Societe Technique Pour L'energie Atomique

Nexter Systems

Giat Industries

Sociéteé Technique Pour L'energie Atomique

Michel Brun

Sylvain Carlier

Bernard Timmer

Xavier Descatoire

Benoit Pizon

Laurent Candillier

Charles Dumanois

Antoine Saunier

Vincent Venaille

François Donnier

Sandrine Spyckerelle

Virginie Vincent

Jérémy Mathieu

Jeremy Mathieu

A nuclear reactor control assembly includes a reactivity control device comprising a control rod cluster and a drive rod. The control rod cluster comprises an attaching head. The drive rod comprises an attaching device for connecting the drive rod to the attaching head. The attaching device is movable between a connection position and a disconnection position. The drive rod and the attaching device define an axial trough recess forming a sleeve. A checking device is used for checking separation between the control rod cluster and the drive rod. The checking device comprises a probe rod which is free to move translationally in the sleeve. A lower end of the probe rod can abut the attaching head. Relative displacement of the probe rod with respect to the drive rod can be used to determine whether the drive rod is separated from the control rod cluster.

Arrangement for checking disengagement between a nuclear reactor control cluster and a drive rod

A nuclear reactor () includes a vessel () has a central axis (X); and a core () arranged in the vessel (). The core () includes a plurality of nuclear fuel assemblies, a primary water layer () separating the core () from the vessel () radially from the central axis (X) and surrounding the core (); and a system () for controlling and protecting the nuclear reactor. The control and protection system () includes a device () for continuously measuring the neutron flux emitted by the core (). The measuring device () includes at least one neutron detector () arranged in the primary water layer () separating the core () from the vessel ().

Nuclear reactor with in-vessel ex-core neutron detectors and corresponding control method

A vessel electrical penetration assembly for a feed-through of nuclear reactor vessel, the assembly including: a docking tube to form an extension of the secondary containment barrier of the reactor, the docking tube including: a first end to be positioned in the interior of the vessel and to be mechanically and sealably connected to an actuator in the interior of the vessel, and a second end to be mechanically and sealably secured to the vessel; a seal-tight electrical bar that passes through the docking tube and having on either side seal-tight connectors ensuring an electrical link between the actuator and the exterior of the reactor; the seal-tight electrical bar including a system for limiting a leakage of primary liquid to the exterior of the vessel if the secondary containment barrier extension fails; and a mechanical maintaining system for securing, under the required pressure conditions, the electrical bar to the vessel.

Vessel electrical penetration assembly for a nuclear reactor

A nuclear reactor vessel includes a shell () having a wall () traversed by at least one passage () having a central axis (C) and a valve () mounted in the passage (), the valve () having a determined outer cross-section. The passage () has an inner end segment () that opens into the inner volume () and an outer end segment () that opens into an outer piping (), the valve () being housed in the inner end segment (). The valve () is capable of being extracted from the passage () through the inside of the vessel (). The outer end segment () has at least one portion having an inner cross-section, perpendicular to the central axis (C), that is smaller than the outer cross-section of the valve (), such that the valve () cannot be ejected out of the vessel ().

Nuclear reactor and nuclear reactor vessel equipped with non-ejectable valve

A nuclear reactor () includes a vessel () containing a primary liquid, a core () comprising nuclear fuel and arranged in the internal volume of the vessel (), at least one primary pump generating a main primary flow () of primary liquid in the vessel (), at least one control member () for controlling the reactivity of the core (), at least one movement mechanism () for moving the control member (), arranged in the internal volume of the vessel () and linked to the control member (), and a pressurizer () situated in a top portion of the vessel (). The movement mechanism () comprises an electrical actuator and a transmission mechanism. The electrical actuator is completely immersed in the primary fluid and situated outside the main primary flow ().

Integrated nuclear reactor architecture limiting the stress applied to the integrated mechanisms

A housing intended to be arranged on a vehicle, in particular a military vehicle, and having a substantially parallelepiped shape including a front wall and a rear wall that each includes at least one bore for allowing air to flow inside the housing. At least one of the front or rear walls carries a plate, arranged outside the housing and at a distance from said wall, the housing further including at least one first slot allowing air to pass between the plate and the wall in question, and at least one second slot constituted by the gap between a lateral edge of the plate and said wall. The invention also concerns a weapon system including at least one missile launcher arranged in such a housing.

Housing intended to be arranged on a vehicle and weapon system comprising such a housing

A cap that is intended to obturate a duct for ejecting cartridges of a turret. This cap includes a circular base that is intended to allow it to be fastened to the duct, and a body shell having a spherical dome profile including a concave face and a convex face, the body shell being divided into at least four sectors by radial slits that are regularly distributed angularly, the sectors being contiguous pairwise. Another subject of the invention is a turret including a duct for ejecting cartridges equipped with such a cap.

Cap for duct for ejecting cartridges and turret including a duct for ejecting cartridges obturated by such a cap

A nuclear reactor has a pressurizer housed in a vessel. Heating elements are completely housed in the pressurizer. The nuclear reactor has electrical conductors that are the only feature leaving the vessel through electrical penetrations. The nuclear reactor can be operated to produce energy. The production of energy can be stopped, and the vessel of the reactor can be opened for performing maintenance operations on elements of the pressurizer and other components of the reactor, including fuel assembly replacement. After performing maintenance operations, the vessel of the reactor can be closed and energy production resumed.

Nuclear reactor with heating elements housed in their entirety in an integrated pressurizer

An electrical penetration assembly for a nuclear reactor vessel, mountable in an aperture of a nuclear reactor vessel, includes a penetration body including first and second ends to be positioned, respectively, inside and outside the vessel; a sealed electrical connector providing a first seal for the electrical penetration assembly, the sealed connector insulating the penetration body at the first end; a feed-through carrier flange having a plurality of unitary electrical feed-throughs, each unitary feed-through allowing a single electrical conductor to pass therethrough, thereby ensuring continuity of the electrical connections, each unitary feed-through being individually insulated by an individual insulator providing a second seal, the unitary feed-throughs insulating the penetration body at the second end; and an anti-ejection device formed by the engagement between a narrowed portion provided at each unitary feed-through and a shoulder that is larger than the narrowed portion and provided on each of the electrical conductors.

Electrical penetration assembly for a nuclear reactor vessel

A nuclear-reactor control-absorber drive mechanism includes a device for monitoring a potential situation of increase to overspeed of the absorber, configured to measure the number of control steps delivered to at least one of the first, second and third phases of the stator during a time window of preset duration or the number of rotation steps of the rotor during a time window of preset duration. The drive is also configured to compare the number of measured control steps with a preset maximum or the number of measured rotation steps with a preset maximum.

Nuclear-reactor control-absorber drive mechanism and corresponding monitoring method and nuclear reactor

An infrared camouflage device and a vehicle including such a device which includes an array of parallel pipes carrying a heat-transfer fluid for changing the thermal signature of a vehicle. This device is characterized in that it includes an inlet manifold, an intermediary manifold, a first series of first pipes connecting the inlet manifold to the intermediary manifold, a second series of second pipes connecting the intermediary manifold to an outlet manifold, each first pipe being located in the vicinity of a second pipe so as to form, at the device, an alternation of first and second parallel pipes, the inlet manifold and the outlet manifold being in the vicinity of each other.

Thermal camouflage device and vehicle comprising such a device

The invention relates to a linking pin between the chain links of a vehicle track and the connectors of these links, such pin incorporating at least one ring of a synthetic material coating, positioned between the pin and at least one link, the pin incorporating at least two supports on either side of the ring, characterized in that it comprises at least one axial bore enclosing a material incorporating a liquid phase and enabling the calories that may build up in the ring to be evacuated towards the connectors.

Linking pin for the chain links of vehicle tracks

The invention relates to a dilution and dispersion device for the exhaust and/or cooling gases of a vehicle's engine, that incorporates blades and a hub. The hub of said device incorporates means intended to reduce the loss in the gaseous flow rate generated by said gases. The flow rate loss reduction means are constituted by one or several openings in said hub or by a profiled element allowing said gases to be defected towards said blades. The blades are fastened to a ring.

Dilution and dispersion device for the exhaust and/or cooling gases of a vehicle's engine

An exhaust gas distribution device for the engine of a vehicle, wherein said device incorporates means to control the evacuation of the gases towards a classical exhaust system or else towards a specific exhaust system, said specific exhaust system incorporating means to dilute and reduce the visible, sound and infrared signatures of said vehicle.

Growing community of inventors

Simiane-Collongue, France

Michel Brun