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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...
7558360 Core catcher cooling  
An assembly includes a base grid configured to be disposed below a pressure vessel and spaced vertically above a floor of a containment vessel to define a sump therebetween. The assembly further...
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...
7492851 Clamp for feedwater sparger end bracket assemblies and method of preventing separation of feedwater sparger end bracket assemblies  
A constrained feedwater sparger end bracket assembly comprises a boiling water reactor vessel, a feedwater sparger including a conduit within the vessel, a feedwater sparger end bracket assembly...
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 ),...
7136449 Nuclear reactor plant  
The invention provides a cooling system which includes at least one and preferably a plurality of coolant chambers arranged around a heat source, typically a nuclear reactor. A coolant inlet pipe...
6945272 Passively actuated valve  
A passively actuated valve for isolating a high pressure zone from a low pressure zone and discontinuing the isolation when the pressure in the high pressure zone drops below a preset threshold. If...
6895068 Method for providing a pressurized fluid  
In order, in a pressure accumulator, to generate a required operating pressure of a fluid situated in the pressure accumulator, a heater device is provided, disposed in an upper region of the...
6885720 Modular reactor containment system  
A compact metal containment vessel, for a boiling water nuclear reactor, includes in one exemplary embodiment, a bottom head, a removable top head, and a substantially cylindrical sidewall...
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...
6718001 Nuclear reactor  
In an indirect cycle nuclear reactor, a size of the reactor containment vessel is decreased by removing decay heat inside the reactor pressure vessel without using any active component to improve...
6618461 Systems and methods to enhance passive containment cooling system  
A nuclear reactor containment cooling system includes a containment vessel having a drywell and a wetwell, a cooling condenser submerged in a cooling pool of water located outside the containment...
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...
6477220 Flexible penetration attachment for strainers  
A flexible penetration attachment for BWR wet-well strainers is provided that causes a suction pipe to communicate with liquid in the wet-well through an aperture in a wet-well wall. The...
6397877 Blowdown manifold evacuator for nuclear power plants  
A blowdown manifold for a nuclear power plant includes a main conduit section, at least one coolant exhaust conduit, and at least one fluidic device. The main conduit section is connected to a...
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...
6351936 Device for elimination of hydrogen  
A device for elimination of hydrogen including (a) a reactor for reacting hydrogen and oxygen, the reactor being provided with a first inlet line, a second inlet line and an outlet line, the first...
6351510 Nuclear plant  
A nuclear power plant comprising a casing which encloses a primary space, a reactor vessel arranged in the primary space, and a reactor core provided in the reactor vessel. The plant further...
6333956 Blow-off device and method of blowing off live steam  
A blow-off device for live steam includes a filter for radioactive substances in order to increase operational safety in a nuclear power plant. The filter is preferably integrated in a housing of a...
6311897 Passive pulse generator and method for activating a fitting with a passive pulse generator  
A passive pulse generator can be connected to a line in order to activate a safety fitting in a nuclear power plant. The line can be closed by a closure element. In the event of a temperature...
6249561 Combination containment cooling and residual heat removal condenser system for nuclear reactors  
Combination primary containment cooling system and residual heat removal steam condensers (PCCS-CND) operable in a containment cooling mode and in a reactor vessel cooling mode are described. In...
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...
6195406 Spray lines for a pressurizer of a pressured water reactor  
A pressurizer includes a casing in which at least one spray line ends. The spray line is guided through a wall in a lower region of the casing and is disposed in such a way as to run upward inside...
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...
6185268 Main steam pressure disturbance preventing apparatus of nuclear power plant  
A main steam pressure disturbance preventing apparatus of a nuclear power plant including, one of a pressure detector and a water level detector provided in one of a steam system from a reactor of...
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...
6097778 Gravity driven suction pump system, methods, and apparatus  
A gravity driven suction pump for a nuclear reactor condenser is described. The gravity driven suction pump is utilizes the potential energy of the condenser condensate to move condensible and...
6088418 Pool pressure mitigation using sparger phase interaction  
A method and apparatus for mitigating oscillatory pressure disturbances that result from venting steam from a nuclear reactor into a pressure suppression pool through a plurality of spargers is...
6071482 Device for cooling and intermixing of gas from accidental leaks  
A device for the cooling and intermixing of gas from accidental leaks, such as from a nuclear reaction containment, i.e., accident atmospheres, which device prevents stratification and provides...
6069930 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 passive containment cooling system (PCCS), in one form, includes a vent...
6026138 Method and device for safeguarding the discharge of residual heat from a reactor of a nuclear power station  
A method for safeguarding discharge of residual heat from a nuclear power station reactor upon a lowered filling level in a primary circuit of a reactor cooling system, includes initially shutting...
5943384 Depressurization system for pressurized steam operated plant  
A depressurization system (1) for pressurized steam operated plant employing injection of cold water contained in a superelevated tank (5), said injection being triggered rapidly and in a manner...
5898749 Steam blowing assembly for nuclear power plants  
The invention relates to a steam blowing tube for nuclear power plants of the kind which has a lower end immersed in a water pool, the purpose of tube being to permit, if required, the blow down of...
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...
5896431 Systems and methods for preventing steam leakage between a drywell and a wetwell in a nuclear reactor  
Systems, methods, and apparatus for preventing steam leakage between a drywell and a wetwell in a nuclear reactor are described. In accordance with one embodiment of the present invention, the...
5872825 Apparatus and method for inerting and venting the containment atmosphere in a nuclear power station  
When hydrogen is generated within the containment of a nuclear power station, its containment atmosphere must be inerted. An undesired pressure buildup within the containment is prevented during...
5802128 Device for recovery of fluid contained in the coolant circuit of a nuclear reactor  
The recovery device includes a first tank containing a volume of water open in the inner space of the safety containment and a closed second tank isolated from the inner space of the safety...
5796798 Internal condenser vapor discharge system  
Internal condenser system for discharging vapor from a circuit into a tank or pool to reduce pressure in said circuit. The internal condensation conduit (47) comprises a diaphragm (52) just...
5761262 Passive containment cooling system of nuclear reactor  
A passive containment cooling system for a nuclear reactor and a method of cooling a pressurized water reactor thereby has an isolation condensing means for cooling and condensing steam and...
5761261 Ruptured disc accumulator  
A nuclear power plant has a cooling system that operates under a variety of temperature and pressure conditions. A storage container is provided to allow expansion of fluid within the cooling...
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...
5699394 Thermal insulating barrier and neutron shield providing integrated protection for a nuclear reactor vessel  
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...
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...
5661769 Depressurising system for plants operating with pressurized steam  
A depressurizing system (1) for depressurizing plants, operating with pressurized steam and including a steam head (16), by injection of cold water under gravity from a reservoir (2) located at a...
5642389 Light water reactor in particular a boiling water reactor with a high degree of inherent safety  
A light water reactor, in particular a boiling water reactor, includes a reactor pressure vessel having an interior, a core disposed in a lower half of the pressure vessel, fuel assemblies disposed...
5596613 Pressure suppression containment system for boiling water reactor  
A system for suppressing the pressure inside the containment of a BWR following a postulated accident. A piping subsystem is provided which features a main process pipe that communicates the...
5570401 BWR containment configuration having partitioned wetwell airspace  
An improved containment configuration for a boiling water reactor in which the wetwell airspace is divided into a multiplicity of chambers through the use of wetwell airspace divider partitions....
5517538 Safety device protecting a nuclear reactor pressure vessel against overpressure failure  
A nuclear reactor has a pressure vessel with an interior, a coolant conducting surface, such as a wall of the pressure vessel or a line passing through the wall of the pressure vessel, a pressure...
5511102 Apparatus for draining lower drywell pool water into suppresion pool in boiling water reactor  
An apparatus which mitigates temperature stratification in the suppression pool water caused by hot water drained into the suppression pool from the lower drywell pool. The outlet of a spillover...
Matches 1 - 50 out of 222 1 2 3 4 5 >