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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 |
| 6519308 | Corrosion mitigation system for liquid metal nuclear reactors with passive decay heat removal systems A liquid metal nuclear reactor is described. The reactor includes a concrete reactor silo, and at least one primary vessel located in the reactor silo and coupled to a reactor shield deck. Each primary vessel is substantially surrounded by a containment v... | 02/11/2003 |
| 6185269 | Liquid metal reactor power block A seismically isolated liquid metal reactor power block is described. In one embodiment, the liquid metal reactor power block is a substantially rectangular nuclear plant with two nuclear islands and a common liquid metal service facility commonly support... | 02/06/2001 |
| 6081573 | Reactor internal equipment hoisting apparatus There is provided a reactor internal equipment hoisting apparatus which is hung down from an upper side of a reactor pressure vessel to hoist reactor internal equipment installed inside the reactor pressure vessel. The hoisting apparatus includes a suppor... | 06/27/2000 |
| 5940463 | In-vessel structure for fast reactors An in-vessel structure for a top-entry type fast reactor wherein a core is positioned in the interior of a reactor vessel, an upper core structure being provided above the core, a coolant passing through a cold leg piping inserted from an upper portion of... | 08/17/1999 |
| 5579355 | Heat dissipation system for a nuclear reactor, in particular a pressurized water reactor A nuclear reactor, in particular a pressurized water reactor, has a containment, a containment shell surrounding the containment and a concrete construction of a reactor building surrounding the containment shell. A heat dissipation system for the nuclear... | 11/26/1996 |
| 5499277 | Method and apparatus for enhancing reactor air-cooling system performance An enhanced decay heat removal system for removing heat from the inert gas-filled gap space between the reactor vessel and the containment vessel of a liquid metal-cooled nuclear reactor. Multiple cooling ducts in flow communication with the inert gas-fil... | 03/12/1996 |
| 5406602 | Passive air cooling of liquid metal-cooled reactor with double vessel leak accommodation capability A passive and inherent shutdown heat removal method with a backup air flow path which allows decay heat removal following a postulated double vessel leak event in a liquid metal-cooled nuclear reactor. The improved reactor design incorporates the followin... | 04/11/1995 |
| 5392324 | Device for and method of removing the residual power from a fast-neutron nuclear reactor at shutdown The nuclear reactor includes a fuel core (5) inside a vessel (2) and a system (1) for cooling the core (5), in which a liquid metal circulates and on which is placed at least one steam generator (15). The steam generator includes a casing (15a) in which t... | 02/21/1995 |
| 5345480 | Cooling device which can be fitted onto a remote manipulation arm and its utilization for an operation in a hostile medium at a high temperature The remote manipulation arm includes rigid sections (12, 14, 16) kept at a temperature adapted to their operation by a device comprising a vessel (37, 38, 39) surrounding each rigid section (12, 14, 16) and connected to a high-pressure coolant gas source.... | 09/06/1994 |
| 5289511 | Liquid-metal cooled nuclear reactor In a liquid-metal cooled nuclear reactor using liquid metal as a coolant and having vessels and pipings for accommodating the liquid metal coolant, at least pat of the region surrounding a coolant pressure boundary defined at outer wall surfaces of the ve... | 02/22/1994 |
| 5265136 | Sodium cooled fast reactor A sodium cooled fast ractor comprises a reactor vessel in which a liquid metal coolant is accommodated, a core disposed substantially a lower central portion of the reactor vessel in an installed state, a core support structure secured to the reactor vess... | 11/23/1993 |
| 5223210 | Passive cooling system for liquid metal cooled nuclear reactors with backup coolant flow path A liquid metal cooled nuclear fission reactor plant having a passive auxiliary safety cooling system for removing residual heat resulting from fuel decay during reactor shutdown, or heat produced during a mishap. This reactor plant is enhanced by a backup... | 06/29/1993 |
| 5190720 | Liquid metal cooled nuclear reactor plant system A liquid metal cooled nuclear reactor having a passive cooling system for removing residual heat resulting for fuel decay during reactor shutdown, or heat produced during a mishap. The reactor system is enhanced with sealing means for excluding external a... | 03/02/1993 |
| 5021211 | Liquid metal cooled nuclear reactors with passive cooling system A liquid metal cooled nuclear reactor having a passive cooling system for removing residual heat resulting from fuel decay during reactor shutdown. The passive cooling system comprises a plurality of cooling medium flow circuits which cooperate to remove ... | 06/04/1991 |
| 5013521 | Internal shell of a fast-neutron nuclear reactor comprising a thermal protection device The internal shell (6) of the nuclear reactor comprises at least one cylindrical sleeve (10) with a vertical axis. An annular enclosure (20) is arranged on the internal periphery of the cylindrical sleeve (10), at the top part thereof. The enclosure (20) ... | 05/07/1991 |
| 4978497 | Apparatus for the thermal protection of the upper support ferrule of a suspended vessel, particularly in a fast neutron nuclear reactor In order to ensure the cooling of the support ferrule of a vessel, such as the cylindrical internal vessel (14) of a fast neutron nuclear reactor, between said ferrule and an internal wall (20) containing a liquid metal at high temperature is placed a the... | 12/18/1990 |
| 4973444 | Nuclear reactor installations In a liquid metal cooled fast neutron nuclear reactor plant, surfaces (12) which are immersed in the flowing liquid metal and are vulnerable to liquid metal temperature fluctuations are provided with fins (20) defining cavities (22) for at least temporari... | 11/27/1990 |
| 4927597 | Device for cooling the main vessel of a fast neutron nuclear reactor cooled by a liquid metal The upper part of the vessel (3) is cooled as a result of the circulation of cooled sodium (27). The cooled sodium coming form the lower part of the reactor core is introduced into a first collector (15) via pipes (17) and then overflows into a second col... | 05/22/1990 |
| 4909981 | Nuclear reactor A novel liquid nuclear reactor is described which comprises a reactor vessel that is connected through upper and lower liquid conduit means to one or more satellite tanks that contain a heat exchanger means and pump means.... | 03/20/1990 |
| 4786464 | Cover plug of the core of a fast neutron nuclear reactor The cover plug (4) comprises a cylindrical barrel (8), a support plate (10), a group of vertical tubes (12) for the control rods and for the instrumentation of the core, an apertured transverse plate (28) fixed to the lower end of the barrel (8) and a tra... | 11/22/1988 |
| 4783310 | Heat barrier for use in a nuclear reactor facility A thermal barrier for use in a nuclear reactor facility is disclosed herein. Generally, the thermal barrier comprises a flexible, heat-resistant web mounted over the annular space between the reactor vessel and the guard vessel in order to prevent convect... | 11/08/1988 |
| 4767594 | Control of reactor coolant flow path during reactor decay heat removal An improved reactor vessel auxiliary cooling system for a sodium cooled nuclear reactor is disclosed. The sodium cooled nuclear reactor is of the type having a reactor vessel liner separating the reactor hot pool on the upstream side of an intermediate he... | 08/30/1988 |
| 4761261 | Nuclear reactor A novel liquid nuclear reactor is described which comprises a reactor vessel that is connected through upper and lower liquid conduit means to one or more satellite tanks that contain a heat exchanger means and pump means.... | 08/02/1988 |
| 4759898 | Fast neutron nuclear reactor having an improved core cover plug In a liquid metal-cooled fast neutron nuclear reactor which has a vessel sealed by a horizontal slab on which is suspended a core cover plug, the lower part of said plug comprises a deflecting grid, optionally duplicated by a thermal protection grid. Each... | 07/26/1988 |
| 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 |
| 4737338 | Nuclear reactor containing connecting means for connecting a reactor vessel and at least one receiver vessel Disclosed is a nuclear reactor employing a liquid metal and containing a reactor vessel, and at least one satellite vessel, and a hot and a cold leg connecting means which combine to form a continuous pathway for the flow of the liquid metal between the r... | 04/12/1988 |
| 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 |
| 4681726 | Fast breeder reactor A fast breeder reactor has a nuclear reactor container filled with a liquid metal, a reactor core disposed within the nuclear reactor container, and a first supporting structural member which is mounted to the nuclear reactor container such as to support ... | 07/21/1987 |
| 4676947 | Device for thermal protection of a component of a fast-neutron nuclear reactor The invention relates to a device for thermal protection of a component of a fast-neutron nuclear reactor consisting of at least one shell (10, 11) of a diameter smaller than the diameter of the passage (2) for the component (4) but greater than the diame... | 06/30/1987 |
| 4671922 | Nuclear reactor cooled by a liquid metal The invention relates to a nuclear reactor cooled by a liquid metal comprising a vessel (12) containing the reactor core (24), a vessel shaft (18) and a sealing slab (14). The bottom (12a) of the vessel rests on the bottom (52) of the vessel shaft via sup... | 06/09/1987 |
| 4666652 | Fast neutron nuclear reactor comprising a suspended sealing slab and main vessel A fast neutron nuclear reactor, in which the main vessel and the slab for sealing said vessel are separately suspended on the upper part of the vessel shaft. An outer ferrule of the slab is directly anchored in the vessel shaft by tie rods and is supporte... | 05/19/1987 |
| 4664876 | Fast breeder reactor A reactor core of a fast breeder reactor is supported by a core support within a reactor vessel. The reactor vessel is provided with a first or lower sodium chamber for accommodating low temperature sodium, a second or intermediate sodium chamber for acco... | 05/12/1987 |
| 4655998 | Liquid metal cooled nuclear rector constructions In a liquid metal cooled nuclear reactor with a nuclear fuel assembly in a coolant-containing primary vessel housed within a concrete containment vault, there is thermal insulation to protect the concrete, the insulation being disposed between vessel and ... | 04/07/1987 |
| 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 |
| 4613478 | Plenum separator system for pool-type nuclear reactors A plenum separator system for separating the hot plenum from the cold plenum and from the reactor vessel wall in a pool-type nuclear reactor. One or more intermediate plena containing substantially stagnant and thermally stratified coolant provide axial s... | 09/23/1986 |
| 4578238 | Fast neutron nuclear reactor Liquid metal-cooled nuclear reactor incorporating a main vessel sealed by a slab and containing the reactor core, an inner vessel placed within the main vessel and defining in the latter a hot zone filled with relatively hot liquid metal and a cold zone f... | 03/25/1986 |
| 4560530 | Device for providing protection against heat and radiation for an intermediate heat exchanger immersed in a nuclear reactor vessel A device for providing protection against heat and radiation for an intermediate heat exchanger immersed in the vessel of a nuclear reactor. In its upper part, the exchanger has an inner sleeve (8a) inside which a liquid metal circulates, and an outer sle... | 12/24/1985 |
| 4492667 | Fast neutron nuclear reactor The invention relates to a fast neutron nuclear reactor of the integrated type comprising a cylindrical inner vessel. The inner vessel comprises two concentric ferrules and the connection between the hot collector defined within this vessel and the inlet port ... | 01/08/1985 |
| 4478784 | Passive heat transfer means for nuclear reactors An improved passive cooling arrangement is disclosed for maintaining adjacent or related components of a nuclear reactor within specified temperature differences. Specifically, heat pipes are operatively interposed between the components, with the vaporiz... | 10/23/1984 |
