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7606344 Containment of a nuclear power plant  
A containment of a nuclear power plant has a pressure chamber, a condensation chamber, and a substantially vertically running condensation tube. The upper end of the tube is connected to the...
7532699 Nuclear facility and method for operating a nuclear facility  
A nuclear facility contains a flood tank, which is provided for holding a cooling liquid, a condensation chamber, and an overflow device, which leads from the flood tank to the condensation chamber...
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...
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 )...
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...
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...
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...
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...
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...
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...
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...
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...
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...
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...
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...
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...
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...
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...
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...
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...
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...
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,...
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...
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...
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...
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...
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...
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...
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...
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...
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...
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...
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...
5367546 Fluid sampling system for a nuclear reactor  
A system of extracting fluid samples, either liquid or gas, from the interior of a nuclear reactor containment utilizes a jet pump. To extract the sample fluid, a nonradioactive motive fluid is...
5351277 Method of constructing top slab of nuclear reactor container and nuclear reactor container constructed by the method  
A method of constructing the top slab of a nuclear reactor container in which a flange for mounting the top head of the container is prepared separately from the sleeve of the container. When the...
5345481 Nuclear reactor plant with containment depressurization  
A boiling-water reactor plant employs a baffle that parallels the interior surface of a thermally-conductive containment wall, defining an intermediate condensate channel. When the plant turbine...
5307388 Containment structures  
A containment structure (1) for storage of nuclear fuel or liquids which have been in contact with nuclear fuel includes a concrete wall (3) and a concrete floor (2) with a corrosion resistant...
5295169 Reactor containment facilities  
A reactor containment facility having a reactor pressure vessel containing a core; a dry well in which the reactor pressure vessel is arranged; a suppression chamber holding suppression-pool water...
5289511 Liquid-metal cooled nuclear reactor  
In a liquid-metal cooled nuclear reactor using liquid metal as a coolant and having vessels and pipings for accommodating the liquid metal coolant, at least pat of the region surrounding a coolant...
5272737 Nuclear reactor installation  
There is disclosed a nuclear reactor installation. An accumulator-type emergency core cooling system, a gravity-driven core cooling system and an equalizing system for submerging a reactor core are...
5267281 Heat exchanger and water tank arrangement for passive cooling system  
A water storage tank in the coolant water loop of a nuclear reactor contains a tubular heat exchanger. The heat exchanger has tubesheets mounted to the tank connections so that the tubesheets and...
5223210 Passive cooling system for liquid metal cooled nuclear reactors with backup coolant flow path  
A liquid metal cooled nuclear fission reactor plant having a passive auxiliary safety cooling system for removing residual heat resulting from fuel decay during reactor shutdown, or heat produced...
5215708 Reactor building assembly and method of operation  
A reactor building assembly includes a pressure vessel within a containment vessel surrounded in turn by first and second enclosures defining respective first and second chambers. A method of...
5211906 Reactor containment vessel  
A pressure control chamber of a reactor containment vessel for receiving the atmosphere of the reactor containment vessel containing leakage steam developing in the event of an accident includes a...
5198184 Reactor containment vessel  
A reactor pressure vessel is disposed in a reactor containment vessel and is supported by a pedestal having a cylindrical structure. The inside of the reactor containment vessel is divided into...
5169596 Large panel design for containment air baffle  
The movable air baffle shield means in accordance with the present invention provides an efficient method of cooling the space surrounding the containment vessel while also providing the capability...
5154877 Passive off-site radiation reduction apparatus  
A method and apparatus for use in conjunction with a passive nuclear reactor containment cooling system to significantly reduce the release of radiation and resulting off-site doses is disclosed....
5122333 Apparatus for eliminating aerosols from air from an escaping nuclear reactor containment vessel  
The apparatus comprises a conduit connected to a containment vessel to supply air to a water bath contained in a basin. The conduit is connected to a plurality of air nozzles in the water bath,...
5119598 Method of construction of top slab for a nuclear containment building  
A method of constructing a top slab to provide a containment roof over a nuclear-power generating building, in particular, a method for utilizing overhead spaces bounded by a wall of the...
5098646 Passive hydraulic vacuum breaker  
The present invention is directed to a nuclear reactor facility wherein a nuclear reactor pressure vessel (RPV) is housed within an annular sealed drywell, an annular sealed wetwell houses said...
Matches 1 - 50 out of 233 1 2 3 4 5 >