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| Number | Title | Issue Date |
| 7985373 | Alloy and tube for nuclear fuel assembly and method for making same The invention concerns an alloy containing equally 0.02 to 0.07% wt. % of the total iron, of chromium or vanadium, 0.8 to 1.3 wt. % of niobium, 100 ppm or less of tin, 1100 to 1700 ppm of oxygen, less than 100 ppm of carbon, 10 to 30 ppm of sulphur and less than 50 ... | 07/26/2011 |
| 7641799 | Method of separating isotopes A process in which isotopes of the same element belonging to the alkaline earth metals, transition elements and heavy metals having an atomic mass of less than 209, in particular lanthanide metals, are separated in an aqueous medium by treating an aqueous medium. | 01/05/2010 |
| 7627075 | Zirconium-based alloy and method for making a component for nuclear fuel assembly with same The invention proposes a zirconium-based alloy also containing, by weight, apart from unavoidable impurities, from 0.02 to 1% of iron, from 0.8% to 2.3% of niobium, less than 2000 ppm of tin, less than 2000 ppm of oxygen, less than 80 ppm of carbon, from 5 to 35 ppm... | 12/01/2009 |
| 7627073 | Method for designing a nuclear fuel assembly with damping guide tube A method to design a nuclear fuel assembly having the following steps including establishing the falling speed of the control rod upon entry into the lower damping portion when the control cluster falls in the event of a shutdown of the nuclear reactor, establishing... | 12/01/2009 |
| 7520043 | Method of securing a tube in a bore through a spherical wall, and a device for depositing welding material in a facing An annular facing is machined in an inside surface of the spherical wall around the periphery of a zone where the wall has a bore for securing the tube passing therethrough. A first welding material is deposited in the facing, and the bore is made by drilling throug... | 04/21/2009 |
| 7509242 | Method for designing the spider spring of a control cluster of a nuclear fuel assembly, corresponding system, computer program and product A method for designing a nuclear fuel assembly, including the steps of establishing a progression of a speed of the control cluster after the impact of the support against the upper end piece, establishing, based on the speed established in step a), a maximum longit... | 03/24/2009 |
| 7469030 | Spacer grid for a fuel unit in a nuclear reactor cooled by light water A spacer grid for a fuel assembly in a light-water-cooled nuclear reactor, for providing the transverse retention of a bundle of fuel rods in mutually parallel arrangements, having an array of cells juxtaposed and placed in a regular lattice, each bounded and separa... | 12/23/2008 |
| 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 |
| 7424085 | Cluster for adjusting a nuclear reactor core reactivity, absorber rod of the cluster and method for protecting the absorber rod against wear A control cluster for a pressurized water nuclear reactor comprising a bundle of neutron-absorbing rods each of which comprises a metal tube called cladding which is sealed off by a top end plug at its top end and by a bottom end plug at its bottom end and has a sup... | 09/09/2008 |
| 7386087 | Method and device for loading a fuel assembly into the core of a nuclear reactor The invention relates to a method and a device for loading a fuel assembly into the core of a nuclear reactor. The inventive method consists in: inserting a dummy assembly (4) into the loading location (3) of the fuel assembly (5), said dummy as... | 06/10/2008 |
| 7377288 | Passive device for balancing the pressure of first and second fluids and the use thereof The device comprises a first valve (35a) and a second valve (35b) each comprising a chamber (13a, 13b) communicating via an admission orifice (19a, 19b) with a circuit or a receptacl... | 05/27/2008 |
| 7344688 | Process for treating alkali metals charged with tritium or components contaminated with alkali metals charged with tritium The invention relates to a process for treating alkali metals such as sodium charged with tritium or components contaminated with alkali metals such as sodium charged with tritium, in which the alkali metal is reacted with liquid water or water vapor, so as to obtai... | 03/18/2008 |
| 7318899 | Method of separating isotopes A process in which isotopes of the same element belonging to the alkaline earth metals, transition elements and heavy metals having an atomic mass of less than 209, in particular lanthanide metals, are separated in an aqueous medium by treating an aqueous medium. | 01/15/2008 |
| 7314024 | Steam generator comprising an emergency feed water device The steam generator (1) comprises a first normal feed water device (8) and a second emergency feed water device (16) of the steam generator, comprising, respectively, a first toroidal header (10) and a second toroidal header (17) a... | 01/01/2008 |
| 7304267 | Method and a device for depositing a welding material in an annular facing machined in a spherical wall Welding material is deposited automatically in the annular facing. A welding torch is causes to rotate about an axis of rotation that extends in a direction that is radial relative to the spherical wall and that passes through a point of the concave inside surface o... | 12/04/2007 |
| 7290433 | Method and device for checking a sensor In an industrial installation equipped with a sensor, a method is provided for checking the sensor and providing a measurement sequence associated with the sensor. Monitoring occurs for a thermodynamic parameter of a monitored fluid circulating in the industrial ins... | 11/06/2007 |
| 7289590 | Method and apparatus for handling a tube guide of upper interval equipment of a nuclear reactor A device for handling a guide tube assembly. The assembly has an upper tube and a lower tube in each of which there are fixed horizontal guide plates arranged such that they are spaced apart in an axial direction. The handling device itself includes a gripper having... | 10/30/2007 |
| 7260512 | Method for determining threshold value of a nuclear reactor operating parameter, corresponding system, computer programme and support A method of determining a threshold value of a nuclear reactor operating parameter having the steps of simulating at least a transient operational occurrence of the nuclear reactor, calculating the value reached by a physical quantity during the transient operationa... | 08/21/2007 |
| 7192466 | Method for preparing nuclear metal or metal alloy particles Nuclear metal or alloy particle preparation method and device; said device comprising: means to prepare a fluid mass of the metal or alloy by melting; means to put the fluid mass of the metal or metal alloy in the ... | 03/20/2007 |
| 7178485 | Steam generator that includes a feedwater delivery device The steam generator includes a feedwater delivery device at an upper axial end of an annular space between an outer shell and a bundle wrapper of the steam generator. The feedwater, delivery device includes a header (11) having a shell of toroidal general sha... | 02/20/2007 |
| 7145976 | Procedure and means for replacing and procedure for repairing a section of a pipe in the primary circuit of a nuclear reactor In a nuclear reactor, cooled by pressurized water, an apparatus is employed for replacing a section of a primary circuit primary pipe that interconnects first and second components of a primary circuit. The apparatus cuts out and removes a section of the primary pip... | 12/05/2006 |
| 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 |
| 7040008 | Device for carrying out maintenance work in a region of a plant delimited by a wall having at least two facing surfaces The maintenance device comprises a robot (2) for carrying out maintenance work in a remote-controlled or programmed way in the maintenance region. The robot (2) comprises a supporting part (2a) connected to a clamping support (3) s... | 05/09/2006 |
| 7000571 | Heat exchanger, and in particular a steam generator having a convex bottom The steam generator (1) comprises an outer casing (2) with an axis (8) that is in a vertical disposition when the heat exchanger is in service, a bundle of tubes having straight portions that are parallel to one another and to the axis (8... | 02/21/2006 |
| 6980620 | Device for positioning and axially aligning a fuel assembly and process and apparatus for restoring a positioning element The apparatus for positioning a fuel assembly (10) comprises, on a respective side of the core support plate (19) and the upper core plate (9) directed towards an endpiece (15, 14) of the fuel assembly (10) at least two projecting ... | 12/27/2005 |
| 6915715 | Inspection probe for an internal wall of a duct The invention relates to an inspection probe for an internal wall of a duct, comprising at least one sensor mounted in a support adapted to be moved inside the duct while pressing said sensor flat against said internal wall. The support is formed by a shell which is... | 07/12/2005 |
| 6912263 | Method and device for feeding at least one steam generator of a pressurized-water nuclear reactor during periods of reactor shutdown At least one injector condenser (20) is used to supply secondary feedwater to the steam generator (1) during a phase in the course of which the temperature and the pressure of the coolant of the reactor coolant system (2) of the nuclear reactor ... | 06/28/2005 |
| 6888912 | Device for positioning and axially aligning a fuel assembly and process and apparatus for restoring a positioning element The apparatus for positioning a fuel assembly (10) comprises, on a respective side of the core support plate (19) and the upper core plate (9) directed towards an endpiece (15, 14) of the fuel assembly (10) at least two projecting ... | 05/03/2005 |
| 6876195 | Method and device for measuring the thickness of an oxide layer on the pencil cladding in a fuel assembly A process for measuring the thickness of a layer of oxide on a rod cladding in a fuel assembly comprising a bundle of rods parallel to each other and held in a framework comprising spacer grids for transversely holding rods distributed in an axial direction of the b... | 04/05/2005 |
| 6865242 | Method and device for restoring the fall-time of at least one control cluster for regulating reactivity in the core of a light-water-cooled nuclear reactor After a nuclear reactor has been stopped and allowed to cool down following a period of operation, action is taken in a pool of the nuclear reactor on at least one guide tube of the activated upper internal equipment of the nuclear reactor to enlarge (21b | 03/08/2005 |
| 6863745 | Zirconium based alloy and method for making a component for a nuclear fuel assembly with same The invention proposes a zirconium-based alloy also containing, by weight, apart from unavoidable impurities, from 0.02 to 1% of iron having from 0.8% to 2.3% of niobium, less than 2000 ppm of tin, less than 2000 ppm of oxygen, less than 100 ppm of carbon, from 5 to... | 03/08/2005 |
| 6606367 | Device for measuring the drop time of control rods into the core of a nuclear reactor The measurement device comprises a real-time measurement-signal acquisition module (25) and means (23, 24) for connecting the cables for picking up the voltage from electrical windings for measuring the movement of the control rods to the acquisition modu... | 08/12/2003 |
| 6544361 | Process for manufacturing thin components made of zirconium-based alloy and straps thus produced The present invention relates to a method for making flat, thin elements which consist of: producing a zirconium alloy blank also containing, besides the inevitable impurities, 0.8 to 1.3% of niobium, 1100 to 1800 ppm of oxygen, and 10 to 35 ppm of sulfur... | 04/08/2003 |
