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| Number | Title | Issue Date |
| 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 |
| 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 |
| 4756879 | Core cover plug of a liquid metal-cooled nuclear reactor Core cover plug for a liquid metal-cooled nuclear reactor. It comprises a structure constituted in part by suspension elements fixed to the lower plate of the small rotary plug, and in part by control rod sleeve elements and a conical deflecting plate position... | 07/12/1988 |
| 4746485 | Rotating shielded crane system A rotating, radiation shielded crane system for use in a high radiation test cell, comprises a radiation shielding wall, a cylindrical ceiling made of radiation shielding material and a rotatable crane disposed above the ceiling. The ceiling rests on an a... | 05/24/1988 |
| 4712015 | Shields for nuclear reactors A roof shield for a nuclear reactor comprises a normally fixed radially outer portion, a radially inner portion rotatable about a vertical axis, and a connection between the inner and outer portions which permits relative angular movement between the port... | 12/08/1987 |
| 4698199 | Retractable duct connectors in a nuclear reactor In a nuclear reactor of the type in which the vault has a roof in which inner and outer rotatable shields are mounted, coolant is supplied to the roof and shields via duct penetrations which extend in the plane of rotation and can be brought into alignmen... | 10/06/1987 |
| 4687624 | Liquid metal cooled fast breeder reactor A liquid metal cooled fast breeder reactor which permits a closer installation of a fuel handling mechanism relative to an upper reactor core structure of the reactor. The fuel handling mechanism has a fuel handling body without a housing, and has a rotat... | 08/18/1987 |
| 4645640 | Refueling system with small diameter rotatable plugs A nuclear reactor refueling system for a liquid metal-cooled fast breeder reactor includes a large rotatable plug (18) eccentrically mounted relative to the reactor core (12), and a small rotatable plug (24) mounted within the large plug (18). A fuel hand... | 02/24/1987 |
| 4639350 | Cover-plug for the core of a fast neutron nuclear reactor Cover-plug for the core of a fast neutron nuclear reactor, comprising a support-plate (6), a cylindrical shell (8) having a vertical axis fixed integrally to the support plate (6) and braces (14) which are transverse relative to the shell (8). Vertical tu... | 01/27/1987 |
| 4587081 | Slab for closing the vessel of a fast neutron nuclear reactor Slab for closing a fast neutron nuclear reactor, comprising a first central annular part (10) the diameter of which is substantially equal to the diameter of the reactor vessel (5) and a second peripheral annular part (11) connected to the first part (10)... | 05/06/1986 |
| 4507261 | Handling process and installation for the assemblies of a neutron nuclear reactor Installation for handling the assemblies of a fast neutron nuclear reactor comprising a core located in a vertically axed vessel and constituted by a group of assemblies positioned in a supporting grid, a horizontal slab over the vessel, a large rotary pl... | 03/26/1985 |
| 4464334 | Fast neutron nuclear reactors The invention relates to a nuclear reactor cooled by a liquid metal contained in a vessel obturated by upper closing means, said latter essentially being constituted by a slab and rotating plugs. The upper closing means comprise at least one circuit for c... | 08/07/1984 |
| 4427621 | Jacking mechanism for upper internals structure of a liquid metal nuclear reactor A jacking mechanism for raising the upper internals structure of a liquid metal nuclear reactor which jacking mechanism uses a system of gears and drive shafts to transmit force from a single motor to four mechanically synchronized ball jacks to raise and... | 01/24/1984 |
| 4397811 | Nuclear reactor with integral heat exchangers A nuclear reactor having integral heat exchangers comprises intermediate heat exchangers (35) which are entirely contained within the reactor vessel (1) and bear on the support (4) for the reactor core (5) at the periphery of the latter. Each one of the i... | 08/09/1983 |
| 4330368 | Cable handling system for use in a nuclear reactor A cable handling system for use in an installation such as a nuclear reactor is disclosed herein along with relevant portions of the reactor which, in a preferred embodiment, is a liquid metal fast breeder reactor. The cable handling system provides a spe... | 05/18/1982 |
| 4328071 | Device for guiding ducts which extend through a rotatable component Tubes or cables designated as ducts and extending through a movable component which is capable of rotational motion about a vertical axis are supported between a fixed point located externally of the movable component and a second point which is located o... | 05/04/1982 |
| 4309252 | Nuclear reactor constructions A liquid metal cooled fast breeder nuclear reactor comprising a nuclear fuel assembly submerged in a pool of coolant contained in a primary vessel is housed in a concrete vault. A core cover structure suspended from the roof of the vault and immersed in t... | 01/05/1982 |
| 4302680 | Cover construction for shielding containers for the storage and transporation of irradiated fuel elements There is provided a cover construction for a shielding container for the transportation and storage of fuel elements essentially consisting of an inner shielding cover and an outer transportation cover flanged on the cover, the inner shielding cover consi... | 11/24/1981 |
| 4288292 | Connecting apparatus for limited rotary of rectilinear motion (II) Apparatus for providing connection between two members having relative movement in a horizontal plane in a rotary or linear fashion. The apparatus includes a set of vertical surfaces affixed to each of the members, laterally aligned across a selected vert... | 09/08/1981 |
| 4178208 | Self locking drive system for rotating plug of a nuclear reactor This disclosure describes a self locking drive system for rotating the plugs on the head of a nuclear reactor which is able to restrain plug motion if a seismic event should occur during reactor refueling. A servomotor is engaged via a gear train and a bu... | 12/11/1979 |
| 4142935 | Nuclear reactor A nuclear reactor including two rotatable plugs and a positive top core holddown structure. The top core holddown structure is divided into two parts: a small core cover, and a large core cover. The small core cover, and the upper internals associated the... | 03/06/1979 |
| 4113558 | Nuclear fuel handling grapple carriage with self-lubricating bearing A nuclear fuel handling grapple carriage having a bearing with a lubricant reservoir that is capable of being refilled when the bearing and reservoir are submerged in a lubricant pool. The lubricant reservoir supplies lubricant to the bearing while the be... | 09/12/1978 |
| 4069098 | Ex-vessel nuclear fuel transfer system A system for transferring fuel assemblies between a fuel transfer area and a fuel storage area while the fuel assemblies remain completely submerged in a continuous body of coolant. A fuel transfer area filled with reactor coolant communicating with the r... | 01/17/1978 |
| 4062723 | Core access system for nuclear reactor Improved nuclear reactor arrangement to facilitate both through the head instrumentation and insertion and removal of assemblies from the nuclear core. The arrangement is of the type including a reactor vessel head comprising a large rotatable cover havin... | 12/13/1977 |
| 4050985 | Nuclear reactor A nuclear reactor, particularly a liquid-metal breeder reactor, whose upper internals include outlet modules for channeling the liquid-metal coolant from selected areas of the outlet of the core vertically to the outlet plenum. The modules are composed of... | 09/27/1977 |
| 3990942 | Removable auxiliary lid for handling the fuel elements of a nuclear reactor core The auxiliary lid permits temporary closure of the reactor core shroud during charge/discharge operations after removal of the closure head of a pressurized water or boiling water reactor. The auxiliary lid has an outer closure plug mounted for rotational... | 11/09/1976 |
