Paris, France
Paris, France

Areva is a French multinational group specializing in nuclear and renewable energy headquartered in Paris La Défense. It is the world's largest nuclear company. Its nuclear technology business group was created by absorbing the nuclear business line of German company Siemens; it has developed the EPR, an advanced 3rd generation pressurized water nuclear reactor.The corporate name "Areva" is inspired by the Trappist Santa María la Real monastery in Arévalo in Spain. Wikipedia.


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The present invention concerns an actuator control device (1) for controlling an actuator (3) of a power plant comprising: a plurality of input ports (10a - 10e, 104a - 104e, 106a-106e), each input port being associated to a channel (CH 0 - CH 4) and adapted to receive a control signal from a respective control system, each channel having a different priority; and a priority control circuit (100) including: a plurality of first solid state relays (K0.1, K1.1, K2.1, K3.1, K4.1, 200) comprising at least two poles, each input port (10a-10b, 104a - 104e) being connected to an input contact (A1) of a first solid state relay, wherein the poles of the plurality of first solid state relays are connected in such a way that an actuator command from a channel with a first priority supersede an actuator command from a channel with a second priority, wherein the second priority is lower than the first priority.


Patent
Areva | Date: 2017-01-04

The invention relates to a method for testing a workpiece (2) using ultrasound in a curved region (6) of the surface (4) of said workpiece, having the following steps: (a) a plurality of ultrasonic signals (14a, b) are emitted from a plurality of transmitting positions (Pa-f) at different pivot angles (Sa, b) in a pivoting range (16a, b) with the aid of at least one ultrasonic transducer (10a-f) and are injected into the workpiece (2), (b) a corresponding ultrasonic echo signal (18a, b) is received for each ultrasonic signal (14a, b), and the amplitude of the ultrasonic echo (E) produced upon entering the workpiece (2) or on the rear wall of the workpiece (2) is determined, (c) the ultrasonic echoes (E) having amplitudes representing local maxima are determined for each transmitting position (Pa-f), (d1) if an individual ultrasonic echo (E) having an amplitude representing a local maximum was determined for a transmitting position (Pa-f) in step (c), the associated ultrasonic echo signal (18a, b) of said echo is selected, (d2) if a plurality of ultrasonic echoes (E) having an amplitude representing a local maximum were determined for a transmitting position (Pa-f) in step (c) or if this is predefined for a transmitting position (Pa-f), ultrasonic echo signals (18a, b) are selected if only an individual ultrasonic echo (E) having an amplitude representing a local maximum was determined for an adjacent transmitting position (Pa-f) in step (c) by selecting those ultrasonic echo signals (18a, b) which are in a particular angle range (24) around the corresponding pivot angle (Sa,b) of the ultrasonic echo signal (18a, b) having the maximum amplitude of the ultrasonic echo (E) of the adjacent transmitting position (Pa-f) and which have an ultrasonic echo (E) having a maximum amplitude, (e) at least the selected ultrasonic echo signals (18a, b) are evaluated.


A cooling element (2) for cooling the coolant in a fuel element pond (115) in which a fuel element frame (92) is arranged for receiving fuel elements (98), wherein the cooling element (2) comprises a heat exchanger (64) which is designed for connection to a cooling circuit (120), and the cooling element should be integrated in a space-saving way in an already present fuel element pond (115). According to the invention, the cooling element (2) is dimensioned and configured in such a way that it can be arranged and/or fixed in an unoccupied position (106) for a fuel element (98) in the fuel element frame (92).


In the method of the invention first and second zones (50, 58) of the surface to be characterised are scanned simultaneously, and first and second photosensitive surfaces (56, 62), different from one another, acquire images of the infrared radiation emitted by said two zones.


Patent
Areva | Date: 2017-06-21

Fuel rod cladding (4) for a light water reactor, comprising :a core (16) comprising a matrix consisting of pure molybdenum or of a molybdenum-based alloy ; andan outer protective layer (18), said outer protective layer (18) being selected among:- a chromium-based coating (20) deposited on an outer surface of said core layer (16), said chromium-based coating (20) comprising at least one chromium-based coating layer (24) consisting of pure chromium or of a chromium-based alloy ;- a chromium-based diffusion layer (22) obtained by diffusion of chromium into the core (16) from the outer surface of the core (16) ;- a succession of a chromium-based diffusion layer (22) obtained by diffusion of chromium into the core (16) from the outer surface of the core (16) and a chromium-based coating (20) consisting of chromium or of a chromium-based alloy deposited on the


The invention proposes a device (10) for the cyclonic separation of solid particles contained in a fluid, comprising a primary cyclone chamber (12), a secondary cyclone chamber (14), an inlet channel (90) for fluid loaded with solid particles opening into the primary cyclone chamber, an outlet channel (18) for fluid cleaned of the solid particles connected to the secondary cyclone chamber, and a pipe unit (20) connecting the primary cyclone chamber to the secondary cyclone chamber and surrounded by the primary cyclone chamber. The pipe unit comprises a core (60) delimiting the secondary cyclone chamber and having at least one helical groove of which a bottom moves away from an axis (34) of the secondary cyclone chamber, moving towards the latter, and a cap (62) covering a part of the core in such a way as to delimit, with the groove, a channel (82) connecting the primary cyclone chamber to the secondary cyclone chamber.


The invention relates to gels for detecting and locating radioactive surface contamination of a solid material substrate, particularly via change in the color of the gels within the visible range or via softening, i.e. fading, of the color of the gels. The invention also relates to a method for detecting and locating radioactive surface contamination of a solid material substrate that uses said gels.


The invention relates to a method for oxidative breakdown of nitrogenous compounds in waste water by means of an electrochemical treatment using a diamond electrode as an anode (A) and a cathode (K) as a counter-electrode, wherein the destruction of the nitrogenous compounds and a reduction of the total nitrogen content can be achieved in a common method in that, in a first method step, a first current density is adjusted on the anode (A) in order to oxidize the nitrogenous compounds and subsequently, by means of a second current density which is smaller than the first current density, the dissolved total nitrogen content is reduced by releasing molecular nitrogen.


Patent
Areva | Date: 2017-01-11

The invention relates to a method for testing a workpiece (10) using ultrasound, wherein an ultrasonic probe (2, 12) generates an ultrasound signal (4) which has a central beam (Z) and which is coupled into the workpiece (10) under test, and the central beam (Z) is guided along a predefined path (18) on the surface (20) of the workpiece (10), the central beam (Z) and the workpiece (10) being moved in opposite directions at least along a portion of the path (18).


Grant
Agency: European Commission | Branch: H2020 | Program: FCH2-IA | Phase: FCH-03.1-2015 | Award Amount: 106.22M | Year: 2016

Hydrogen Mobility Europe 2 (H2ME 2) brings together action in 8 European countries to address the innovations required to make the hydrogen mobility sector truly ready for market. The project will perform a large-scale market test of hydrogen refuelling infrastructure, passenger and commercial fuel cell electric vehicles operated in real-world customer applications and demonstrate the system benefits generated by using electrolytic hydrogen solutions in grid operations. H2ME 2 will increase the participation of European manufacturers into the hydrogen sector, and demonstrate new vehicles across a range of platforms, with increased choice: new cars (Honda, and Daimler), new vans (range extended vehicles from Renault/Symbio and Renault/Nissan/Intelligent Energy) and a new medium sized urban delivery truck (Renault Trucks/Symbio). H2ME 2 develops an attractive proposition around range extended vehicles and supports a major roll-out of 1,000 of these vehicles to customers in France, Germany, Scandinavia and the UK. 1,230 new hydrogen fuelled vehicles will be deployed in total, trebling the existing fuel cell fleet in Europe. H2ME 2 will establish the conditions under which electrolytic refuelling stations can play a beneficial role in the energy system, and demonstrate the acquisition of real revenues from provision of energy services for aggregated electrolyser-HRS systems at a MW scale in both the UK and France. This has the further implication of demonstrating viable opportunities for reducing the cost of hydrogen at the nozzle by providing valuable energy services without disrupting refuelling operations. H2ME 2 will test 20 new HRS rigorously at high level of utilisation using the large vehicle deployment. The loading of stations by the end of the project is expected to average 20% of their daily fuelling capacity, with some stations exceeding 50% or more. This will test the HRS to a much greater extent than has been the case in previous projects.

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