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5353317 |
Shipping shim for nuclear reactor fuel assemblies
A shipping shim (30) for restraining nuclear fuel rods (11, 12, 13) in a nuclear fuel assembly (10) which accommodates varied sized gaps (g 1 , g 2 , g 3 , g 4 ) between fueled and non-fuel bearing...
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5342158 |
Handling and deploying radioactive sources
A radioactive source is mounted at one end of a rod and a ball-shaped coupler is disposed at the other end of the rod. An apparatus for handling a plurality of radioactive sources respectively...
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5327469 |
Arrangement for the storage of environmentally hazardous waste
An arrangement for the underwater storage of environmentally hazardous waste, particularly radioactive or chemical waste, includes at least one secondary capsule (1) in the form of a cylindrical...
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5319686 |
Dry transfer of spent nuclear rods for transporation
The spent nuclear fuel rods stored in a wet pit are extracted dry and transported dry to a transport container for dry transportation to a storage area or treatment center. The spent nuclear fuel...
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5311563 |
Storage frame for nuclear reactor fuel assemblies
A storage frame for nuclear reactor fuel assemblies includes a base plate. A plurality of shafts stand erect on and are secured to the base plate. The shafts each have a substantially rectangular...
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5307388 |
Containment structures
A containment structure (1) for storage of nuclear fuel or liquids which have been in contact with nuclear fuel includes a concrete wall (3) and a concrete floor (2) with a corrosion resistant...
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5307389 |
System for removing liquid waste from a tank
A tank especially suited for nuclear applications is disclosed. The tank comprises a tank shell for protectively surrounding the liquid contained therein; an inlet positioned on the tank for...
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5303836 |
Shipping container for highly enriched uranium
A shipping container for highly enriched uranium. A heavy duty drum containing insulation material forms an outer container. Fiberboard and plywood form the insulation material and are shaped and...
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5297917 |
Method of acting remotely in a mine shaft, in particular in a site for deep storage of nuclear wastes
A method of remote control of a mobile carriage including at least one transmit and receive antenna for movement into an underground gallery connected to the surface by a shaft provided with an...
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5278877 |
Process for dismantling buried unsheltered equipment which is at risk of contamination and possibly is irradiating, and a vessel for implementing this process
A process for dismantling equipment that is buried, unsheltered, at risk of contamination and possibly is irradiating, and a vessel for implementing this process. According to the invention, buried...
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5274682 |
Method and apparatus for storing nuclear fuel rods
A storage canister for spent nuclear fuel rods, having loading and storage configurations, has an open end and an apertured end wall, and means therein defining a plurality of rod locations. The...
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5271051 |
Combined cooling and purification system for nuclear reactor spent fuel pit, refueling cavity, and refueling water storage tank
The spent fuel pit of a pressured water reactor (PWR) nuclear power plant has sufficient coolant capacity that a safety rated cooling system is not required. A non-safety rated combined cooling and...
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5268942 |
Temporary cooling system and method for removing decay heat from a nuclear reactor
In combination with a nuclear power generating facility including a composite fuel pool including a reactor cavity and a spent fuel pool fluidly connectable to the reactor cavity, the composite...
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5265133 |
Nuclear fuel container
A container for nuclear fuel comprises a number of cells for receiving the nuclear fuel. The cells have removable lids and are disposed in a progressive manner in a parallel series relationship. A...
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5263064 |
Device for locking a fuel assembly in a transport container
The device (25, 26) comprises a tubular body (40) mounted axially movable on a flange (5) of a transport structure (4) for an object (6), a spring (36) for return of the tubular body (40) towards...
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5263063 |
Device for locking a fuel assembly in a container
The device comprises a cradle (4) having at least one supporting surface on which the object (6) rests, at least one flange (5) pivotably mounted on the cradle (4) and members (14, 16, 20) for...
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5245641 |
Spent fuel storage rack
A spent fuel rack for storing fresh fuel assemblies, or spent fuel assemblies removed from a nuclear reactor, which includes a base plate having multiple cells of modular construction welded at...
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5241572 |
Apparatus for locating a floatable platform
Apparatus for locating a floatable platform, comprises upstanding support members arranged to be adjacent to an article submerged in a liquid, and extendible members depending from the platform....
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5232657 |
Metal hydride flux trap neutron absorber arrangement for a nuclear fuel storage body
A flux trap neutron absorber arrangement for use in a fuel storage body between a pair of fuel storage cans which receive and store nuclear fuel assemblies includes separate pockets spaced from one...
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5226781 |
Process and installation for transferring products from a contaminated enclosure into a second enclosure without contaminating the latter
For transferring products from a contaminated enclosure (12) into a second enclosure (16) without contaminating the latter, it is proposed to engage on the contaminated enclosure a transportation...
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5225114 |
Multipurpose container for low-level radioactive waste
A method and an apparatus for the disposal of low-level radioactive wastes are disclosed. Under the disclosed method, the waste is first introduced into a preconstructed multipurpose container...
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5205966 |
Process for handling low level radioactive waste
A process for the continuous disposal of radioactive waste is disclosed. The process involves (a) separating materials contaminated with radionuclides into categories containing radionuclides with...
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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...
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5198183 |
Method and apparatus for close packing of nuclear fuel assemblies
The apparatus of the present invention is a plate of neutron absorbing material. The plate may have a releasable locking feature permitting the plate to be secured within a nuclear fuel assembly...
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5196161 |
Fail-safe storage rack for irradiated fuel rod assemblies
A fail-safe storage rack is provided for interim storage of spent but radioactive nuclear fuel rod assemblies. The rack consists of a checkerboard array of substantially square, elongate receiving...
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5185122 |
Gamma ray flux measurement system
Gamma radiation leaving the surface of a radioactive materials storage vessel is measured and monitored using a plurality of gamma ray absorbing calorimeters. The gamma ray energy absorbed is...
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5182076 |
Method for monitoring the emplacement of a transportable element and the tightness of its joint with a fixed structure, and the use of this method
The fixed structure (10) incorporates an abutment surface (10a) upon which a corresponding abutment surface (8a) of the transportable element (1) comes to bear, with the interposition between the...
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5180540 |
Fuel rod consolidation structure
A nuclear fuel rod consolidation structure. A storage canister has a grid structure positioned in its interior. The grid structure is provided with a plurality of hexagonally shaped individual...
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5171483 |
Method for retrievable/permanent storage of hazardous waste materials
A method for the long term storage of radioactive hazardous waste in a hollowed out chamber of salt bed in which sealed, relatively incompressible containers of hazardous materials are immobilized...
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5152958 |
Spent nuclear fuel storage bridge
A spent nuclear fuel storage bridge comprising either a stationary or mobile structure supported from the walls of a spent nuclear fuel storage pool. The structure may have either a pivotally...
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5139733 |
Transfer cupboard for a fuel assembly extracted from the core of a nuclear reactor and cooled by an integrated gas circuit
The transfer cupboard (1) comprises a solid body (2) made of a radiation-absorbing material, in which is provided an axially directed receptacle (3) for receiving the assembly (4). The cupboard (1)...
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5114666 |
Cask basket construction for heat-producing radioactive material
A cask basket construction for storing and transporting nuclear waste material, such as spent nuclear fuel assemblies or fuel rods. The construction is comprised of a plurality of individual...
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5102615 |
Metal-clad container for radioactive material storage
A container for storing and transporting radioactive material is provided comprising: a vessel, having an upwardly open cavity for accommodating radioactive material; and a cap covering the top...
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5098645 |
Container for reprocessing and permanent storage of spent nuclear fuel assemblies
A single canister process container for reprocessing and permanent storage of spent nuclear fuel assemblies comprising zirconium-based cladding and fuel, which process container comprises a...
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5096656 |
Process for monitoring the side walls of a storage cell for a fuel assembly
A detection unit (20) is moved under water inside the fuel storage pond (15), over the entire height and in the vicinity of a wall of the cell (2). The detection unit (20) comprises at least one...
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5089214 |
Apparatus for monitoring the pressure within a cask containing radioactive material
An apparatus for monitoring the pressure within a cask containing radioactive materials is disclosed. The apparatus comprises a differential pressure sensor sealingly connected to a bore that...
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5078958 |
Underground cooling enhancement for nuclear waste repository
The present invention relates to the retrievable storage of high-level nuclear spent fuel (waste). Such waste, which generates heat as it decays, is packed in sealed containers (2) which are placed...
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5073305 |
Method of evacuating radioactive waste treating container to vacuum
A method of evacuating a container to a vacuum for use in treating radioactive wastes by placing the waste into the container, evacuating, sealing off and thereafter compressing the container, the...
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5064575 |
Method and device for the loading and sealing of a double container system for the storage of radioactive material and a seal for the double container system
A container for a radioactive material in which the cover is welded to the container by a dual weld disposed in a welding gap between the cover and the container wall, the gap having a bottom...
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5063299 |
Low cost, minimum weight fuel assembly storage cask and method of construction thereof
A low cost, minimum weight cask for the storage of fuel assemblies is disclosed herein, along with a method for the construction thereof. The cask generally comprises a wall assembly for defining a...
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5055236 |
Method and apparatus for underwater remote controlled radioactive waste reduction of boiling water nuclear reactor control rods
Apparatus for cutting a cruciform shaped radioactive control rod into three separate cut sections, the cruciform shaped radioactive control rod being of the type having four substantially...
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5044846 |
Compliant tiedown system for securing a cask for transporting radioactive materials to a vehicle
A tiedown system for releasably securing a cask of the type used to transport radioactive waste to a cradle assembly that is mounted onto the deck of a trailer is disclosed herein. The tiedown...
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5042679 |
Container for storage of radioactive materials
Provision is made for a container which stores and shields radioactive material. Included in the container is an enclosure defining a hollow chamber in which radioactive material is storable. A...
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5039474 |
Apparatus for the ordered, complete filling of a container with rods, particularly rods of spent fuel assemblies from nuclear facilities, in a hexagonally close-packed structure
A filling apparatus for the ordered, complete filling of a container with rods, such as spent nuclear fuel rods, in a hexagonally close-packed structure, includes a device for orderly positioning a...
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5037601 |
Glass-pool, gas-cycle nuclear power plant
A nuclear power plant that is of a walk-away type with an encapsulated reaction core in a glass matrix pool having a reactive Thorium/U 233 composition in a containment structure that radiates...
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5035342 |
Container for nuclear fuel elements
A transport and storage container for nuclear fuel elements comprises a vessel with a removable internal structure. The internal structure defines a plurality of elongate compartments to receive...
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5032348 |
Stowage rack for nuclear fuel elements
A stowage rack is disclosed for dry transport of nuclear fuel elements in a plurality of elongated, parallel, adjacent prismatic cells. The rack is formed from first and second sets of materials,...
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5022788 |
Subductive waste disposal method
A method for the disposal of nuclear and toxic waste materials comprising the placing of waste materials into waste repositories radiating from an access tunnel constructed into a subtending...
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5016776 |
Nuclear fuel container tamper-proof closure
A tamper-proof closure 10 is inserted by means of positioning tool 20 into a nuclear fuel consolidation storage canister 30. The closure 10 includes a grooved weakened portion 44, which if it...
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5015863 |
Radiation shield and shielding material with excellent heat-transferring property
This invention relates to a shielding material used as a radiation shield of a container containing radioactive wastes. A radiation shield with an excellent heat-transferring property is fabricated...
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