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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...
7526057 Decay heat removal system for liquid metal reactor  
A decay heat removal system for a liquid metal reactor in which a decay heat exchanger (DHX) is installed concentrically with an intermediate heat exchanger (IHX) in the same cylinder which...
7522693 Passive safety-grade decay-heat removal method and decay-heat removal system for LMR with pool direct heat cooling process  
A direct pool cooling type passive safety grade decay heat removal method and system for removing core decay heat in a pool type liquid metal reactor when a normal heat removal system breaks down....
7308070 Stable and passive decay heat removal system for liquid metal reactor  
A decay heat removal system for a liquid metal reactor, in which a decay heat exchanger (DHX) is installed concentrically with an intermediate heat-exchanger (IHX) in the same cylinder which...
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 ),...
7222058 Method of modeling and sizing a heat exchanger  
A method of modeling a heat exchanger is disclosed and comprises assigning input temperatures, assumed output temperatures, and a set of flow rates, inputting the parameters into a set of equations...
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...
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...
6269873 Method for controlling heat exchange in a nuclear reactor  
A method for controlling heat exchange in a nuclear reactor. The reactor contains at least one thermal valve, at least one heat exchanger having a coolant flowing therein, with the heat exchanger...
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...
6160863 Variable speed pump for use in nuclear reactor  
A nuclear reactor coolant system includes a primary coolant circuit connected to a secondary coolant circuit. A desired amount of coolant is bled from the primary circuit to the secondary circuit...
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...
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...
5887043 Passive emergency water system for water-cooled nuclear reactors  
A passive emergency water system for cooling the atmosphere inside containment in a water-cooled nuclear reactor comprises an elevated in-containment water reservoir connected to an in-containment...
5828714 Enhanced passive safety system for a nuclear pressurized water reactor  
A passive safety system for a nuclear reactor coolant system including a water storage tank, a heat exchanger positioned within the water storage tank and connected to the hot leg, and a core...
5825838 Reactor flooding system for a retaining molten core materials in a reactor vessel by the improved external vessel cooling capability  
A reactor cavity flooding system, which is used to immerse the hemispherical lower head of a nuclear reactor vessel by flooding the reactor cavity, is connected to both coolant injection nozzles...
5790619 Drain system for a nuclear power plant  
A drain system for a shutdown cooling system of a pressurized water reactor type of a nuclear power plant (10) has an increased flow rate in the drain pipe (28) and drain pump (33). The hot leg...
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...
5748693 Safety feed for borating system for a pressurized water reactor and process for operating such a system  
In the event of an incident in a pressurized water reactor with a safety feed and borating system, it is necessary that sufficient primary cooling water be available in the reactor cooling system...
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...
5694442 System for passively dissipating heat from the interior of a nuclear reactor containment structure  
A system (10) for dissipating heat from the interior space (50) of a containment structure (3, 6) for a nuclear reactor (2), for an indefinite time period, comprises a first heat exchanger (15,...
5659591 Containment spray system for a light-water reactor  
A containment spray system for a light-water reactor includes a water trough being disposed in a safety tank. An immersion pump disposed in the vicinity of the bottom of the water trough, a spray...
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...
5612982 Nuclear power plant with containment cooling  
A passive nuclear power plant includes a reactor vessel enclosed by a containment shell. An in-containment cooling system piped with an out-of-containment heat sink, includes an in-containment heat...
5579355 Heat dissipation system for a nuclear reactor, in particular a pressurized water reactor  
A nuclear reactor, in particular a pressurized water reactor, has a containment, a containment shell surrounding the containment and a concrete construction of a reactor building surrounding the...
5517539 Method of decontaminating a PWR primary loop  
In a method of decontaminating a primary loop of a pressurized water reactor, including a steam generator, reactor coolant pump and hot and cold legs in the loop, the primary loop is isolated from...
5499278 Water inventory management in condenser pool of boiling water reactor  
An improved system for managing the water inventory in the condenser pool of a boiling water reactor has means for raising the level of the upper surface of the condenser pool water without adding...
5499277 Method and apparatus for enhancing reactor air-cooling system performance  
An enhanced decay heat removal system for removing heat from the inert gas-filled gap space between the reactor vessel and the containment vessel of a liquid metal-cooled nuclear reactor. Multiple...
5469480 Mid-loop operating method for nuclear power plant, and facility therefor  
The currently used atomic reactors has to be refueled periodically. During this refueling, the checking and repair of the major sections of the atomic reactor are carried out, and therefore, a low...
5461648 Supercritical water oxidation reactor with a corrosion-resistant lining  
A supercritical water oxidation reactor includes a vessel with an interior urface, two cooling sections, a heat exchanger, an oxygenating section, a pump, and a trap. The interior surface of the...
5428652 Secondary-side residual-heat removal system for pressurized-water nuclear reactors  
A pressurized water reactor residual heat extraction system uses the secondary cooling circuit to extract the residual heat in certain operating and malfunction conditions. A steam generator (D1)...
5426681 Boiling water reactor with combined active and passive safety systems  
A boiling water reactor having an optimum combination of active and passive safety systems. By combining three active divisions (I,II,III)of the boiling water reactor with a passive fourth...
5414743 Secondary-side residual-heat removal system for pressurized-water nuclear reactors  
A secondary-side residual-heat removal system for a pressurized-water reactor removes residual heat through a secondary side of a steam generator in certain modes of operation and malfunction. For...
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...
5392324 Device for and method of removing the residual power from a fast-neutron nuclear reactor at shutdown  
The nuclear reactor includes a fuel core (5) inside a vessel (2) and a system (1) for cooling the core (5), in which a liquid metal circulates and on which is placed at least one steam generator...
5377243 Passive containment cooling system with drywell pressure regulation for boiling water reactor  
A boiling water reactor having a regulating valve for placing the wetwell in flow communication with an intake duct of the passive containment cooling system. This subsystem can be adjusted to...
5360056 Temperature initiated passive cooling system  
A passive cooling system for cooling an enclosure only when the enclosure temperature exceeds a maximum standby temperature comprises a passive heat transfer loop containing heat transfer fluid...
5353318 Pressure suppression system  
A pressure suppression system includes a containment vessel surrounding a reactor pressure vessel and defining a drywell therein containing a non-condensable gas. An enclosed wetwell pool is...
5349617 Apparatus for removing the residual power of a pressurized nuclear reactor core  
A pressured-water nuclear reactor comprising an apparatus for directly removing the residual power from the core of the reactor is provided. Advantageously, upon shut-down of the nuclear reactor of...
5345482 Passive containment cooling water distribution device  
A passive containment cooling system for a nuclear reactor containment vessel. Disclosed is a cooling water distribution system for introducing cooling water by gravity uniformly over the outer...
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...
5343507 Shutdown cooling system for operation during lapse of power  
A shutdown cooling system for a nuclear reactor operates during lapse of normal power and emergency power and has an independent power source fo removing residual heat while cooling the seals of...
Matches 1 - 50 out of 192 1 2 3 4 >