated head assembly for removal, a separate support str... | 09/09/2003 |
| 6594333 | Thermal load reducing system for nuclear reactor vessel The present invention is used to reduce thermal load itself, being the cause to generate stress, which develops near liquid surface in a nuclear reactor wall and to contribute to further improvement of safety. A partition member (5) is arranged above a co... | 07/15/2003 |
| 6570950 | Nuclear plant containment with prefabricated component support structure A nuclear steam supply containment system employing prefabricated component supports that are surrounded by steel concrete forms and anchored to the floor liner of a nuclear containment. The prefabricated component supports extend through the concrete for... | 05/27/2003 |
| 6563900 | Ring plate around openings in reinforced concrete containment vessel A reinforced concrete containment vessel in a nuclear reactor includes a cylindrical shell having a side wall. The side wall includes an opening and a plurality of reinforcing bars, at least one of which is interrupted at the side wall opening. A reinforc... | 05/13/2003 |
| 6546066 | Integrated head assembly for a nuclear reactor An integrated head assembly (100) is disclosed for a nuclear reactor. The preferred integrated head assembly includes a lift assembly (150) that supports the reactor vessel closure head (90) and integrated head assembly for removal, a separate support str... | 04/08/2003 |
| 6519308 | Corrosion mitigation system for liquid metal nuclear reactors with passive decay heat removal systems A liquid metal nuclear reactor is described. The reactor includes a concrete reactor silo, and at least one primary vessel located in the reactor silo and coupled to a reactor shield deck. Each primary vessel is substantially surrounded by a containment v... | 02/11/2003 |
| 6492034 | Heat shield In a heat shield (1), in particular for combustion chambers and for thermal fluid flow machines, the heat shield consists of a feltlike material (3) composed of compressed and sintered intermetallic fibers. Advantageously, the intermetallic fibers consist... | 12/10/2002 |
| 6452993 | Method of carrying out large-sized apparatus When a radioactivated reactor pressure vessel is carried out from a nuclear reactor building of a nuclear power plant, a first opening portion for carrying out the reactor pressure vessel is provided in a roof of the nuclear reactor building, a radiation ... | 09/17/2002 |
| 6389094 | Integral forged shroud flange for a boiling water reactor A forged upper shroud section which may be machined from a single piece rectangular cross-section ring forging and includes a circular flange and a cylindrical shell is described. Openings and slots are machined into the flange to align and support the sh... | 05/14/2002 |
| 6353651 | Core catcher cooling by heat pipe A heat removal system for the under reactor pressure vessel area of a boiling water nuclear reactor system that provides both protection of the containment boundary from attack by molten core debris and cools the molten core debris to prevent a breach of ... | 03/05/2002 |
| 6327323 | Multiple reactor containment building A nuclear power plant includes at least two reactor vessels enclosed within a single containment building. In a first embodiment, the reactor vessels and steam generators operate separately from one another. In a second embodiment the reactor vessels join... | 12/04/2001 |
| 6263037 | Cutting zone for radioactive materials An enclosed cutting zone for use in a nuclear power plant. The cutting zone includes a cutting zone barrier and a transfer zone. The cutting zone includes a movable submergible upper rig, an upper inflatable ring supported by the submergible rig; a lower ... | 07/17/2001 |
| 6233300 | Conical shaped seismic guide pins and mating openings A top guide to shroud head interface is described. In one embodiment, the interface includes a top guide that includes a flange that is configured to engage a corresponding flange of the shroud head. The top guide flange includes a plurality of frusto-con... | 05/15/2001 |
| 6195405 | Gap structure for nuclear reactor vessel A gap forming structure for use with water cooled nuclear reactors is invented to prevent overheating and ultimately structurally failing of the lower head of a reactor vessel in a nuclear reactor core meltdown accident by virtue of a cooling effect in th... | 02/27/2001 |
| 6163588 | Core plate and reactor internal pump differential pressure lines for a boiling water reactor A modular differential pressure measuring system for a boiling water nuclear reactor pressure vessel is described. The modular pressure differential system includes a plurality of pressure lines having a plurality of pressure line sections. The system als... | 12/19/2000 |
| 6133661 | Rotating electric machine usable in radioactive environment The invention relates to a rotating electric machine including a coil of a wire having thereon an insulating coating comprising a polybenzimidazole. This rotating electric machine is stably maintained for a long time in dielectric strength even under a hi... | 10/17/2000 |
| 6118838 | Frame-held neutron-absorbing fuel rod assembly storage rack A nuclear fuel rod assembly storage rack comprises a rigid structure delimiting vacant spaces of square, cross-section and neutron-absorbing units also having a square cross-section prearranged before introduction into all or part of the vacant spaces bet... | 09/12/2000 |
| 6093988 | Rotating electric machine usable in radioactive environment The invention relates to a rotating electric machine including (a) a rotor having a rotating shaft; (b) a bearing for supporting the rotating shaft; (c) a radiation resistant grease applied to the bearing; and (d) a shield layer for shielding the grease f... | 07/25/2000 |
| 6091791 | Shroud attachment for a boiling water reactor A shroud attachment assembly which provides both structural support for the shroud and a seal between the shroud and shroud support is described. In one specific embodiment, the shroud attachment assembly includes a shroud flange formed integral with the ... | 07/18/2000 |
| 6067338 | Reactor core shroud repair using thermally tensioned links to apply compression across shroud vertical seam weld An apparatus for repairing the core shroud of a nuclear reactor having one or more cracked vertical seam welds. The repair involves machining two holes in the shroud on opposing sides of the cracked vertical seam weld and then attaching two flexible links... | 05/23/2000 |
| 6064711 | Flak jacket protective cover for spent nuclear fuel storage casks Spent nuclear fuel storage casks, particularly a protective and venting cover for such storage casks which are stored above ground. The protective and venting cover may be assembled from annular or doughnut-shaped cast concrete members stacked one upon th... | 05/16/2000 |
| 6061415 | Missile shield for a nuclear reactor pressure vessel An integrated head assembly for a nuclear reactor pressure vessel includes a closure head with CRDM assemblies extending upwardly from the head. A CRDM seismic support disposed above the closure head provides lateral support for the CRDM assemblies. The s... | 05/09/2000 |
| 6037517 | Apparatus and method for treating waste materials which include charged particle emitters A reaction chamber (20) is charged with a reactant metal (18) which is heated to a molten state by a suitable heating arrangement (21). A field generating arrangement (17) generates a unidirectional electromagnetic field through the molten reactant metal ... | 03/14/2000 |
| 6021170 | Nuclear reactor plant having a reactor pressure vessel with a core barrel and method for mounting the core barrel A nuclear reactor plant includes a reactor pressure vessel having a core barrel supported on a cylindrical holding structure fixed in the reactor pressure vessel. The core barrel has a lower part with at least one elastically resilient segment. A projecti... | 02/01/2000 |
| 6009137 | Mid-shroud joint for a boiling water reactor A mid-shroud joint which improves the replaceability of the shroud is described. In one embodiment, the shroud includes a core shroud and a lower shroud. A core plate support flange is clamped between the core shroud and the lower shroud, and the core pla... | 12/28/1999 |
