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| Number | Title | Issue Date |
| 5610960 | Fuel spacer and fuel assembly With an arrangement that the axial distance from the upper end of a first opening area to the upper end of the second opening area is equal to the axial distance from the upper end of a first coupling member to the upper end of a second coupling member, w... | 03/11/1997 |
| 5319692 | Nuclear reactor reflector A nuclear reactor reflector is disclosed that comprises a stack of reflector blocks with vertical water flow passages to cool the reflector. The interface between blocks is opposite support points for reactor fuel rods. Water flows between the reflector a... | 06/07/1994 |
| 5263069 | Pressurized water reactor with solid partitioning A pressurized water reactor has a solid reflector formed of a stack of rings each completely surrounding the reactor core, whose internal periphery matches the external contour of the core. Keys fixed to the casing project into vertical grooves formed in ... | 11/16/1993 |
| 5017333 | Multi-region reactor core pebble bed high temperature gas reactor A multi-region reactor core pebble bed high temperature gas reactor comprises a pebble bed reactor core housed within a pressure vessel and charged with spherical fuel. The reactor core is surrounded by a reflector wall comprising a partition wall which p... | 05/21/1991 |
| 4996019 | Storage container for radioactive waste In order to ensure a good seal and a good resistance to shocks and corrosion, without increasing their cost, radioactive waste storage containers are completely made from metal fiber-reinforced concrete. This material is used for producing by molding a dr... | 02/26/1991 |
| 4925624 | Pressurized water nuclear reactor with solid partitioning A pressurized water nuclear reactor with solid partitioning comprises a core formed by assemblies of prismatic shape disposed side by side inside a vertical cylindrical casing. A space between the core and the casing receives a solid partitioning structur... | 05/15/1990 |
| 4923670 | Roof reflector for a nuclear reactor A roof reflector comprising at least three individual layers of tapered layer elements combined in the form of vertical columns. Each column rests on a block column of the lateral reflector. Individual elements are secured by wedges and dowels to permit v... | 05/08/1990 |
| 4849157 | Core barrel for a high-temperature nuclear reactor Core barrel for a high-temperature nuclear reactor, including internal parts formed of an inner layer of graphite blocks stacked on each other and an outer layer of carbon blocks stacked on each other together forming columns, the blocks of the respective... | 07/18/1989 |
| 4816212 | Graphite side reflector A high temperature reactor having a reactor core filled with spherical fuel elements is provided comprising a graphite side reflector including at least one nose-like projection protruding radially into the reactor core from said graphite said reflector, ... | 03/28/1989 |
| 4735028 | Earthquake-resistant, removable partition In order to seal an opening formed in a vertical wall, a removable partition is formed, which is constituted by at least two dry-stacked brick layers. Each layer is formed from several rows of bricks, each constituted by bricks which, in cross-section, ar... | 04/05/1988 |
| 4728492 | Roof reflector for a small high temperature reactor A roof reflector for a small, high temperature reactor with a hot gas collector space arranged above the roof reflector comprises a side reflector arranged under the roof reflector around a reactor core with a thermal side shield arranged around both the ... | 03/01/1988 |
| 4676948 | Nuclear reactor control rod A control rod for a nuclear reactor wherein plates of neutron absorbing material (e.g. hafnium) are used in the upper portion thereof and tubes containing a different neutron absorbing material (e.g. boron) are positioned beneath the plates. To relieve th... | 06/30/1987 |
| 4569820 | Nuclear reactor core and fuel element therefor The present invention relates to a nuclear reactor core and fuel elements therefore. Stackable fuel elements, having the usual coolant holes machined therethrough, are formed with grooves along their vertical extent for alignment with similar grooves on a... | 02/11/1986 |
| 4383325 | Vessel or tank bottom for a pebble-bed reactor Vessel bottom for a gas-cooled pebble-bed reactor, including a multiplicity of blocks having inclined upper surfaces and being disposed adjacent each other side by side with gaps forming therebetween during operation of the reactor, each immediately adjac... | 05/10/1983 |
| 4352778 | Device for holding and supplying with liquid metal an assembly for a nuclear reactor core The fuel assembly is supported by means of a cylindrical supporting member which is introduced into a shore of the cross-member. The foot of the fuel assembly is introduced into the upper part of the cross-member. Orifices, coinciding with those made with... | 10/05/1982 |
| 4300984 | Top reflector for a nuclear-reactor vessel A top reflector for a nuclear-reactor vessel, i.e. the containment for a nuclear-reactor core, especially of a high-temperature or pebble bed reactor, is composed of laterally contiguous bodies (e.g. of graphite) which can be suspended from a support and ... | 11/17/1981 |
| 4290852 | Roof reflector for a gas-cooled pebble-bed reactor and process for the disassembly of the roof reflector The invention concerns a roof reflector suspended from the thermal cover shield of a gas-cooled pebble-bed reactor with a plurality of passages for absorber rods arranged in a triangular lattice, and with channels for the passage of the cooling gas. The r... | 09/22/1981 |
| 4257845 | Mixing and distributing device for gases having high temperature Mixing and distributing device for gases having high temperature includes a multiplicity of polygonal blocks stacked in a plurality of layers above and laterally adjacent one another, the blocks being formed with channels having respective axes disposed a... | 03/24/1981 |
| 4189347 | Base for vessel subject to high temperature, especially for a pebble bed reactor vessel In a reactor vessel for pebble beds at high and varying temperatures having a side wall and a base formed of a multiplicity of stacked blocks of heat-resistant material and held together by an outer cylindrical or polygonal ring and supported on a foundat... | 02/19/1980 |
