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| Number | Title | Issue Date |
| 8126107 | Nuclear engineering plant and closure apparatus for its containment A nuclear engineering plant has a containment, whose interior chamber is subdivided by a wall into a systems chamber and an operating chamber which is accessible during normal operation. The containment ensures a particularly high operational reliability, in particu... | 02/28/2012 |
| 7684535 | Reactor containment vessel A reactor containment vessel of the present invention has a primary reactor containment vessel disposing a dry well for storing a reactor pressure vessel, a wet well for storing a pressure suppression pool, and an equipment room disposing below said pressure suppres... | 03/23/2010 |
| 7342989 | Apparatuses and methods for mechanical shielding and cooling A transport or storage cask comprises a cask body, a modular thermal conducting and shielding system and a mechanical attachment. The modular thermal conducting and shielding system includes a modular fin and a modular neutron shield. The mechanical attachment retai... | 03/11/2008 |
| 7340387 | Control rod driving simulator for verification of control rod driving mechanism control system of atomic power plant A control rod driving simulator has a control rod driving unit having a plurality of coil members vertically mounted therein, a control rod mounted vertically movably through the centers of the coil members, a cart having a reserve tank storing cooling water, a cool... | 03/04/2008 |
| 7334467 | Air data module that ensures sufficient air data performance after exposure to relatively high overpressure An air data module is provided that is relatively small, lightweight, low cost, uses relatively low power, and is relatively easy to install, test, and maintain. The air data module includes a housing that is adapted to be mounted to an external surface of an aircra... | 02/26/2008 |
| 7245030 | Integrated generator and transformer and associated methods An electrical power generating apparatus (20) may include a housing (22), an electrical generator (24) within the housing, and a step-up transformer (30) within the housing and connected to the electrical generator. A turbine (26) ... | 07/17/2007 |
| 7245688 | Cooling system This invention relates to a nuclear reactor plant which includes a nuclear heat source (12), and a cooling system (10). The cooling system (10) includes at least two cooling circuits (26), each of which includes a plurality of coolant cha... | 07/17/2007 |
| 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 |
| 6902611 | Heat dissipating coating and method for decreasing the inner temperature of buildings and similar constructions A heat-dissipating aqueous coating composition and a method for making more comfortable the inner temperature of buildings, housings and the like, by applying a thin layer of said aqueous composition on the exterior surfaces of roofs and walls, which composition dis... | 06/07/2005 |
| 6891913 | Nuclear storage overpack door actuator and alignment apparatus The invention is a door actuator and alignment apparatus for opening and closing the 15,000-pound horizontally sliding door of a storage overpack. The door actuator includes a ball screw mounted horizontally on a rigid frame including a pair of door panel support ra... | 05/10/2005 |
| 6839396 | Control device for a cooling circuit Control device for a cooling circuit which enables a pressure tank of a reactor to be cooled even when a serious failure occurs, without having to resort to the use of external energy. One or more rods is disposed below a bottom cap of the reactor pressure tank. Eac... | 01/04/2005 |
| 6810099 | Boiling water reactor nuclear power plant and its construction method The present invention provides a boiling water reactor nuclear power plant in which a reactor core support plate, upper grid plate, and a reactor core consisting of fuel assemblies supported by these plates are provided in the inner base portion of a nuclear reactor... | 10/26/2004 |
| 6795518 | Integral PWR with diverse emergency cooling and method of operating same Passive emergency cooling in response to a loss of coolant accident (LOCA) in a PWR, having an integral reactor pressure vessel incorporating the steam generators and housed in a small high pressure containment vessel, is provided by circulating cooling water throug... | 09/21/2004 |
| 6757351 | Modified large natural circulation reactor The present invention, in one form, is a natural circulation reactor having, in one embodiment, a layer of high aluminate cement concrete disposed between an uninsulated steel liner and a prestressed concrete reactor vessel. The prestressed concrete reactor vessel i... | 06/29/2004 |
| 6639960 | Method of retrofitting a reactor pressure vessel head assembly A head assembly of a reactor pressure vessel in an ice condenser plant is retrofitted to permit the assembly to be removed during a later refueling operation in reduced time and with reduced exposure to radiation by operating personnel. The portions of th... | 10/28/2003 |
| 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 |
| 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 |
| 6426986 | Forged nozzle shell course for a pressure vessel A forged nozzle shell course for a pressure vessel includes shell course comprising at least one reinforcement portion extending radially outward from an outer surface of the shell course with each reinforcing portion including a nozzle having a radius. T... | 07/30/2002 |
| 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 |
| 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 |
| 6246739 | Passive aerosol retention apparatus Passive aerosol retention apparatus positioned in the connecting vents of a nuclear reactor containment are described. The aerosol retention apparatus minimizes aerosol transport from the lower drywell to the upper drywell of the reactor containment. The ... | 06/12/2001 |
| 6243432 | Modified passive containment cooling system for a nuclear reactor Modified passive containment cooling systems for cooling a reactor core of a boiling water nuclear reactor are described. The reactor core is positioned in a reactor pressure vessel which is located in a drywell of the nuclear reactor. The passive contain... | 06/05/2001 |
| 6185269 | Liquid metal reactor power block A seismically isolated liquid metal reactor power block is described. In one embodiment, the liquid metal reactor power block is a substantially rectangular nuclear plant with two nuclear islands and a common liquid metal service facility commonly support... | 02/06/2001 |
| 6173027 | Primary containment vessel A primary containment vessel comprises an outer peripheral concrete wall surrounding a reactor pressure vessel, a pipe arrangement of a reactor water recirculation system and other reactor systems and equipments, a mat concrete wall positioned below the o... | 01/09/2001 |
| 6160864 | Seismic isolators A seismic load suppressing system for a nuclear reactor that reduces the seismic input to the reactor and the internal components of the reactor including the fuel is described. The seismic load suppressing system includes, in one embodiment, a plurality ... | 12/12/2000 |
| 5930320 | Assemblies and methods for mitigating effects of reactor pressure vessel expansion Support assemblies for allowing RPV radial expansion while simultaneously limiting horizontal, vertical, and azimuthal movement of the RPV within a nuclear reactor are described. In one embodiment, the support assembly includes a support block and a guide... | 07/27/1999 |
| 5898748 | Vacuum breaker valve assembly Breaker valve assemblies for a simplified boiling water nuclear reactor are described. The breaker valve assembly, in one form, includes a valve body and a breaker valve. The valve body includes an interior chamber, and an inlet passage extends from the c... | 04/27/1999 |
| 5781603 | Method and apparatus for repair of nuclear reactor shroud In order to support a shroud against bending, shear, stress and torsion, straps which are preferably formed of the same material as the shroud, are placed in strategic positions with respect to cracks or the like type of weaknesses which have been detecte... | 07/14/1998 |
| 5748690 | Construction method of nuclear reactor reinforced concrete containment vessel and diaphragm floor structure of nuclear reactor reinforced concrete containment vessel In a method of construction of a reinforced concrete diaphragm floor of a nuclear reactor reinforced concrete containment vessel, a bottom surface of the diaphragm floor is provided in the form of an iron plate. The iron plate, an iron bar beam portion fo... | 05/05/1998 |
| 5740216 | Vertical seismic isolation structure of common deck system for nuclear reactor components A vertical seismic isolation structure is capable of achieving vertical seismic isolation of nuclear reactor components connected to each other by primary pipings, while suppressing the relative displacement with respect to the primary pipings. A nuclear ... | 04/14/1998 |
| 5717731 | Outage cover for nuclear reactor containment vessel A circular outage cover of light-weight composite material is normally situated in a standby position adjacent to the opening at the outer end of the equipment access tunnel of a nuclear reactor containment vessel. In case of an emergency during an outage... | 02/10/1998 |
| 5706320 | Containment pressure suppression system for liquid metal cooled reactors A pressure suppressing and aerosol scrubbing system configured to be located between low pressure upper containments associated with modular reactor vessels is described. In one embodiment, the pressure suppression and scrubbing system includes a water ta... | 01/06/1998 |
| 5684846 | Nuclear reactor plant having containment isolation A nuclear reactor plant has a nuclear reactor vessel in a containment vessel. Air ducts, sump discharge lines, service water lines and other non-process non-critical lines extending through the wall of the containment vessel can be isolated passively (i.e... | 11/04/1997 |
| 5673528 | Safety wall for a building A wall, particularly a wall of a containment for a nuclear plant, a pool or a cavern, includes a bearing wall. A sealing element is disposed on at least one surface of the bearing wall and covers the bearing wall. A protective wall covers the sealing elem... | 10/07/1997 |
| 5577085 | Boiling water reactor with compact containment and simplified safety systems A nuclear reactor having a pressure vessel which is open at the top. The open top of the pressure vessel is closed by a steel dome. A containment, which is open at the top, extends upward from and is joined to the top of the pressure vessel and has an ope... | 11/19/1996 |
| 5495511 | Device for passively inerting the gas mixture in the reactor containment of a nuclear power plant A device for passively inerting the gas mixture forming in the reactor containment of a nuclear power plant in an accident situation is proposed, which device is based on the use of chemical substances which react or disintegrate, releasing an inerting ga... | 02/27/1996 |
| 5488643 | Method and apparatus for supporting a shroud in a nuclear reactor In order to eliminate the need to weld, drill or otherwise machine a shroud structure which is used to surround a plurality of fuel assemblies in a nuclear reactor, a plurality of upper hanger rods interconnect a structure above the shroud to a support ri... | 01/30/1996 |
| 5406602 | Passive air cooling of liquid metal-cooled reactor with double vessel leak accommodation capability A passive and inherent shutdown heat removal method with a backup air flow path which allows decay heat removal following a postulated double vessel leak event in a liquid metal-cooled nuclear reactor. The improved reactor design incorporates the followin... | 04/11/1995 |
| 5388130 | Steam generator located outside nuclear power plant primary containment The Pressurized Water Reactor (PWR) plant steam generators, which are normally located inside the primary containment, are located outside, in separate structures. This arrangement provides for the removal or repair of the individual "leaky" steam generat... | 02/07/1995 |
