Class 376/361 - Circulating fluid within reactor

Subclass of Class 376 - Induced nuclear reactions: processes, systems, and elements
Definition: Subject matter wherein one of the reactor components is
No. of patents: 31
Last issue date: 09/30/2008

Number	Title	Issue Date
7430266	Procedure and means for replacing and procedure for repairing a section of a pipe in the primary circuit of a nuclear reactor Marking of the cuts which have to be made, cutting of the section at two ends, removal of the section which has to be replaced, bevelling of the joint ends of the parts remaining after the section has been cut out from the pipe, adjustment of a new or replacement se...	09/30/2008
7333584	Nuclear power plant and operation method thereof A nuclear power plant and method of operation for augmenting a second reactor thermal power output in a second operation cycle to a level larger than a first reactor thermal power output in the previous operation cycle. The plant is equipped, for example, with a rea...	02/19/2008
7139356	Procedure and means for replacing and procedure for repairing a section of a pipe in the primary circuit of a nuclear reactor Marking of the cuts which have to be made, cutting of the section at two ends, removal of the section which has to be replaced, bevelling of the joint ends of the parts remaining after the section has been cut out from the pipe, adjustment of a new or replacement se...	11/21/2006
7139352	Reactivity control rod for core A reactivity control rod adapted to be used in a reactor core of a fast reactor and disposed at a substantially central portion of the reactor core for controlling a reactivity therein. The reactivity control rod includes a wrapper tube surrounded by a plurality of ...	11/21/2006
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 enters the or each coolant chamber at a high level and extends downwar...	11/14/2006
6980621	Main steam system around nuclear reactor A main steam system around a nuclear reactor which comprises two main steam nozzles in a reactor pressure vessel, each of the main nozzles being disposed at a symmetrical position with respect to a plane parallel to steam outlet faces of steam dryers provided inside...	12/27/2005
6888910	Methods and apparatuses for removing thermal energy from a nuclear reactor Method and apparatuses are provided for removing thermal energy from a nuclear reactor, which are fault tolerant. The apparatus includes at least one heat pipe configured to absorb thermal energy produced by the nuclear reactor. In addition, the apparatus includes a...	05/03/2005
6813328	Nuclear reactor submerged high temperature spool pump A fluid pump utilizing a canned rotor and canned stator is provided. The fluid pump has increased insulative properties over past “spool-type” pumps and has an increased ability to cool the stator, making it suitable for high temperature applications. A nuclear ...	11/02/2004
6781331	Method and apparatus for regulating motor generator output A method and system of regulating an output voltage of a boiling water reactor nuclear reactor plant recirculation system motor generator are provided. The method includes sensing an alternator output voltage and transmitting an alternator output voltage signal to a...	08/24/2004
6674830	Nuclear reactor plant The subject of the present invention is to provide a nuclear reactor plant of which is a direct cycle nuclear reactor using a carbon dioxide as a coolant such that a heat evacuation for liquefying coolant is reduced while a compressive work is reduced by ...	01/06/2004
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 improvement of safety. A partition member (5) is arranged above a co...	07/15/2003
6445758	Internal structure of nuclear reactor with coolant flow stabilizing facility Within an upper plenum of a nuclear reactor, a portion of a heated coolant flows radially outward from a central portion of a core barrel (30) towards outlet nozzles (12) in a region of an upper core plate (21) extending outside of an outer periphery of t...	09/03/2002
6375230	Apparatus and methods for precluding separation of a thermal sleeve and elbow joint in the recirculation system of a nuclear reactor A clamp assembly prevents separation of a thermal sleeve penetrating a nuclear reactor pressure vessel wall and a jet pump riser elbow welded one to the other and lying within an annular space between the pressure vessel wall and core shroud. The clamp as...	04/23/2002
6236700	Downcommer coupling apparatus and methods Downcommer coupling apparatus and methods for replacing a core spray line downcommer pipe coupled to a shroud T-box are described. In one embodiment, the coupling apparatus includes a wedge flange, a wedge, a wedge housing, a pipe seal, a cylindrical pipe...	05/22/2001
5778035	Control of coolant flow in a nuclear reactor A nuclear fuel core in a pressurized-water reactor including fuel assemblies, each of which comprise a top tie plate; a bottom tie plate, the top tie plate and the bottom tie plate having through-openings for passing coolant flowing from beneath upwards t...	07/07/1998
5528641	Fuel assembly A fuel assembly is provided with a coolant ascending path for making coolant rise and a water rod having a coolant descending path for conducting the coolant. A ratio of a flow area in a coolant inlet port of the smallest in coolant ascending path 13 on t...	06/18/1996
5440600	Laminated electromagnetic pump stator core A stator core for an electromagnetic pump includes a plurality of circumferentially abutting tapered laminations extending radially outwardly from a centerline axis to collectively define a radially inner bore and a radially outer circumference. Each of t...	08/08/1995
5426675	Self-aligning seal system for maintenance service in nuclear reactor pressure vessels A self-aligning seal system for use in carrying out maintenance services in a nuclear fission reactor plant is disclosed. The self-aligning seal system enables an operator to block off openings in the lower portion of a water filled reactor pressure vesse...	06/20/1995
5265136	Sodium cooled fast reactor A sodium cooled fast ractor comprises a reactor vessel in which a liquid metal coolant is accommodated, a core disposed substantially a lower central portion of the reactor vessel in an installed state, a core support structure secured to the reactor vess...	11/23/1993
5263070	Nuclear reactor with multiple internal heat exchangers A tank type nuclear reactor comprises an outer shielding wall structure, a reactor vessel installed in the shielding wall structure and provided with an inner sealed space in which a primary liquid coolant circulates, a reactor core disposed in the reacto...	11/16/1993
5263068	Method for arranging the power terminals of coils in annular flow electromagnetic pumps for nuclear fission reactors Stator coils for linear flow electromagnetic induction pumps for pumping liquid metal circulating through a hydraulic system are provided with advantageous deployments of coil power terminals and leads....	11/16/1993
5154880	Nuclear fuel bundle with coolant bypass channel A fuel bundle for a natural-circulation boiling-water reactor includes at least one coolant bypass tube which is at least partially open at both its top and bottom and extends about 2/3 of the bundle height. Water within the bypass tube remains liquid. As...	10/13/1992
5084236	Converging spout outlet nozzle on an offset pump casing A nuclear reactor coolant pump for pumping reactor coolant fluid in a reactor coolant system includes a casing, a rotor and an impeller. The casing defines an inlet nozzle for receiving the fluid, a peripheral outlet nozzle for discharging the fluid, and ...	01/28/1992
5053190	Water cooled nuclear reactor and pressurizer assembly A water cooled nuclear reactor comprises a reactor core, a primary water coolant circuit and a pressurizer arranged as an integral unit in a pressure vessel. The pressure vessel is divided into an upper chamber and a lower chamber by a casing, the reactor...	10/01/1991
5023047	Nuclear reactor having an ascending cooling path much greater than the descending cooling path A fuel assembly has a water rod which consists of a coolant ascending path and a coolant descending path, the coolant ascending path opening below a fuel support of a lower tie plate, the coolant descending path opening above the fuel support and adapted ...	06/11/1991
4908180	Pressurized water nuclear reactor with a fuel rod containing a nuclear fuel column enriched to a variable extent over the length of the rod A pressurized water nuclear reactor includes a reactor core, a nuclear reactor fuel assembly disposed in the reactor core, a fuel rod disposed in the fuel assembly, and a nuclear fuel column disposed in the fuel rod being enriched to a variable extent wit...	03/13/1990
4780272	Device for suspending a structure A device for suspending a core cover from a sealing slab of a fast neutron nuclear reactor of the type comprising a vertically axed vessel structure filled with liquid metal, closed by the slab and containing the reactor core. The device comprises an uppe...	10/25/1988
4362694	Liquid metal-cooled nuclear reactor Integrated nuclear reactor cooled by a liquid metal and incorporating a main vessel sealed in its upper part by a slab, an inner vessel containing the core, the latter resting on a system for the positioning and supply of the core with liquid metal and wh...	12/07/1982
4339410	Control for liquid plant A temperature control system for liquid plant is comprised of liquid metal, plant members, heaters for heating these liquid metal and the plant members at respective control points, a temperature control unit and a control unit. The plant members include ...	07/13/1982
4056437	Fast reactor core In the core of a fast breeder reactor, an inner zone having a heterogeneous structure and a given enrichment is surrounded by a zone of fertile material constituting an outer blanket. The inner zone is made up of coaxial cylindrical layers arranged altern...	11/01/1977
4019954	Safety device for a nuclear reactor and especially a fast reactor The safety device comprises an absorber element connected by a separable coupling to the lower end of a vertical operating stem. When released, the absorber element drops under gravity from a top position to a bottom position within an open-topped casing ...	04/26/1977

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Class 376/361 - Circulating fluid within reactor