Class / Patent application number | Description | Number of patent applications / Date published |
376353000 | With particular control rod guide structure | 9 |
20080253497 | UPPER INTERNALS ARRANGEMENT FOR A PRESSURIZED WATER REACTOR - In a pressurized water reactor with ail of the in-core instrumentation gaining access to the core through the reactor head, each fuel assembly in which the instrumentation is introduced is aligned with an upper internals instrumentation guide-way. In the elevations above the upper internals upper support assembly, the instrumentation is protected and aligned by upper mounted instrumentation columns that are part of the instrumentation guide-way and extend from the upper support assembly towards the reactor head in hue with a corresponding head penetration. The upper mounted instrumentation columns are supported laterally at one end by an upper guide tube and at the other end by the upper support plate. | 10-16-2008 |
20090196392 | Core Of A Boiling Water Reactor - A core of a boiling water reactor as a burner type core of the boiling water reactor having a ratio of 3 or more of number of fuel assemblies loaded in the core to number of control rods installed in the nuclear reactor and using an oxide of low enriched uranium having a mean enrichment of the fuel assemblies of 3 wt % to 8 wt % or a mixed oxide having a mean fissile plutonium enrichment of the fuel assemblies of 2 wt % to less than 7 wt %, wherein a ratio of an inner width of a channel box of the fuel assemblies to a width of 0.79 to 0.865, and a mean thickness of the channel box of the fuel assemblies is 2.10 to 3.55 mm. | 08-06-2009 |
20100111243 | FIXED CLUSTER HAVING A SPIDER-LIKE SUPPORT, CORRESPONDING PRESSURIZED WATER NUCLEAR REACTOR CORE AND ASSEMBLY COMPRISING A NUCLEAR FUEL ASSEMBLY AND SUCH A FIXED CLUSTER - A fixed cluster for the core of pressurized-water nuclear reactor including rods and a holder for rods. The holder includes: an upper head; fins extending radially towards the outside from the upper head; systems for mounting the rods and distributed on the fins; and at least two abutment elements on the upper plate of the core, each of the abutment elements protruding longitudinally from a respective fin beyond the mounting systems so as to be vertically oriented towards the top when the fixed cluster is provided on a nuclear fuel assembly. | 05-06-2010 |
20130114780 | NUCLEAR CORE COMPONENT - A fuel rod or control rod for a nuclear reactor that has a spacer interposed between an upper end plug and a plenum spring which extends between the spacer and the fissile or absorber material. Preferably, the spacer is a relatively thin sleeve with a radially extending lip that sits above the coil spring wound at least in part around the sleeve. | 05-09-2013 |
20130301784 | SUSPENDED UPPER INTERNALS FOR COMPACT NUCLEAR REACTOR INCLUDING A LOWER HANGER PLATE - A pressure vessel comprises an upper vessel section and a lower vessel section. A nuclear reactor core comprises fissile material contained in a containing structure and disposed in the lower vessel section. Upper internals are disposed in the lower vessel section above the nuclear reactor core. The upper internals include at least guide frames and internal control rod drive mechanisms (CRDMs) with CRDM motors mounted on a suspended support assembly including a plurality of hanger plates connected by tie rods. The plurality of hanger plates includes a lowermost hanger plate having alignment features configured to align the upper internals with the containing structure that contains the nuclear reactor core. | 11-14-2013 |
20130301785 | SUSPENDED UPPER INTERNALS FOR COMPACT NUCLEAR REACTOR INCLUDING A MID-HANGER PLATE - A pressure vessel comprises an upper vessel section and a lower vessel section. A nuclear reactor core comprising fissile material is disposed the lower vessel section. Upper internals are disposed in the lower vessel section above the nuclear reactor core and are mounted on a suspended support assembly including a plurality of hanger plates connected by tie rods. The upper internals include at least guide frames and internal control rod drive mechanisms (CRDMs) with CRDM motors. The plurality of hanger plates includes a mid-hanger plate that is not the uppermost plate of the plurality of hanger plates and is not the lowermost plate of the plurality of hanger plates. The internal CRDMs are disposed above the mid-hanger plate, the guide frames are disposed below the mid-hanger plate, and the mid-hanger plate engages both the internal CRDMs and the guide frames. | 11-14-2013 |
20130301786 | SUSPENDED UPPER INTERNALS FOR COMPACT NUCLEAR REACTOR INCLUDING AN UPPER HANGER PLATE - A pressure vessel comprises an upper vessel section and a lower vessel section. A nuclear reactor core comprising fissile material is disposed in the lower vessel section. Upper internals are disposed in the lower vessel section above the nuclear reactor core. The upper internals include at least internal control rod drive mechanisms (CRDMs) with CRDM motors and a suspended support assembly with a plurality of hanger plates connected by tie rods. The internal CRDMs are supported from beneath by a first hanger plate and are laterally aligned by a second hanger plate disposed above the first hanger plate. | 11-14-2013 |
20150354030 | TREATMENT PROCESS FOR A ZIRCONIUM ALLOY, ZIRCONIUM ALLOY RESULTING FROM THIS PROCESS AND PARTS OF NUCLEAR REACTORS MADE OF THIS ALLOY - A treatment process for a zirconium alloy is provided. The process includes the following steps:
| 12-10-2015 |
20150357055 | CONTROL ROD GUIDE TUBE WITH AN EXTENDED INTERMEDIATE GUIDE ASSEMBLY - A nuclear reactor having an upper internals control rod assembly guide tube formed from upper and lower sections that are connected along a central axial region of the guide tube at an intermediate coupling. An extended control rod axial support is provided for at least some of the control rods over a finite distance within at least one of the interiors of the lower guide tube section or the upper guide tube section. | 12-10-2015 |