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| Number | Title | Issue Date |
| 7639771 | Memory device with external magnetic field generator and method of operating and manufacturing the same A memory device with a magnetic field generator and method of operating and manufacturing the same. In the device and method, a magnetic memory may includes a magnetic tunneling junction (MTJ) cell, a transistor, and a bit line, and a magnetic field generator extern... | 12/29/2009 |
| 7349518 | Boiling water reactor core and fuel assemblies therefor A ratio of the number of fuel assemblies loaded on a core to the number of control rod drive mechanisms is 3 or more. The fuel assembly itself contains mixed oxides of a low enrichment concentration uranium oxide containing 3 to 8 wt % in the average enrichment conc... | 03/25/2008 |
| 7257185 | Fuel assembly and thimble screw of the same A fuel assembly includes a bottom nozzle set on a lower core plate of a nuclear reactor, a top nozzle with a hold down spring to urge the bottom nozzle against the lower core plate, guide thimbles which guide control rods, having passed through the top nozzle, towar... | 08/14/2007 |
| 7215729 | Fuel assembly and nuclear reactor A resistance member (e.g., fuel holding portion of the lower tie plate) is provided at the lower end of the fuel assembly. Provision is made of a coolant ascending path in which said water rods have coolant inlet ports that are open in a region lower than the resist... | 05/08/2007 |
| 6925138 | Reactor core and method for operating nuclear reactor The present invention is to provide a reactor core that allows a nuclear plant to continuously operate for a long term period, for example 15 years or longer, without requiring any fuel exchange, reduces the duration and number of maintenance steps involved in regul... | 08/02/2005 |
| 6678344 | Method and apparatus for producing radioisotopes A method and apparatus for optimizing the production of Pu-238 in a nuclear reactor during normal reactor operation is disclosed wherein the production of Pu-238 is confined to one or more selectively replaced fuel cells with target cells located in the i... | 01/13/2004 |
| 6512805 | Light water reactor core and fuel assembly There are provided a light water reactor core which has the same levels in cost efficiency and degree of safety as those of an existing BWR under operation now, that is, which is oriented to plutonium multi-recycle having a breeding ratio near 1.0 or slig... | 01/28/2003 |
| 6233298 | Apparatus for transmutation of nuclear reactor waste A subcritical reactor-like apparatus for treating nuclear wastes, the apparatus comprising a vessel having a shell and an internal volume, the internal volume housing graphite. The apparatus having means for introducing a fluid medium comprising molten sa... | 05/15/2001 |
| 6026136 | Seed-blanket reactors Seed-blanket type nuclear reactor cores are employed to burn thorium fuel with conventional reactor fuels, including nonproliferative enriched uranium, and weapons or reactor grade plutonium. In a first embodiment, the core is completely nonproliferative ... | 02/15/2000 |
| 5966418 | Method for the destruction of plutonium by irradiation in a light water reactor This invention relates to a method for the destruction of plutonium (Pu) by irradiation in a light water reactor (LWR). According to the invention Pu is mixed with highly enriched uranium (U) in roughly equal weight proportion rates. This mixture is embed... | 10/12/1999 |
| 5940461 | Reactor core for a light water cooled reactor, fuel assembly and control rod To provide a reactor core for light water cooled reactor, a fuel assembly and a control rod intended for Pu multi-recycling at a breeding ratio of about 1.0, or 1.0 or more while keeping the economical or safety performance to the same level as in BWR now... | 08/17/1999 |
| 5812621 | Reactor core for a light water cooled reactor, fuel assembly and control rod A reactor core for a boiling water reactor, a fuel assembly and a control rod intended for Pu multi-recycling at a breeding ratio of about 1.0, or 1.0 or more while keeping the economical or safety performance to the same level as in a boiling water react... | 09/22/1998 |
| 5774514 | Energy amplifier for nuclear energy production driven by a particle beam accelerator A method for producing energy from a nuclear fuel material contained in an enclosure, through a process of breeding of a fissile element from a fertile element of the fuel material via a ଲ-precursor of the fissile element and fission of the fissile ... | 06/30/1998 |
| 5499276 | Method for minor actinide nuclides incineration Neptunium of minor actinide nuclides separated from spent fuel is added to fuel of reactor cores (inner reactor cores and/or outer reactor cores) of a fast reactor and americium of the separated minor actinide nuclides and rare earth elements are added to... | 03/12/1996 |
| 5386439 | Spectral shift nuclear reactor with improved efficiency During operation of a light water moderated and cooled nuclear reactor, rods varying the neutron energy spectrum are introduced into the core of the reactor in the course of a first phase of the cycle in order to reduce the ratio of the volume of moderato... | 01/31/1995 |
| 5100608 | In-core nuclear instrumentation for fast breeder reactors In-core nuclear instrumentation for a fast breeder reactor includes a neutron flux measuring unit disposed in a control rod assembly, whereby it is possible to measure a change in in-core neutron flux reliably and highly accurately without requiring a maj... | 03/31/1992 |
| 5037607 | Reactor The present invention provides a structural component for constituting a reactor core comprising one and the other metallic members arranged adjacent to each other in a reactor, and reduction means for reducing a difference in the swelling between the met... | 08/06/1991 |
| 4681726 | Fast breeder reactor A fast breeder reactor has a nuclear reactor container filled with a liquid metal, a reactor core disposed within the nuclear reactor container, and a first supporting structural member which is mounted to the nuclear reactor container such as to support ... | 07/21/1987 |
| 4562034 | Fast breeder A fast breeder has a driver core region enriched with a fissile material and a blanket core region containing mainly a fertile material. The driver core region includes an inner core region and an outer core region surrounding the inner core region. The v... | 12/31/1985 |
| 4508677 | Modular nuclear reactor for a land-based power plant and method for the fabrication, installation and operation thereof A self-contained modular nuclear reactor which can be prefabricated at a factory location, nuclear-certified at the factory, transported to a field location for final assembly and connection to a large-scale electric-power generating facility. The modular... | 04/02/1985 |
| 4495137 | Nuclear reactor A nuclear reactor in which the space between a reactor vessel and a guard vessel disposed outside the reactor vessel is kept in a pressurized, sealed state. The sealed space and the space outside the guard vessel are communicate only through a liquid mano... | 01/22/1985 |
| 4493809 | Uranium thorium hydride nuclear fuel A nuclear fuel includes uranium dispersed within a thorium hydride matrix. The uranium may be in the form of particles including fissile and non-fissile isotopes. Various hydrogen to thorium ratios may be included in the matrix. The matrix with the fissil... | 01/15/1985 |
| 4294658 | Nuclear reactors A liquid metal cooled fast breeder nuclear reactor of the pool kind has an intermediate heat exchange module comprising a tube-in-shell heat exchanger and an electromagnetic flow coupler in the base region of the module. Primary coolant is flowed through ... | 10/13/1981 |
| 4236965 | Target assembly A target for a proton beam which is capable of generating neutrons for absorption in a breeding blanket includes a plurality of solid pins formed of a neutron emissive target material disposed parallel to the path of the beam and which are arranged axiall... | 12/02/1980 |
| 4152204 | Device for controlling the power output of a core reactor and for turning off the same A device for controlling the power output of a core reactor and for turning ff the same, in which that portion of the device which contains absorber material comprises a first component in the form of absorber rods for turning off the core reactor which ab... | 05/01/1979 |
| 4121969 | Contained fissionly vaporized imploded fission explosive breeder reactor A nuclear reactor system which produces useful thermal power and breeds fissile isotopes wherein large spherical complex slugs containing fissile and fertile isotopes as well as vaporizing and tamping materials are exploded seriatim in a large containing ... | 10/24/1978 |
| 4111747 | Packed rod neutron shield for fast nuclear reactors A fast neutron nuclear reactor including a core and a plurality of vertically oriented neutron shield assemblies surrounding the core. Each assembly includes closely packed cylindrical rods within a polygonal metallic duct. The shield assemblies are less ... | 09/05/1978 |
| 4093514 | Method of bringing nuclear power plant to fractional electrical load conditions A method of bringing a nuclear power plant to fractional electric load conditions, which power plant comprises at least two nuclear reactors, at least one nuclear reactor being a breeder and both reactors transferring heat to the turbine working substance... | 06/06/1978 |
| 4078968 | Sealed head access area enclosure A liquid-metal-cooled fast breeder power reactor is provided with a sealed head access area enclosure disposed above the reactor vessel head consisting of a plurality of prefabricated structural panels including a center panel removably sealed into positi... | 03/14/1978 |
| 4024018 | Liquid metal cooled fast breeder nuclear reactors In a liquid metal cooled fast breeder nuclear reactor of the pool kind a fuel transfer rotor submerged in the pool of coolant carries an annular series of thimble shaped containers for receiving fuel assemblies. The containers are elastically supported in... | 05/17/1977 |
| 3993539 | Method and device for measuring fluid flow This invention is a fluid flow measuring device for determining the coolant flow at the entrance to a specific nuclear reactor fuel region. The device comprises a plurality of venturis having the upstream inlet and throat pressure of each respectively man... | 11/23/1976 |
| 3974028 | Reactor and method of operation A nuclear reactor having a flattened reactor activity curve across the reactor includes fuel extending over a lesser portion of the fuel channels in the central portion of the reactor than in the remainder of the reactor.... | 08/10/1976 |
