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8638900 Nuclear reactor alignment plate configuration  
An alignment plate that is attached to a core barrel of a pressurized water reactor and fits within slots within a top plate of a lower core shroud and upper core plate to maintain lateral...
8596227 Steam generator  
A steam generator with a heating gas duct which in an approximately horizontal heating gas direction is exposed to throughflow of a heating medium is provided to ensure a reliable absorption of the...
8355481 Pressure vessel sliding support unit and system using the sliding support unit  
Provided is a sliding support and a system using the sliding support unit. The sliding support unit may include a fulcrum capture configured to attach to a support flange, a fulcrum support...
8333170 Buckstay system  
A buckstay system is described comprising horizontal buckstays for the walls of a steam generator, for example in plural vertically space assemblies tied with vertical buckstays, in which a...
8170174 Simplified jet pump riser brace clamp  
An embodiment of the present invention takes the form of an apparatus or system that may reduce the level of vibration experienced by an inlet riser or other similar object within a reactor...
8107584 Apparatuses and methods for damping nuclear reactor components  
Example embodiment damping devices may include a housing capturing a piston. The housing may be filled and/or able to be filled with a damping fluid compatible with the nuclear reactor coolant, so...
8077824 Support arrangement  
A nuclear reactor includes a reactor pressure vessel 12 and a core barrel 14, contained within the reactor pressure vessel 12. The reactor 10 further includes a single vertical support 16, for...
7822167 Nuclear facility and method for operating a nuclear facility  
A technical installation, especially a nuclear power plant, has a number of system components that are respectively supported by a number of beams, and a number of pressurized conduits. The...
7685878 Apparatus for structural testing of a cylindrical body  
Two transducers to be rotated around a circumferential location on a cylindrical body for structural testing of the body are carried on a mounting and drive apparatus including a magnetic...
7668281 Method and tooling for dismantling, casking and removal of nuclear reactor core structures  
A method is provided for removing radioactive internals structural members in the core of a reactor pressure vessel in a containment vessel. The method includes placing a first cask in a first...
7627074 Vertical spring wedge  
A vertical spring wedge restores a tight fitup against an adjacent structure, such as between an inlet mixer and an adjacent restrainer bracket in a boiling water nuclear reactor jet pump. The...
7418072 Spacer  
A spacer for a fuel assembly for a light water nuclear reactor contains a plurality of intercrossed segments, which form a grid. The segments are formed from first and second metal strips which are...
7357100 Heat exchanger tube panel module, and method of constructing exhaust heat recovery boiler using the same  
A necessary size and number of modules each obtained by housing a member including heat exchanger tube panels each comprising a heat exchanger tube bundle and headers for the heat exchanger tube...
6813327 Core support for an F-lattice core of a boiling water nuclear reactor  
A core plate assembly for a nuclear reactor includes a plurality of support beams, a flat plate positioned on top of the support beams, a plurality of control rod guide tube openings arranged in...
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...
6570950 Nuclear plant containment with prefabricated component support structure  
A nuclear steam supply containment system employing prefabricated component supports that are surrounded by steel concrete forms and anchored to the floor liner of a nuclear containment. The...
6520123 Expansion cage  
An open-webbed cage support device providing support that enabling a mechanical device such as a thermal expansion tank to be suspended or mounted adjacent to the thermal water heating device...
6389094 Integral forged shroud flange for a boiling water reactor  
A forged upper shroud section which may be machined from a single piece rectangular cross-section ring forging and includes a circular flange and a cylindrical shell is described. Openings and...
6351510 Nuclear plant  
A nuclear power plant comprising a casing which encloses a primary space, a reactor vessel arranged in the primary space, and a reactor core provided in the reactor vessel. The plant further...
6233301 Jet pump sensing line T-bolt clamp electrode discharge machining tool  
An electrode discharge machining (EDM) apparatus for machining slots in a jet pump diffuser in a nuclear reactor pressure vessel is described. The apparatus is configured to machine a plurality of...
6173027 Primary containment vessel  
A primary containment vessel comprises an outer peripheral concrete wall surrounding a reactor pressure vessel, a pipe arrangement of a reactor water recirculation system and other reactor systems...
6160864 Seismic isolators  
A seismic load suppressing system for a nuclear reactor that reduces the seismic input to the reactor and the internal components of the reactor including the fuel is described. The seismic load...
6091791 Shroud attachment for a boiling water reactor  
A shroud attachment assembly which provides both structural support for the shroud and a seal between the shroud and shroud support is described. In one specific embodiment, the shroud attachment...
6021170 Nuclear reactor plant having a reactor pressure vessel with a core barrel and method for mounting the core barrel  
A nuclear reactor plant includes a reactor pressure vessel having a core barrel supported on a cylindrical holding structure fixed in the reactor pressure vessel. The core barrel has a lower part...
6009137 Mid-shroud joint for a boiling water reactor  
A mid-shroud joint which improves the replaceability of the shroud is described. In one embodiment, the shroud includes a core shroud and a lower shroud. A core plate support flange is clamped...
5930320 Assemblies and methods for mitigating effects of reactor pressure vessel expansion  
Support assemblies for allowing RPV radial expansion while simultaneously limiting horizontal, vertical, and azimuthal movement of the RPV within a nuclear reactor are described. In one embodiment,...
5864594 Apparatus and method for replacing internal components in a nuclear reactor  
An apparatus and method are provided for replacing the existing lower internal components in a nuclear reactor vessel with new components. The alignment of the new lower internals to the pressure...
5802129 Mechanically joined replacement shroud for boiling water nuclear reactor  
In a pressure vessel of a nuclear reactor containing a core assembly enclosed within a core shroud, the core shroud spaced radially inwardly of a pressure vessel wall, with an annular shroud...
5746540 Method of isolating a nuclear reactor or other large structures  
A method of entombing a nuclear reactor where the reactor with its bio-shield remains intact. An access shaft, several lateral adits, and several chambers below the reactor location are excavated...
5740216 Vertical seismic isolation structure of common deck system for nuclear reactor components  
A vertical seismic isolation structure is capable of achieving vertical seismic isolation of nuclear reactor components connected to each other by primary pipings, while suppressing the relative...
5683216 Spring latching mechanisms for preventing relative movement of assembled components  
Spring latching mechanisms for preventing relative rotation or relative displacement of assembled components during operation of a nuclear reactor. The first type of mechanism prevents rotation of...
5640434 Miniaturized nuclear reactor utilizing improved pressure tube structural members  
The present invention relates to a miniaturized nuclear utilizing improved pressure tube structural members. More particularly, the present invention relates to a new miniaturized nuclear reactor...
5610962 Construction of nuclear power plants on deep rock overlain by weak soil deposits  
A nuclear power generation complex constructed on a stratum of rock overlain by soil deposits. All major structures in the power generation complex (i.e., reactor, turbine, radwaste and control...
5608767 Neutron-activated direct current source  
A device for generating direct current by neutron activation of a plurality of series-connected beta-emitter (nuclear decay electron) cells, located in the out-of-core region of a light water...
5574760 Method and apparatus for supporting a shroud in a nuclear reactor  
In order to eliminate the need to weld, drill or otherwise machine a shroud structure which is used to surround a plurality of fuel assemblies in a nuclear reactor, a plurality of upper hanger rods...
5550883 Vessel of a nuclear reactor, including means for holding its lower internals and method of adjusting the holding means  
The vessel of the nuclear reactor includes at least three assemblies (22) distributed around the periphery of the core support plate (25), each comprising a key (26) fixed to the inner surface of...
5430779 Apparatus for supporting a shroud in a nuclear reactor  
In order to eliminate the need to weld, drill or otherwise machine a shroud structure which is used to surround a plurality of fuel assemblies in a nuclear reactor, a support ring which either...
5379331 Transverse holding device for a steam generator of a pressurized water nuclear reactor, and for its adjustment  
An adjusting and positioning assembly for a bearing element (55), constituted by a nut (52) carried by a base plate, (40) fixed on a wall of a concrete structure in which the component is arranged,...
5301212 Apparatus for dismantling an irradiated component of a nuclear reactor by the cutting of its wall  
The irradiated component (1) comprises at least one tubular wall with its axis vertical and fastened inside a well (2) in a concrete structure (3). The connecting elements between the concrete...
5278880 Pressurizer tank upper support  
A pressurizer tank in a pressurized water nuclear reactor is mounted between structural walls of the reactor on a substructure of the reactor, the tank extending upwardly from the substructure. For...
5268944 Nuclear reactor having a polyhedral primary shield and removable vessel insulation  
A nuclear reactor is provided having a generally cylindrical reactor vessel disposed within an opening in a primary shield. The opening in the primary shield is defined by a plurality of generally...
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...
5217681 Special enclosure for a pressure vessel  
A prestressed pressure vessel safety enclosure is used as a pressure safety enclosure for a nuclear reactor pressure vessel or other primary system vessel containing fluid or gaseous material under...
5204054 Nuclear reactor pressure vessel  
A nuclear reactor system pressure vessel comprises a steel inner liner part, an intermediate insulative layer part and an outer pre-stressed concrete part encasing these parts. Use of the...
5198184 Reactor containment vessel  
A reactor pressure vessel is disposed in a reactor containment vessel and is supported by a pedestal having a cylindrical structure. The inside of the reactor containment vessel is divided into...
5124114 Movement detection system  
In a system for detecting abnormal movement of a part of a gas-cooled nuclear reactor, for example abnormal tilting of a boiler unit caused by failure of a boiler support, a tracer material is...
5075073 Foreign object separator for a reactor cooling system  
A nuclear reactor includes a spaced sidewall and a core shroud defining a flow passage for channeling a coolant. A foreign object separator includes an arcuate endwall extending from the sidewall,...
5024804 Swinging support for nuclear power plant pressurizer valves  
A support system is provided for a pressurizer relief and safety valve system in a nuclear power plant. The pressurizer has a generally cylindrical vessel wall topped with a dome-like member. The...
4923338 Process for lowering building structures  
The process herein disclosed to lower into the ground building structures, such as shutdown nuclear power plants or building structures to be erected as they are lowered. A caisson for supporting...
4875836 Self-sucking pump apparatus for liquids  
The pump apparatus comprises a pump, suction device and a pressure container. The suction device is constructed as a structural unit and can be inserted coaxially from above into the pressure...
Matches 1 - 50 out of 168 1 2 3 4 >