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Areva patents


Recent patent applications related to Areva. Areva is listed as an Agent/Assignee. Note: Areva may have other listings under different names/spellings. We're not affiliated with Areva, we're just tracking patents.

ARCHIVE: New 2018 2017 2016 2015 2014 2013 2012 2011 2010 2009 | Company Directory "A" | Areva-related inventors


Method for the treatment of an aqueous nitric solution resulting from dissolving spent nuclear fuel, said method being performed in a single cycle and without requiring any operation involving reductive stripping of plutonium

. . . . A method for the treatment of an aqueous solution resulting from the dissolution of a spent nuclear fuel in nitric acid, allowing the uranium and plutonium contained in the solution to be extracted, separated and decontaminated in a single cycle, without requiring any operation involving a reductive stripping of plutonium. Applications for the method include the processing of uranium-based and/or plutonium-based spent nuclear fuels.. ... Areva

Field programmable gate array comprising plurality of functional blocks, and control device for a power plant

A field programmable gate array comprising: plurality of functional blocks at least one of the functional blocks comprising at least one function, at least one of the functions using a parameter, wherein the functional blocks are adapted to perform the at least one function in a calculation phase; a data conveyor comprising a plurality of data slots, wherein each functional block is, in a data transfer phase, adapted to receive input data from one or more predefined first slots and/or to provide output data into one or more predefined second slots; and a configuration circuit adapted to configure the parameter for the at least function using the parameter and to define the one or more first slots and/or the one or more second slots for at least one functional block, wherein the field programmable gate array is adapted to cyclically repeat the data transfer phase and calculation phase.. . ... Areva

Method for separating iron from an organic phase containing uranium and method for extracting uranium from an aqueous solution of mineral acid containing uranium and iron

The application relates to a method for separating iron from an initial liquid organic phase containing uranium and iron, wherein the initial liquid organic phase is contacted with an aqueous solution referred to as aqueous de-ironing solution, whereby the iron passes into the aqueous solution to form a final liquid aqueous phase, and uranium remains in the initial liquid organic phase to form a final liquid organic phase referred to as de-ironed organic phase. The method is characterised in that the aqueous de-ironing solution contains an inorganic acid and uranium, and does not contain iron. ... Areva

Apparatus and process for thermal denitration, use of such an apparatus and product obtained by means of such a process

An apparatus (1) for thermal denitration of a uranyl nitrate hydrate to uranium trioxide uo3. The apparatus (1) comprises a burner (114) and a reaction chamber (110) configured to carry out thermal denitration of uranyl nitrate hydrate and to form uranium trioxide uo3 in the form of particles. ... Areva

Assembly for inserting a thermocouple into a tubular pipe and corresponding method

An insertion assembly (1) includes a frame (11), having a longitudinal passage (13) for the thermocouple (3); a device (15) for blocking the pipe (5) in position relative to the frame (11); a device (17) for guiding the thermocouple along the passage (13); and a device (19) for driving the thermocouple (3). The driving device (19) includes at least a first drive belt (21) having a first longitudinal segment (25) pressed against the thermocouple (3), and a motor member driving said first segment (25) of the first belt (21) longitudinally relative to the frame (11).. ... Areva

Mosaic module for a control panel of a power plant, control panel, and system comprising a control panel and a power generating unit

The present invention concerns a mosaic module for a control panel of a power plant, the control panel comprising a plurality of mosaic modules being arranged adjacent to each other, each mosaic module being adapted to be fixed to a mechanical support structure, the mosaic module comprising: at least one display device for displaying a function of the power plant and/or an input device, at least one optical power supply input for receiving a power supply for the mosaic module via one or more first optical links, and at least one optical data input for receiving data to be displayed on the display device and/or at least one optical data output to transmit an input command received from the input device.. . ... Areva

Radionuclide generation system and method of producing radionuclides

A method of producing radionuclides from irradiation targets in a nuclear reactor uses at least one instrumentation tube system of a commercial nuclear reactor. Irradiation targets and dummy targets are inserted into an instrumentation finger and the irradiation targets are activated by exposing them to neutron flux in the nuclear reactor core to form a radionuclide. ... Areva

Method for checking equivalence of code, non-transitory computer-readable storage medium, computer program product and computer for implementing the method

A method checks the functional equivalence of two pieces of software for control systems, engineered from function block diagram with a plurality of interconnected function blocks. The method includes a) generating a first instance of compilable source code; b) parsing the first instance of source code; c) using the information from step b) to reconstruct a first data flow graph of the first instance of source code; d) generating a second instance of compilable source code from a second plurality of function block diagrams; e) parsing the second instance of source code; f) using the information from step e) to reconstruct a second data flow graph of the second instance of source code; g) comparing the first identified data flow graph and the second identified data flow graph, and checking if the transitive closure of input up to that node in the second instance of source code is the same.. ... Areva

Method of decontaminating metal surfaces in a cooling system of a nuclear reactor

A method of decontaminating metal surfaces in a cooling system of a nuclear reactor comprises conducting a plurality of treatment cycles, with each of the treatment cycles comprising: an oxidation step wherein metal oxides including radioisotopes on the metal surfaces are contacted with an aqueous solution of a permanganate oxidant; a decontamination step after the oxidation step wherein the metal oxides are contacted with an aqueous solution of an organic acid selected from the group consisting of oxalic acid, formic acid, citric acid, tartaric acid, picolinic acid, gluconic acid, glyoxylic acid and mixtures thereof so as to dissolve at least part of the metal oxides and the radioisotopes; and a cleaning step wherein at least the radioisotopes are immobilized on an ion exchange resin; wherein the oxidation step comprises at least one acidic oxidation step and at least one alkaline oxidation step carried out one after another in either the same or different treatment cycles; and wherein the plurality of treatment cycles comprises at least one treatment cycle including a high temperature oxidation step, wherein the permanganate oxidant solution is kept at a temperature of at least 100° c. And, wherein the at least one reactor coolant pump is used to circulate and heat the oxidation solution inside the primary loop, and the residual heat removal system is used to control the temperature of the oxidant solution during the high temperature oxidation step.. ... Areva

Device and method for checking a fuel rod of a fuel element

The disclosure relates to a device for checking a fuel rod comprising a testing container having first and second chambers, a first checking device arranged in the testing container, wherein the testing container has at least one inlet opening, at least one outlet opening, and an insertion opening for inserting the fuel rod into the second chamber, and wherein a valve is arranged in a connecting channel connecting the first and the second chamber. A method is disclosed for checking a fuel rod in a water-filled basin of a submerged nuclear plant having such a device, wherein the fuel rod is inserted into the second chamber of the testing container through the insertion opening while the valve is closed, wherein a fluid is fed in via the at least one inlet opening, and wherein the valve is opened in order to check the fuel rod with the first checking device.. ... Areva

Irradiation target processing system

An irradiation target processing system for insertion and retrieving irradiation targets into and from an instrumentation tube in a nuclear reactor core comprises, a target retrieving system, target insertion system and transport gas supply system, mounted on a movable support, wherein: the target retrieving system comprises a target exit port coupled to a target storage container and exhaust system; the target insertion system comprises a target filling device, target retention tubing with target supply junction connectable to the instrumentation tube, and a target diverter coupled to the target filling device, target retention tubing and target retrieving system; and the transport gas supply system comprises a first gas supply tubing coupled to the exit port of the target retrieving system, a second gas supply tubing coupled to a junction for supplying gas to the instrumentation tube, and a transport gas supply junction coupled to the first and second gas supply tubing.. . ... Areva

Radionuclide generation system

A radionuclide generation system comprises a tube system configured to permit insertion and removal of irradiation targets into an instrumentation finger of a nuclear reactor, and an irradiation target drive system configured to insert the irradiation targets into the instrumentation finger and to remove the irradiation targets from the instrumentation finger. The radionuclide generation system further comprises an instrumentation and control unit which is linked to an online core monitoring system and being configured to calculate an optimum irradiation time for the irradiation targets based on the actual state of the reactor as provided by the online core monitoring system.. ... Areva

Method of preparing of irradiation targets for radioisotope production and irradiation target

The invention provides a method of preparing irradiation targets for radioisotope production in instrumentation tubes of a nuclear power reactor, the method comprising the steps of: providing a powder of an oxide of a rare earth metal having a purity of greater than 99%; consolidating the powder in a mold to form a round green body having a green density of at least 50 percent of the theoretical density; and sintering the spherical green body in solid phase at a temperature of at least 70 percent of a solidus temperature of the rare earth metal oxide powder and for a time sufficient to form a round sintered rare earth metal oxide target having a sintered density of at least 80 percent of the theoretical density.. . ... Areva

Method of preparing of irradiation targets for radioisotope production and irradiation target

The invention provides a method of preparing irradiation targets for radioisotope production in instrumentation tubes of a nuclear power reactor, the method comprising the steps of: providing a powder consisting of an oxide of a rare earth metal having a purity of greater than 99% and, optionally, an organic binder; pelletizing the powder and optionally the organic binder to form a substantially spherical green body having a diameter of from between 1 to 10 mm; and sintering the spherical green body in solid phase at a temperature of at least 70 percent of a solidus temperature of the rare earth metal oxide powder and for a time sufficient to form a round sintered rare earth metal oxide target having a sintered density of at least 80 percent of the theoretical density.. . ... Areva

01/18/18 / #20180017530

Device for ultrasonic testing of fasteners and associated method

The device for the ultrasonic inspection of fasteners, such as screws, bolts or studs, the fastener comprising a head, the device comprising a probe, the probe comprising at least one piezoelectric multi-element matrix sensor, is characterized in that the piezoelectric multi-element matrix sensor has an active part having a surface area substantially equal to that of the head of the fastener and divided into one or more zones arranged in the form of a matrix, each zone comprising one or more elements, the device comprising a controller programmed to implement one or more successive control configurations, in the course of each configuration the controller activating one or more areas as transmitters and activating one or more areas as receivers.. . ... Areva

01/11/18 / #20180013952

Scene reconstruction by assembling images

A method for inspecting a surface (12) of a piece of nuclear power plant equipment includes scanning the surface (12) with an acquisition field (20) of a matrix array camera (14). The acquisition field (20) moves relative to the surface (12) at a movement speed. ... Areva

01/11/18 / #20180010979

Device and method for performing a leak test on fuel rod capsules

The invention relates to a device for performing a leak test on a fuel rod capsule, which contains at least one fuel rod and test gas, which device comprises a test container, which is designed to accommodate at least one fuel rod capsule and can be lowered into a pool of a nuclear plant flooded with water. According to the invention, a mass spectrometer is fluidically connected to the interior of the test container in such a way that a gas flow can be fed to the mass spectrometer in order to sense the concentration of the test gas that has diffused into the test container from the fuel rod capsule.. ... Areva

01/04/18 / #20180003566

Temperature-measuring stick with an easily replaceable thermocouple

The invention relates to a thermocouple (17) suspended from a part (26, 27) that can be locked onto a connecting section of the measuring stick, which comprises an opening in the form of a guiding cone (30) for inserting the thermocouple. The thermocouple is contained in a flexible cable (24) that can slide in a sheath (35) of the central compartment (16) which houses the thermocouple (17). ... Areva

12/28/17 / #20170372807

Packaging for decommissioned and dismantled nuclear reactors and reactor components

A method of decommissioning a nuclear reactor including a vessel defining an inner chamber and reactor internal components positioned within the inner chamber includes removing at least some of the internal components and repackaging at least some of the removed internal components in at least one of the first and second predefined sections of the vessel defining a cutting zone between the at least first and second predefined sections. The method further includes disposing the vessel in a container, and encapsulating the internal components in the vessel and encapsulating the vessel in the container to generate a package. ... Areva

12/21/17 / #20170365370

Irradiation target for radioisotope production, method for preparing and use of the irradiation target

The invention provides a sintered rare earth metal oxide target for producing a radioisotope in an instrumentation tube of a nuclear power reactor, wherein the sintered target has a density of at least 90 percent of the theoretical density, and wherein the sintered target contains chromium in an amount of from 500 to 2000 μg/g, and mg and/or ca in an amount of from 1000 to 6000 μg/g. The sintered target is prepared by providing a rare earth metal oxide powder, blending the rare earth metal oxide powder with chromium oxide, dry granulating and consolidating the powder in a mold to form a spheroidal green body, and sintering the green body in solid phase to form a spheroidal ytterbia target.. ... Areva

12/07/17 / #20170352898

Electrical system comprising a stack of electrochemical cells and method for controlling said system

An electrical system includes a stack (3) of electrochemical cells (5), a power converter (9) electrically connected to the stack (3), a voltage comparator (7) for comparing the voltage at the terminals of at least one group of at least one electrochemical cell (5) of the stack (3) to a threshold voltage, and a control module (11) for controlling the converter (9). The control module (11) includes a generator (74) for generating a control instruction for controlling the converter (9) and a transmission member (76) for transmitting the control instruction to the converter (9). ... Areva

12/07/17 / #20170352439

Method and device for replacing control rod drives

A control rod drive replacement device is provided. The control rod drive replacement device includes a first channel for mounting on a support under a nuclear reactor pressure vessel; a first control rod drive extractor removably received in the first channel, the first control rod drive extractor including a first housing configured for receiving a first control rod drive, the first housing being movable between a horizontal orientation in which the first housing is aligned within the first channel and a vertical orientation in which the first housing is aligned for receiving the first control rod drive from the nuclear reactor pressure vessel; a second channel connected on top of the first channel under the nuclear reactor pressure vessel; and a second control rod drive extractor removably received in the second channel, the second control rod drive extractor including a second housing configured for receiving a second control rod drive, the second housing being movable between a horizontal orientation in which the second housing is aligned within the second channel and a vertical orientation in which the second housing is aligned for receiving the second control rod drive from the nuclear reactor pressure vessel.. ... Areva

11/23/17 / #20170339803

Ventilator arrangement, fan flap configuration and related control cabinet

. . A fan arrangement has a plurality of fans arranged in parallel to each other and configured to generate airflow along a common main flow direction. A flow channel is assigned to each fan, and a respective flow channel has a flap that can be swiveled between an open position and a closed position. ... Areva

11/23/17 / #20170338503

Method for controlling a fuel cell and associated fuel cell system

A method for controlling a fuel cell (12) includes the following steps: measuring the fluid pressure in a first compartment from the anode and cathode compartments of the fuel cell (12); calculating a first target pressure for the fluid pressure in the second compartment of the fuel cell (12), the first target pressure depending on the fluid pressure measured in the first compartment; stabilizing the fluid pressure in the second compartment to the first target pressure; measuring the fluid pressure in the second compartment; calculating a second target pressure for the fluid pressure in the first compartment, the second target pressure depending on the fluid pressure measured in the second compartment; and stabilizing the fluid pressure in the first compartment at the second target pressure.. . ... Areva

11/23/17 / #20170337298

Probabilistic evaluation of fastener degradation in nuclear power plants

A probabilistic method for determining an operability interval for fasteners in a nuclear power plant assembly is provided. The probabilistic method includes determining or assuming a geometric distribution of a given initial condition of fasteners in the nuclear power plant assembly at an initial time t0; determining a future fastener failure probability model of the geometric distribution over time; generating a plurality of random future fastener failure patterns by applying the fastener failure model to the geometric distribution at a given time t1>t0; postulating fastener spacing rules designed to evaluate the acceptability of fastener failure patterns for the fasteners in the nuclear power plant assembly; applying the fastener spacing rules to a plurality of randomly generated fastener failure patterns for the given time t1 to determine the probability of the randomly generated fastener failure patterns passing the fastener spacing rules at the given time t1; iterating, by a processor of a computer, the applying step for a given range of time values t2, t3, . ... Areva

11/09/17 / #20170324312

Stator for a generator and a flux switching machine for a wind turbine

A stator for a generator of a wind turbine is provided. The stator comprises a magnetic frame, magnets, and magnetic sections spaced from each other. ... Areva

11/09/17 / #20170323626

Ultrasound transducer

An ultrasound transducer is provided. The ultrasound transducer include at least one emitter made from a piezoelectric material, having first and second emitting surfaces opposite one another provided to emit first and second ultrasound beams. ... Areva

09/28/17 / #20170278587

Assembly for acting on the outer surface of a tube, and corresponding method

An assembly for acting on the outer surface of a tube, and corresponding method are provided. The assembly includes a carrier; at least one inspection or maintenance tool; the carrier includes at least one rolling body; an actuator. ... Areva

07/27/17 / #20170212249

Gel formulations for detecting and locating radioactive surface contamination of solid substrates, and detection and location method using said gels

. . The invention relates to gels for detecting and locating radioactive surface contamination of a solid material substrate, particularly via change in the colour of the gels within the visible range or via attenuation, fading, of the colour of the gels, i.e. Decoloration of the gels. ... Areva

07/20/17 / #20170206986

Convective dry filtered containment venting system

A dry fcvs for a nuclear reactor containment is provided. The dry fcvs includes a housing and a round and/or elongated aerosol filter inside the housing for removing contaminant aerosols from gas passing through the housing during venting of the containment. ... Areva

06/01/17 / #20170154696

Canister movement assembly for transfer, rotation, and/or inspection

A movement system for moving a dry shielded canister includes a stabilization portion, and a canister support portion engaged with the stabilization portion, the canister support portion including a roller interface for supporting and moving a canister. A method of moving a dry shielded canister includes moving a roller interface from a retracted position to an extended position to engage with the canister; and moving the canister.. ... Areva

06/01/17 / #20170154693

Inner cask roller assembly

An inner cask roller assembly for lining the inner surface of a cask configured for receiving a canister includes: a first section of first rollers protruding inwardly from the inner surface at a first distance measured radially from the inner surface of the cask; a second section of second rollers adjacent the first section and protruding inwardly from the inner surface at a second distance measured radially from the inner surface of the cask, wherein the second distance is greater than the first distance; and a third section of second rollers adjacent the first section and protruding inwardly from the inner surface from the assembly at the first distance measured from the inner surface of the cask. A cask assembly includes the inner cask roller assembly. ... Areva

06/01/17 / #20170154690

Method and device for storing containers having an encapsulated fuel rod or a fuel rod section

A method for encapsulating a fuel rod or a fuel rod section in a container includes inserting the fuel rod or fuel rod section into the container. One of the ends of the container is connected to a purging-gas line. ... Areva

06/01/17 / #20170152105

Horizontal storage module, carriage assembly, and canister transfer assemblies

A horizontal storage module (hsm) includes a body defining a plurality of compartments configured for receiving canisters, wherein the compartments are arranged in a first row at a first elevation and a second row at a second elevation higher than the first elevation, and wherein at least a portion of one compartment in the first row is in the same horizontal axis location as at least a portion of one compartment in the second row. A method of manufacturing the hsm includes positioning adjacent segments. ... Areva

05/04/17 / #20170122837

Test unit for quantitative analysis of a contact pattern on a tooth surface of a gear, method for quantitative analysis and use of the test unit

A test unit for quantitative analysis of a contact pattern and a method for quantitative analysis are provided. The test unit comprises an optoelectronic sensor that captures images of a contact pattern paint on a tooth surface of a gear. ... Areva

04/20/17 / #20170108013

Sealing device for jet pump slip joints

A sealing device for a jet pump of a boiling water reactor is provided. The jet pump includes an inlet mixer and a diffuser receiving the inlet mixer at a slip joint such that an outer circumferential surface of the inlet mixer is received in an inner circumferential surface of the diffuser at the slip joint. ... Areva

04/20/17 / #20170107085

Tool for handling a long and heavy object

A tool for handling a long and heavy object, in particular a wind turbine rotor blade, includes a clamping unit which can be fixed to the rotor blade. The clamping unit has a first clamp and a second clamp spaced from the first clamp with respect to a longitudinal direction of the object. ... Areva

04/06/17 / #20170098484

Packaging for decommissioned and dismantled nuclear reactors and reactor components

A method of decommissioning a nuclear reactor including a vessel defining an inner chamber and reactor internal components positioned within the inner chamber includes removing at least some of the internal components and repackaging at least some of the removed internal components in at least one of the first and second predefined sections of the vessel defining a cutting zone between the at least first and second predefined sections. The method further includes disposing the vessel in a container, and encapsulating the internal components in the vessel and encapsulating the vessel in the container to generate a package. ... Areva

03/23/17 / #20170082141

Hybrid shaft bearing, wind generator comprising a hybrid shaft bearing, use of the hybrid shaft ...

A hybrid shaft bearing, a wind generator comprising the hybrid shaft bearing, a use of the hybrid shaft bearing and a method of operating the hybrid shaft bearing is provided. The hybrid shaft bearing comprises a hydrodynamic friction bearing and a rolling bearing. ... Areva

03/16/17 / #20170076458

Device and method for three-dimensional reconstruction of a scene by image analysis

A device and method for three-dimensional reconstruction of a scene by image analysis is provided. This device comprises an image acquisition device to capture images of the scene, an analysis device to calculate a three-dimensional reconstruction of the scene from at least one image of the scene taken by the image acquisition device, and a projection device to project a first light pattern and a second light pattern, which are complementary, on the examined scene, the first light pattern and the second light pattern being projected along separate projection axes forming a non-zero angle between them, so as to be superimposed while forming a uniform image with homogenous intensity in a projection plane.. ... Areva

03/09/17 / #20170067855

Method for testing a workpiece using ultrasound

The application relates to a method for testing a workpiece using ultrasound in a curved region of the surface of said workpiece, having the following steps: a plurality of ultrasonic signals are emitted from a plurality of transmitting positions into the workpiece a corresponding ultrasonic echo signal is received for each ultrasonic signal the ultrasonic echoes having amplitudes representing local maxima are determined for each transmitting position if an individual ultrasonic echo having an amplitude representing a local maximum was determined for a transmitting position in the associated ultrasonic echo signal of said echo is selected if a plurality of ultrasonic echoes having an amplitude representing a local maximum were determined for a transmitting position ultrasonic echo signals are selected if only an individual ultrasonic echo having an amplitude representing a local maximum was determined for an adjacent transmitting position at least the selected ultrasonic echo signals are evaluated.. . ... Areva

03/09/17 / #20170067839

Photothermal examination method and corresponding examination unit

A photothermal examination method and corresponding examination unit are provided. In the method first and second zones of the surface to be characterized are scanned simultaneously, and first and second photosensitive surfaces separate from one another acquire images of the infrared radiation emitted by these two zones.. ... Areva

02/02/17 / #20170030869

Method for testing a workpiece using ultrasound

. . The invention relates to a method for testing a workpiece using ultrasound, wherein an ultrasonic probe generates an ultrasound signal which has a central beam and which is coupled into the workpiece under test, and the central beam is guided along a predefined path on the surface of the workpiece, the central beam and the workpiece being moved in opposite directions at least along a portion of the path.. . ... Areva

02/02/17 / #20170030338

Air duct for wind power plant, wind power plant, method of manufacturing an air duct ...

An air duct for a wind power plant is configured to guide air along a circumference of a supporting structure, in particular a tower, of the wind power plant. The wind power plant also includes an air guide and provides methods of manufacturing the air guide for the wind power plant and retrofitting the wind power plant with the air guide.. ... Areva

01/26/17 / #20170024878

Inspection video radiation filter

A method for filtering radiation on a ccd based camera inspection video, the method including: capturing video signals via the camera; converting the video signals to a plurality of digital video frames; identifying radiation bright spots, defined as xnoids, in a pixel of at least one of the frames, replacing the xnoids and surrounding pixels with corresponding pixels of another of the frames to create a filtered frame. A system for the inspection of a nuclear power plant comprising: a camera; and a computer, the computer configured to execute identifying xnoids in a pixel of at least one digitized video frame and replacing the xnoids and surrounding pixels with corresponding pixels of another of the frames to create a filtered frame.. ... Areva

01/05/17 / #20170004894

Nuclear facility

A nuclear facility includes a fuel element pool which is filled with a cooling liquid. A fuel element rack, which is disposed in the fuel element pool, includes compartments for receiving fuel elements. ... Areva








ARCHIVE: New 2018 2017 2016 2015 2014 2013 2012 2011 2010 2009



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