Class / Patent application number | Description | Number of patent applications / Date published |
376287000 | Shield or barrier between radiation or heat source and object to be protected (e.g., insulation, thermal shield) | 32 |
20090010376 | TRACK MOUNTED STEAM GENERATOR MAN-WAY RADIATION SHIELD DOOR SYSTEM - The invention consists of placing adequate and useable shielding in the path of the radiation that exists when nuclear workers perform maintenance and inspection of the Pressure Water Reactor Steam Generator component at a nuclear electric generating plant. The shielding has an upper and a lower track member that permit the two shield panel halves to roll easily and be manipulated so that access and the associated work to be performed will result in significant reduction to the typical radiation dose that the workers receive during this work evolution when compared current shielding approach. The shielding includes rollers that roll on track members that are located above and below the man-way opening. | 01-08-2009 |
20090060113 | DEBRIS SHIELD UPPER TIE PLATE FOR NUCLEAR FUEL ASSEMBLY AND METHOD TO SHIELD ASSEMBLY FROM DEBRIS - A nuclear reactor fuel bundle assembly including: a fuel bundle including an array of fuel rods and water rods mounted in an upper tie plate and housed in walls of a channel, and a pore type debris shield mounted at least partially in the channel, above or below the upper tie plate, the shield extending to or over the walls of the channel, whereby deflecting and/or capturing falling debris from entering the fuel assembly, wherein the shield is design to be durable, yet flexible, and porous. | 03-05-2009 |
20090232268 | System and method for operating a modular nuclear fission deflagration wave reactor - Illustrative embodiments provide modular nuclear fission deflagration wave reactors and methods for their operation. Illustrative embodiments and aspects include, without limitation, modular nuclear fission deflagration wave reactors, modular nuclear fission deflagration wave reactor modules, methods of operating a modular nuclear fission deflagration wave reactor, and the like. | 09-17-2009 |
20100008463 | NEUTRON SHIELD - A neutron reactor includes a neutron shield which is disposed outside a nuclear reactor core and adapted to absorb neutrons leaking from the core. The neutron shield includes a plurality of containers each of which contains a powdered neutron absorbing material and which are stacked with one another in a vertical direction, and a cladding tube which houses the containers. The neutron absorbing material is composed of B | 01-14-2010 |
20100119030 | NUCLEAR REACTOR INTERNALS ALIGNMENT CONFIGURATION - An alignment system that employs jacking block assemblies and alignment posts around the periphery of the top plate of a nuclear reactor lower internals core shroud to align an upper core plate with the lower internals and the core shroud with the core barrel. The distal ends of the alignment posts are chamfered and are closely received within notches machined in the upper core plate at spaced locations around the outer circumference of the upper core plate. The jacking block assemblies are used to center the core shroud in the core barrel and the alignment posts assure the proper orientation of the upper core plate. The alignment posts may alternately be formed in the upper core plate and the notches may be formed in top plate. | 05-13-2010 |
20100183112 | METHOD OF MANUFACTURING CORE SHROUD FOR NUCLEAR POWER PLANT AND STRUCTURE OF NUCLEAR POWER PLANT - The present invention provides a method of manufacturing a core shroud for a nuclear plant and a nuclear power plant structure in which a groove portion is easily assembled in the case of manufacturing the core shroud having a weld structure of a nuclear power plant by a laser welding, and it is possible to obtain a weld joint portion in which a plastic distortion region and a residual stress are as small as possible, going with a solidification shrinkage of the weld portion. At a time of welding butted portions of a plurality of members constructing a core shroud, a root face is provided in the butted portion, a length of the root face is set to 25% to 95% of a thickness of the thinner one of the butted portions of a plurality of members, a narrow groove is provided in the other than the root face, and the butted portions are welded by a laser welding using a weld wire. | 07-22-2010 |
20120099694 | FAST REACTOR - A fast reactor | 04-26-2012 |
20160099083 | FAST FLUX SHIELD AND METHOD OF REDUCING FAST NEUTRON FLUENCE AT A CORE SHROUD OF A BOILING WATER REACTOR USING THE SAME - A boiling water reactor core according to an example embodiment may include a core shroud and a plurality of fuel bundles within the core shroud. A plurality of shielding bundles are arranged as a fast flux shield between the plurality of fuel bundles and the core shroud. The plurality of shielding bundles include a metal hydride as a neutron moderator. | 04-07-2016 |
376288000 | Particular materials | 2 |
20120281803 | NEUTRON ABSORBING COMPOSITE FOR NUCLEAR REACTOR APPLICATIONS - A multi-layered material composite is disclosed suitable for nuclear reactor applications to protect equipment from radiation damage. In one embodiment, the composite includes an internal neutron-absorbing layer and an external layer disposed on opposing sides of the internal layer. The external layers are made of metal or ceramic in various embodiments. The composite is disposed on or at least proximate to the an equipment component within the containment chamber of a nuclear reactor in some embodiments to protect the component from radiation damage. | 11-08-2012 |
20150332792 | MEMBER FOR NUCLEAR REACTORS - A member for nuclear reactors is provided with: a core section including an aggregate of graphite particulate matter; and a covering layer including a ceramic dense body that covers the core section. | 11-19-2015 |
376289000 | Thermal insulation | 6 |
20080198960 | NUCLEAR REACTOR VESSEL FUEL THERMAL INSULATING BARRIER - The reactor vessel of a nuclear reactor installation which is suspended from the cold leg nozzles in a reactor cavity is provided with a lower thermal insulating barrier spaced from the reactor vessel that has a hemispherical lower section that increases in volume from the center line of the reactor to the outer extent of the diameter of tiie thermal insulating barrier and smoothly transitions up the side walls of the vessel. The space between the thermal insulating harrier and the reactor vessel forms a chamber which can be flooded with cooling water through passive valving to directly cool the reactor vessel in the event of a severe accident. The passive inlet valve for the cooling water includes a buoyant door that is normally maintained sealed under its own weight and floats open when the cavity is Hooded. Passively opening steam vents are also provided. | 08-21-2008 |
20100098206 | JET PUMP RISER CLAMP - A clamp assembly for securing a thermal sleeve and an elbow in a pipe assembly in a nuclear reactor. The clamp assembly comprises a sleeve clamp adapted to be arranged surrounding the elbow at a first joint between the elbow and a thermal sleeve, and comprising a sleeve support adapted to extend across the first joint. The clamp assembly comprises at least one clamp arm with a first end arranged to rest against at least one of a core shroud and a core plate support ring, to provide support for the positioning of the sleeve clamp. | 04-22-2010 |
20110150165 | NUCLEAR REACTOR MELT ARREST AND COOLABILITY DEVICE - Example embodiments provide a Basemat-Internal Melt Arrest and Coolability device (BiMAC) that offers improved spatial and mechanical characteristics for use in damage prevention and risk mitigation in accident scenarios. Example embodiments may include a BiMAC having an inclination of less than 10-degrees from the basemat floor and/or coolant channels of less than 4 inches in diameter, while maintaining minimum safety margins required by the Nuclear Regulatory Commission. | 06-23-2011 |
20150357054 | NUCLEAR REACTOR SUPPORT AND SEISMIC RESTRAINT WITH IN-VESSEL CORE RETENTION COOLING FEATURES - A nuclear island includes a nuclear reactor, a lateral seismic restraint, and an in-vessel reactor core retention cooling system. The lateral seismic restraint includes a vertically oriented pin attached to one of the bottom of the lower vessel head and the floor underneath the nuclear reactor, and a mating pin socket is attached to the other of the bottom of the lower vessel head and the floor. The in-vessel reactor core retention cooling system includes one or more baffles, optionally thermally insulating material, disposed alongside the exterior surface of a lower portion of the reactor pressure vessel including at least the lower vessel head. A plenum is defined between the one or more baffles and the exterior surface of a lower portion of the reactor pressure vessel. The one or more baffles may define a lower plenum inlet surrounding the lateral seismic restraint. | 12-10-2015 |
20150364221 | ACCELERATOR-DRIVEN SUBCRITICAL REACTOR SYSTEM - Now disclosing previously undisclosed aspects of the original accelerator-driven sub-critical reactor, whose since-then familiar parts and operation was first disclosed publicly starting in 1990: a more efficient accelerator-driven system is proposed which fully and completely implements the fundamental insights of the original invention and which realizes then a completely next-generation and practical and wave energy processing system, departing fundamentally from thermal-conversion/turbine based systems and moving much more completely to a fusion-like paradigm, as was originally conceived. Departing fundamentally from the conventional energy processing paradigm, proposed are more efficient energy collection and conversion systems “directly” collecting particle flows and wave radiation, converting them more efficiently to usably power for distribution, and recycling flows required for the accelerator-driven system. Thus, by those greater net efficiencies, thereby enabling a wider range of feedstock/fuel types and cycles generalized, while also providing: 1) a significantly more efficient Thorium-cycle system, in one configuration, 2) a more energy-productive nuclear waste reduction system, in another configuration, 3) accelerator driven systems for other fertile-fission candidate elements, and 4) which may be applied to fusion systems (substituting the fission unit in the proposed system class and category) in a way that may lower the break-even point for such systems and thus make the advent of practical fusion sooner than otherwise possible. 5) In addition and importantly, an optical-power processing and distribution is also enabled by the proposed, providing both optical power as base power for telecom, process energy for industrial uses, and lighting and other wavelengths for consumer and general business use. | 12-17-2015 |
376290000 | For liquid metal cooled fast reactors (e.g., insulation for vault roof, or for the vessel walls as by a layer of stagnant or quasi-stagnant coolant) | 1 |
20100172459 | FAST REACTOR - A fast reactor has: a reactor vessel containing a coolant; a reactor core housed in the reactor vessel; a core supporting plate; a reflector; a partition arranged to surround the reflector on the side of the reactor vessel, for forming a passage of the coolant; a thermal shield arranged to cover at least one of the core side and the reactor vessel side of the partition; and a neutron shield. The thermal shield is mounted on the partition. The thermal shield includes a metallic thermal shield plate and a heat insulator mounted in the thermal shield plate, and has its inside filled with an inert gas. By the thermal shield, the thermal insulation of the partition can be improved to suppress the heat exchange between primary coolants on the core side and on the side of the reactor vessel of the partition. | 07-08-2010 |
376293000 | Containment structures | 16 |
20090238321 | Nuclear power plant with actinide burner reactor - A nuclear reactor includes a coolant and a core. The core includes a moderator material and a plurality of fuel assemblies arranged within the moderator material, each fuel assembly including an inner region and an outer region surrounding the inner region. The inner region includes at least one first fuel structure containing at least one byproduct actinide, and the outer region includes a plurality of second fuel structures containing thermal spectrum driver fuel, the second fuel structures being less than one thermal neutron mean free path apart. Other embodiments are also provided, as is a nuclear power plant and a fuel assembly. | 09-24-2009 |
20100124304 | SEISMICALLY ISOLATED CONTAINMENT VESSEL - A power module includes a containment vessel completely submerged in a pool of liquid,and a support structure located at or above an approximate midpoint of the containment vessel, or center of gravity of the power module. The power module is supported by the support structure in combination with a buoyancy force of the pool of liquid acting on the containment vessel. | 05-20-2010 |
20100296618 | EXPANSION GAP RADIATION SHIELD - An expansion gap radiation shield is formed from a flexible container housing a radiation shielding fluid, that is located within a variable gap in permanent shielding. The invention reduces radiation dose rates outside the gap when the radiation sources are located on the opposite side of the gap. The device accommodates varying gap sizes with no loss of shielding capability. | 11-25-2010 |
20110194665 | STEEL CONCRETE STRUCTURE FOR REACTOR CONTAINMENT FACILITY - The present invention allows to inhibit antiplane deformation of steel plates due to the back pressure generated by water content of the concrete, and allows observation of the concrete during a service period. | 08-11-2011 |
20120177168 | PASSIVE EMERGENCY FEEDWATER SYSTEM - A power module assembly may include a reactor vessel containing a primary coolant and one or more inlets configured to draw a secondary coolant from the containment cooling pool in response to a loss of power and/or a loss of coolant. One or more outlets may be submerged in the containment cooling pool and may be configured to vent the secondary coolant into the containment cooling pool. A heat exchanger may be configured to remove heat from the primary coolant, wherein the heat may be removed by circulating the secondary coolant from the containment cooling pool through the heat exchanger via natural circulation. | 07-12-2012 |
20120236979 | NUCLEAR REACTOR MODULE - A part-built nuclear reactor module | 09-20-2012 |
20120321029 | ELECTRICAL PENETRATION ARRANGEMENT FOR THE CONNECTION OF ELECTRICAL DEVICES IN CONTAINMENT STRUCTURES - An electrical penetration arrangement through the wall of a containment structure, comprising a pipe penetration having a pipe which is disposed in the wall of a containment structure, penetrating the wall, so that a first opening of the pipe is disposed outside of the containment structure, and a second opening is disposed inside the structure. Power feedthroughs are disposed in the pipe penetration having conductors sealed along their axial direction by a hermetically sealing, electrically insulating material, in which cables coming from outside can be connected to first conductor ends, and cables coming from inside the containment structure can be connected to second conductor ends. Power feedthroughs are fastened in the pipe of the pipe penetration and sealed by hermetically sealing material, so that the power feedthroughs form a hermetically sealing barrier, and the first conductor ends are disposed in the interior of the pipe. | 12-20-2012 |
20130182813 | INTEGRAL PRESSURIZED WATER REACTOR WITH EXTERNAL STEAM DRUM - A pressurized water reactor (PWR) includes: a pressure vessel divided into an upper plenum containing primary coolant, a lower plenum containing primary coolant, and a steam generator plenum interposed between the upper plenum and the lower plenum and containing secondary coolant; a nuclear reactor core comprising fissile material disposed in the lower plenum; one or more risers arranged to convey primary coolant upward from the nuclear reactor core to the upper plenum; and a plurality of tubes passing through the steam generator plenum and arranged to convey primary coolant downward from the upper plenum to the lower plenum. A steam separator is operatively connected with the steam generator plenum to separate secondary coolant in the steam phase from secondary coolant in the water phase. | 07-18-2013 |
20130259184 | CONTAINMENT VESSEL AND NUCLEAR POWER PLANT - A containment vessel has an inner shell covering a reactor pressure vessel and an outer shell forming an outer well which is a gas-tight space covering the horizontal outer periphery of the inner shell. The inner shell has a first cylindrical side wall surrounding the horizontal periphery of the reactor pressure vessel, a containment vessel head which covers the upper part of the reactor pressure vessel, and a first top slab connecting in a gas-tight manner the periphery of the containment vessel head and the upper end of the first cylindrical side wall. The outer shell has a second cylindrical side wall surrounding the outer periphery of the first cylindrical side wall, and also has a second to slab connecting in a gas-tight manner the vicinity of the upper end of the second cylindrical side wall and the first cylindrical side wall. | 10-03-2013 |
20140254739 | Head Module, Large-scale Container and Method for Manufacturing the Both - A head module for a large-scale container, a large-scale container having the head module, and methods for manufacturing the head module and the large-scale container. The method for manufacturing a head module comprises providing a head having an annular opening, the head being composed of a plurality of petals, providing a plurality of cylinder plates, and forming a head cylindrical ring, connecting in order the plurality of cylinder plates to the end surface of the annular opening and joining facing sides of all adjacent cylinder plates. Based on the unfitness of the petals at the annular opening of the head, gaps between adjacent cylinder plates may be adjusted, and/or the positions of the cylinder plates on the end surface of the annular opening of the head may be adjusted radially inwards or outwards. | 09-11-2014 |
20140321595 | SUBMERGED OR UNDERWATER ELECTRICITY PRODUCTION MODULE - The submerged or underwater electricity production module according to the invention, of the type including means in the form of an elongated cylindrical box ( | 10-30-2014 |
20150357060 | PASSIVE FILTRATION OF AIR EGRESSING FROM NUCLEAR CONTAINMENT - A nuclear reactor includes a reactor core comprising fissile material disposed in a reactor pressure vessel. A radiological containment contains the nuclear reactor. A containment compartment contains the radiological containment. A heat sink includes a chimney configured to develop an upward-flowing draft in response to heated fluid flowing into a lower portion of the chimney. A fluid conduit is arranged to receive fluid from the containment compartment and to discharge into the chimney. A filter may be provided, with the fluid conduit including a first fluid conduit arranged to receive fluid from the containment compartment and to discharge into an inlet of the filter, and a second fluid conduit arranged to receive fluid from an outlet of the filter and to discharge into the chimney. As the draft is developed passively, there is no need for a blower or pump configured to move fluid through the fluid conduit. | 12-10-2015 |
376294000 | Pressure vessels | 4 |
20090310732 | Method for manufacturing a pressure vessel of a pressurized-water reactor of a nuclear power station a pressure vessel of a pressurized-water reactor of a nuclear power station and use of a multiwalled pressure vessel for the above purpose - The invention relates first of all to a method for manufacturing a pressure vessel of a pressurized-water reactor of a nuclear power station, which pressure vessel comprises a pressure resistant casing and which is being used filled with a medium in high pressure in order to utilize heat, being generated as a result of a nuclear reaction taking place in an internal space ( | 12-17-2009 |
20100067644 | Thorium-based nuclear reactor and method - A nuclear reactor and method for generating energy from fertile and fissile nuclear fuel material. The reactor may comprise a pressure vessel for housing a nuclear reactor core, the vessel having a lower vessel with an upwardly facing opening and a vessel closure head having a sealable access port. The vessel closure head may be positionable in differing positions relative to the lower vessel so that differing portions of the interior of the pressure vessel may be accessed through the access port. The lower vessel may include penetrations for lateral insertion of one or more reactor control blades into the interior of the lower vessel. The reactor core may comprise an inner driver region having substantially fissile nuclear fuel material, a breeder region substantially surrounding the driver region and having substantially fertile nuclear fuel material, a moderator substantially surrounding the breeder region, and a distal burner region having substantially fissile nuclear fuel material with higher fission product concentration than the driver region and being adaptable to receive neutrons from the driver and breeder regions. Generated heat from nuclear fuel in the reactor core may be removed by a gaseous coolant whereby the heated coolant is utilized to maintain the temperature of the moderator. | 03-18-2010 |
20100124305 | COVERING ELEMENT FOR A REACTOR CORE OF A NUCLEAR INSTALLATION, AND NUCLEAR REACTOR - A covering element for a reactor core of a nuclear installation provides a secure and tight closure of the reactor core in an operating state and at the same time being simple and cost effective to produce. The covering element is easily disassemblable during maintenance or loading processes and provides good possibilities for intervention in the reactor core. For this purpose, the covering element has a closure head and a separate support ring. The support ring is joined form-lockingly and/or force-lockingly to the closure head. | 05-20-2010 |
20100177859 | NUCLEAR REACTOR BUILDING AND CONSTRUCTION METHOD THEREOF - In a nuclear reactor building of a steel plate concrete structure that houses a pressure containment vessel formed with a plurality of penetration ports penetrating the pressure containment vessel on the periphery thereof and includes a biological shielding wall disposed outside the pressure containment vessel. The pressure containment vessel is vertically divided into a plurality of blocks so that each of the blocks has one or more pressure containment vessel penetration ports arranged on a same horizontal plane, and the reactor building including the biological shielding wall is divided into a plurality of modules by the horizontal plane. | 07-15-2010 |