Matches 1 - 50 out of 214 1 2 3 4 5 >


Match Document Document Title
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...
6882696 Control rod for boiling water reactor and method for manufacturing the same  
A tie rod having a cruciform cross section is provided with steps for fixing sheaths at tips of cruciform arms of the tie rod; the tips of each of sheaths are fitted onto the steps of the tie rod,...
6643349 Method of removing a large-sized apparatus from a reactor building of a nuclear plant  
In order to carry out a radioactivated reactor pressure vessel from a nuclear reactor building of a nuclear power plant, a first opening portion for carrying out the reactor pressure vessel is...
6452993 Method of carrying out large-sized apparatus  
When a radioactivated reactor pressure vessel is carried out from a nuclear reactor building of a nuclear power plant, a first opening portion for carrying out the reactor pressure vessel is...
6438191 Explosive scabbling of structural materials  
A new approach to scabbling of surfaces of structural materials is disclosed. A layer of mildly energetic explosive composition is applied to the surface to be scabbled. The explosive composition...
6293593 Collar clamp assembly for repairing core spray piping  
A collar clamp assembly is disclosed for repairing and providing a temporary seal around leaking pipe coupling areas of an internal core spray system of a nuclear reactor. The clamp assembly...
6240153 Reactor stud cleaning booth  
A reactor stud cleaning apparatus is presented for cleaning studs, nuts, and washers used to secure reactor heads on nuclear reactors. The cleaning apparatus is a self-contained unit having a...
5987088 Precipitation hardening type single crystal austenitic steel, and usage the same  
In order to provide an austenitic single crystal stainless steel having preferable stress corrosion cracking resistance, strength, and irradiation induced embrittlement resistance so as to extend...
5901192 Core spray line riser apparatus and methods  
Core spray line riser repair apparatus and methods for axially restraining a reactor core spray line riser to a T-box are described. In one embodiment, the repair apparatus includes a sleeve, a...
5839192 Method and apparatus for repairing cracked core spray supply piping in a boiling water reactor  
An apparatus for repairing cracked core spray supply piping in a boiling water reactor vessel includes a pair of clamps extending circumferentially around the piping on opposite sides of a crack...
5726884 Integrated hazardous substance tracking and compliance  
Apparatus that provides an integrated approach for all management activities for hazardous substances used or generated at a facility, including form generation and compliance with the reporting...
5706321 Method for nonlinear optimization for gas tagging and other systems  
A method and system for providing nuclear fuel rods with a configuration of isotopic gas tags. The method includes selecting a true location of a first gas tag node, selecting initial locations for...
5699397 Tool for vertically supporting tie rod assembly against clevis pin on gusset plate in boiling water reactor  
A tool for vertically supporting a shroud repair tie rod assembly having a clevis hook by bracing the clevis hook against a clevis pin installed in a gusset plate. This allows the vertical support...
5675618 Mechanical plug for vessel penetration and method therefor  
In order to plug a pressure vessel penetration through which a heater was disposed, a stepped diameter hollow cylinder is provided with grafoil seals which are set on an annular shoulder defined by...
5586157 Method and apparatus for manufacturing gas tags  
For use in the manufacture of gas tags employed in a gas tagging failure detection system for a nuclear reactor, a plurality of commercial feed gases each having a respective noble gas isotopic...
5579354 Method of measuring a corrosion potential, method of simulating potential characteristics of a reaction rate, and plant monitoring system adopting them  
A system for monitoring the operation of a plant, which includes the facility of simulating the corrosion potential of a material and which can assess the effect of a countermeasure for mitigating...
5574761 Fuel channels with off-centerline welds  
A nuclear fuel channel has four corners and four elongated sidewalls disposed between the corners so as to provide a polygonal transverse cross-section. Each of the channel sidewalls has a...
5553109 Apparatus and methods for simulating a change in axial power shape during a nuclear fuel rod bundle transient  
Apparatus is provided for simulating a nuclear fuel rod bundle transient condition and includes a vessel for containing a coolant, a pair of heating elements disposed in the vessel and a power...
5465279 Reactor coolant pump seal test decontamination housing  
An arrangement of reactor coolant pump seals arranged in a generally annular stack with a plurality of stacking spacers in a test housing for emplacement in a chemical decontamination test loop...
5440600 Laminated electromagnetic pump stator core  
A stator core for an electromagnetic pump includes a plurality of circumferentially abutting tapered laminations extending radially outwardly from a centerline axis to collectively define a...
5406605 Method for designing gas tag compositions  
For use in the manufacture of gas tags such as employed in a nuclear reactor gas tagging failure detection system, a method for designing gas tagging compositions utilizes an analytical approach...
5400499 Internal bushing removal tool  
A tool for removal of the internal bushings from a piston coupling of a CRD. The tool incorporates a spring-loaded and hardened collet supported on one end of a ram. The collet has a pair of arms...
5325407 Core barrel and support plate assembly for pressurized water nuclear reactor  
Disclosed is a means for increasing coolant flow through the areas adjacent to where the removable top head closure is bolted to the body of pressurized water nuclear reactor. A circumferential...
5323435 Control rod housing support bars with wing assemblies  
A boiling water reactor control rod drive housing support bars having wing assemblies to limit the travel of a control rod in the event that a control rod housing is ruptured. The wing assemblies...
5309626 Reactor vessel head O-ring installation tool  
A tool for use in installing O-ring seals in the removable head of a nuclear reactor pressure vessel. Disclosed are two embodiments of the tool. One embodiment is adapted to fit within the stud...
5297187 Pressure vessel penetration sealing device  
A device for sealing a penetration in a pressurizer of a nuclear steam supply system includes a hollow cylinder adapted to be inserted into the heater sleeve, in place of the heater. The cylinder...
5283809 Steam separator latch assembly  
A latch assembly removably joins a steam separator assembly to a support flange disposed at a top end of a tubular shroud in a nuclear reactor pressure vessel. The assembly includes an annular head...
5282232 Nuclear reactor upper internal equipment with cluster guide devices  
Upper internals for a nuclear reactor comprise an upper core plate and a plate which supports cluster guides tubes connecting the two plates together. The cluster guides project above the support...
5272743 Key member for use in insertion or removal of a fuel rod of a nuclear fuel assembly grid  
A key member, a method for insertion and/or removal of the fuel rods in a nuclear fuel assembly using the key member and a method of disassembling the nuclear fuel assembly using the same key...
5265141 Captive fastener  
A captive fastener is joinable to a stud for being retained in a nuclear reactor. The fastener includes a head fixedly joinable to the stud, and at least one spring clip extending perpendicularly...
5200144 Simulated nuclear reactor fuel assembly  
An apparatus for electrically simulating a nuclear reactor fuel assembly. It includes a heater assembly having a top end and a bottom end and a plurality of concentric heater tubes having...
5126100 System for qualification of chemical decontamination methods for decontamination of nuclear reactor systems  
A unique and optimal method for assessing the feasibility of employing chemical decontamination processes to remove crud from nuclear reactor primary systems without adversely affecting the...
5120491 Bimetallic thimble tube  
A thimble tube for use in a guide the in a nuclear reactor. The thimble tube is an elongated hollow tube having one end closed. The portion of the tube that extends into the reactor is formed from...
5098641 Method and apparatus for measuring subchannel voids in a light water reactor test fuel assembly  
A light water nuclear reactor test assembly for emulating the performance of a nuclear boiling water reactor fuel bundle and measuring the subchannel void fraction in the two-phase region of the...
5084229 Critical heat flux test apparatus  
An apparatus for testing, in situ, highly irradiated specimens at high temperature transients is provided. A specimen, which has a thermocouple device attached thereto, is manipulated into test...
5077685 Method and apparatus for supporting the operation under radioactive rays  
Radioactivity exposure amount of workcraftmen is obtained through simulation by using an operation processor when the workcraftmen carry out work operation within an area under controlled...
5065490 Threaded insert for repairing a nuclear assembly  
A bolt insert 24 with special bolt 50 provides a fastening method to secure hard metal nuclear reactor parts 12, 14, 16 provided with aligned square EDM produced openings 18, 20, 22. The insert is...
4981642 Apparatus for form-locking torsion prevention in screw connections  
An apparatus for form-locking torsion prevention in screw connections includes a bolt with a standard bolt thread and a special nut having a free end and nut threads. A thin-walled sheath is...
4977529 Training simulator for a nuclear power plant  
A training simulator for the full-scope real-time dynamic operation of a nuclear power plant utilizes apparatus that includes control consoles having manual and automatic devices for operating...
4963319 Thermionic converter emitter support arrangement  
A support is provided for use in a thermionic converter to support an end an emitter to keep it out of contact with a surrounding collector while allowing the emitter end to move axially at its...
4960561 Nuclear reactor lower internals  
Lower internals for a reactor--typically a PWR--having a pressure vessel containing a core cooled by an upward flow of coolant and a core support include a shell defining a coolant volume between...
4885128 Method for improving performance of irradiated structural materials  
Method for extending service life of nuclear reactor components prepared from ductile, high strength crystalline alloys obtained by devitrification of metallic glasses. Two variations of the method...
4863678 Rod cluster having improved vane configuration  
A spider assembly for supporting a corresponding rod cluster in a pressurized water reactor vessel, through which the core outlet flow passes in a predetermined direction. Each spider assembly...
4859409 Reactor vessel lower internals temporary support  
A temporary support structure for supporting a lower internals assembly above the reactor vessel during inspection and/or maintenance thereof. A support bracket is bolted to the reactor vessel...
4859408 Method and apparatus for securing structural tubes in nuclear reactor fuel assemblies  
An insert for providing a reduced inside diameter for a structural tube, specifically an instrumentation guide tube, of a nuclear fuel assembly. The insert has forming lobes which coact with the...
4857264 Frictionally loaded top end supports for cantilever-mounted rod guides of a pressurized water reactor  
A pressurized water reactor of an advanced design comprises, in vertically spaced relationship, a lower barrel assembly having lower and upper core plates, an inner barrel assembly and an axially...
4857265 Wiring installation for connection of electric devices of a nuclear reactor  
A wiring installation for electrical connections of a plurality of devices of a nuclear reactor, comprising: (a) a plurality of first multiwire cables each extending at least from certain ones of...
4844859 Removable and lockable guide ring in an orifice passing through a plate and its use for a guide tube of a nuclear reactor  
Removable and lockable guide ring in an orifice passing through a plate and its use for a guide tube of a nuclear reactor. The guide ring comprises a tubular body (25), one part (25a) of which is...
4842815 Device for locking a guide ring on a plate having an orifice and its use for a guide tube of a nuclear reactor  
Device for locking a guide ring on a plate having an orifice comprising a tubular intermediate piece (22) fastened rigidly to a plate (20) so that its central orifice (36) is coaxial with the...
4830053 Fluidic devices  
A fluidic device, in particular a vortex diode, has a vortex chamber formed by spaced apart end walls and a peripheral side wall. An axial port is provided in one end wall and a further port...
Matches 1 - 50 out of 214 1 2 3 4 5 >