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4514110 |
Gate assembly for ponds
A gate assembly for sub-dividing a pond or reservoir into separate compartments comprises a gate (1) vertically slidable in a cooperating frame (2) secured in the floor and side walls of the pond....
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4513205 |
Inner and outer waste storage vaults with leak-testing accessibility
A storage arrangement for waste materials of the type which tend to pollute the environment consisting of a waterproof reinforced concrete vault, preferably located underground, and a permanent...
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4511499 |
Apparatus for dismantling and disposing of fuel assemblies
Method and apparatus for dismantling, shearing and compacting a fuel assembly frame skeleton. A frame is provided which can be placed into the transfer canal of a fuel-handling building for...
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4511500 |
Method and devices for producing exchanges in reservoirs used for storing radioactive materials
In a pool type storage system for storing radioactive waste submerged within water therein, autonomous, dismountable, multi-section exchange units are provided which are submerged directly within...
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4507840 |
Method for compacting nuclear reactor components
A method is disclosed for the compaction of control rod blades and fuel channels of a boiling water reactor. Upper and lower portions of a control rod blade are removed from a cruciform shaped main...
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4508969 |
Device for holding, transporting and final storing of burned-out reactor fuel elements
The invention relates to a device for holding, transporting and final storing burned-out reactor fuel elements comprising a hollow-cylindrical container that can be closed with a cover. On its...
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4507390 |
Chromatographic analysis for anions involving complexing anions with a polyhydric alcohol
Process for analyzing anions in a liquid by means of an ion exchanger and by complex formation with specific anions by addition of polyhydric alcohol. Sensitivity is increased owing to the fact...
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4501146 |
Detection of free liquid in containers of solidified radioactive waste
A method of nondestructively detecting the presence of free liquid within a sealed enclosure containing solidified waste by measuring the levels of waste at two diametrically opposite locations...
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4500227 |
Process and geological installation for the removal of radioactive waste
It comprises in combination a series of vertical shafts for passing the waste down into the subsoil, and for ventilation purposes, linking the ground surface to the very deep storage location; a...
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4497770 |
Storage structure for nuclear waste
A storage structure for storing radioactive materials. It includes tubular storage members provided near the bottom thereof with a plurality of horizontal bolts the longitudinal axes of which...
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4498011 |
Device for receiving, moving and radiation-shielding of vessels filled with expended reactor fuel elements
The invention concerns a device for the receiving, moving and radiation-shielding of vessels filled with expended reactor fuel elements. The device consists of a protective container having a base,...
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4497775 |
Apparatus for storing hydrogen isotopes
An improved method and apparatus for storing isotopes of hydrogen (especially tritium) are provided. The hydrogen gas(es) is (are) stored as hydrides of material (for example uranium) within...
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4495139 |
Radioactive-waste container with leak monitor
A container has a massive metallic vessel whose interior is adapted to receive radioactive waste and whose mouth is formed with inner and outer spaced generally planar and annular vessel shoulders...
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4493792 |
Method and apparatus for minimizing diversion of radioactive samples from a nuclear fuel sampling system
Method and apparatus for minimizing diversion of radioactive samples from a nuclear fuel sampling system. The apparatus includes a sampler for drawing a radioactive sample from a remote vessel...
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4491540 |
Method of preparing spent nuclear fuel rods for long-term storage
Spent fuel rods from a nuclear reactor are enclosed in a body of copper, the fuel rods being embedded in copper powder in a copper container provided with a copper lid. The container with its...
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4488048 |
Container for the storage of radioactive material
In a container for the storage of radioactive material comprising an inner casing for receiving the material and an outer casing made of a ceramic material which surrounds the inner casing, it is...
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4487356 |
Device having expandable mandrel for making nuclear fuel element storage tubes
A device for manufacturing containers for storing nuclear materials. The purpose of the device is to maintain angular sheet metals in the precise position required during the welding operation...
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4486512 |
Radioactive waste sealing container
A low- to medium-level radioactive waste sealing container is constructed by depositing a foundation coating consisting essentially of zinc, cadmium or a zinc-aluminum alloy over a steel base, then...
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4485068 |
Installation for storing and/or transfer of dangerous products
Installation for the storage and/or transfer of dangerous products, wherein it comprises a storage enclosure defining at least one loading and unloading station and a plurality of storage stations,...
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4483790 |
Method of disposing of shut-down nuclear power plants
A shut-down atomic power plant or a section thereof, particularly the nuclear reactor, is disposed of by sinking it to below ground level by constructing a caisson with cutting edges from the...
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4481165 |
System for handling and storing radioactive waste
A system and method for handling and storing spent reactor fuel and other solid radioactive waste, including canisters to contain the elements of solid waste, storage racks to hold a plurality of...
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4476394 |
Insertion canister for radioactive material transportation and/or storage containers
Known containers for the transportation and/or storage of irradiated fuel elements have insertion canisters made of steel or massive bodies of non-ferrous metals. These have a high weight and...
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4475860 |
Apparatus for discharging radioactive waste from its container
An apparatus for discharging radioactive waste from its container comprises a truck movable toward and away from the container by a driving motor, a seizing member including claws capable of...
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4474727 |
Arrangement for storing spent nuclear fuel rods at a reactor site
Apparatus and method for providing on-site storage of all spent fuel rods removed from a nuclear reactor during its lifetime. Spent fuel rods are removed from spent fuel assemblies and stored in a...
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4472347 |
Container for the long time storage of radioactive materials
There is described a container for the long time storage of radioactive materials, especially spent fuel elements, in suitable geological formations which guarantees an intact barrier for a long...
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4470950 |
Storage arrangements for nuclear fuel elements
A storage container for one or more nuclear fuel elements of the kind having a tubular storage vessel (1) within an outer jacket (11), incorporates between the walls of the container and the jacket...
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RE31661 |
Spent nuclear fuel storage racks
A storage rack in which a plurality of tubular shrouds are assembled together in a checkerboard arrangement, each shroud having side walls arranged to absorb subatomic particles such as neutrons....
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4465201 |
Conical O-ring seal
A shipping container for radioactive or other hazardous materials which has a conical-shaped closure containing grooves in the conical surface thereof and an O-ring seal incorporated in each of...
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4462200 |
Method and device for the removal of the suction tube of a glass-filled final storage container
A device for disposing of a contaminated suction tube connected to a storage container for glass-enclosed radioactive waste material by inserting the tube in the container for ultimate disposal...
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4462955 |
Support device positioned between an element of large mass and a fixed support
An anti-earthquake support device arranged between an element of large mass and a fixed support, comprising roller elements arranged between support parts forming roller tracks inclined with...
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4458458 |
Lined tank and method for fabricating the same
A lined tank comprises a plurality of lining plates attached to the inside surface of the tank, concrete shutterings disposed inside of the lining plates and embedded in concrete, shaped steel...
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4459260 |
Dry storage of irradiated nuclear fuel
A concrete cell structure for storing irradiated nuclear fuel has air inlets in the roof and a stack for effecting natural draught ventilation. Air flows through the cells in heat exchange with...
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4457888 |
Nuclear poison box base construction
A storage box insert for spent nuclear fuel rods has a structure mounted near its lower end to form a support for the rods within the storage box. The support structure comprises five separate...
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4456827 |
Transportation and/or storage containers for radioactive material
An improved container for transportation or storage of radioactive substances, especially spent nuclear fuel elements, has a cylindrical open-top thick-wall metallic body for shielding gamma...
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4453857 |
Method for storing hazardous or toxic waste material
Hazardous or toxic waste material is permanently stored by sealing the material in sealed containers within an otherwise solid concrete block buried in the earth. A concrete chamber with integrated...
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4452478 |
Nuclear waste storage process and system
A system to transport and deposit nuclear wastes for disposal into abandoned or dry oil wells or other wells or deep holes. The system includes a device for connecting to a canister which holds...
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4451173 |
Storage pond
A pond for the storage of hazardous materials, such as irradiated nuclear fuel elements, under water. Upper (8) and lower (6) impervious membranes extend without interruption beneath the floor (1)...
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4451739 |
Container for radioactive materials
Containers for the transportation and/or storage of radioactive materials, particularly irradiated fuel elements needing a shielding for keeping back the radioactive rays. Previously known...
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4450134 |
Method and apparatus for handling nuclear fuel elements
An improved method and apparatus for transferring nuclear fuel elements between a fluid-filled storage pool and a cask is disclosed. The cask is supported within and is restrained by a tank which...
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4447730 |
Transportation and/or storage containers for radioactive materials
A transportation container for radioactive materials, especially for irradiated fuel elements, has a cylindrical body of a material to shield gammaradiation. The exterior of the body is provided...
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4446098 |
Spent fuel consolidation system
The spent fuel consolidation system provides a system for vertically and remotely dismantling an irradiated nuclear fuel assembly while the fuel assembly remains submerged in a coolant and for...
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4441242 |
Spent fuel consolidation system
The spent fuel consolidation system provides method and apparatus for remotely vertically and horizontally compacting an array of spent fuel rods while the fuel rods remain submerged in a coolant....
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4439905 |
Installation for replacing a contaminated fluid circuit and process for replacing this member
The present invention relates to an installation for replacing a member in a contaminated fluid circuit. It also relates to a process for replacing this member. Installations for treating...
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4440718 |
Fuel assembly transfer device for breeder nuclear reactor
A dismountable and movable device for the transfer of fuel assemblies for a breeder nuclear reactor, comprising a platform (11) mounted for rotation on a support (12) resting on the structure of...
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4437578 |
Container and closure means for storage of radioactive material
In the final storage of radioactive substances in containers, these containers must be sealed so as to be gas-tight by means of a cover, before they are taken to the final storage place. In order...
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4436693 |
Non-impacting loose rod storage canister
A canister for holding loose nuclear fuel rods for containment within a cell of a pool storage rack. The canister is designed with lateral restraints at both its bottom and its top to substantially...
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4435358 |
Means for fixation of spent nuclear elements
A storage device for nuclear plants for storing spent fuel elements in such a way as to preclude relative movement between the walls of the element storing chamber and the fuel element. The...
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4435357 |
Support for used fuel rods in nuclear installations
A storage device for receiving spent nuclear fuel elements comprising a plurality of chambers which are separated by partitions from each other. The partitions form arches in such a way that...
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4434092 |
Method for preparing radioactive control rods from nuclear reactors for storage or disposal
Spent control rods from nuclear reactors are prepared for disposal by cutting off their handle ends and their velocity limiter ends by a cut off saw positioned in a pit underwater. The saw is...
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4432942 |
Apparatus for filling a container with radioactive solid wastes
In apparatus for filling a container suitable for storage with radioactive solid wastes arising from atomic power plants or the like, a plasma arc is irradiated toward a portion of the wastes to...
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