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7524438 |
Unsaturated polyester-based material for neutron-shielding and for maintaining sub-criticality
The invention concerns a neutron shielding material for maintaining sub-criticality based on unsaturated polymer: Said material comprises an unsaturated polyester resin, at least an inorganic boron...
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7485884 |
Radioactive substance container, manufacturing apparatus thereof and manufacturing method thereof
In the metal billet to be used for hot dilation forming, a forward side with respect to the pressing direction has a quadrate section and its diagonal length is not more than an inner diameter of a...
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7474726 |
Unirradiated nuclear fuel component transport system
An unirradiated nuclear fuel assembly component transport system that includes a clamshell-type inner liner that opens either along its axial dimension or from the top to load and unload the fuel...
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7372933 |
Radioactive-material container, metal gasket for sealing the radioactive-material container, and method of manufacturing the metal gasket
A radioactive-material container includes a container body that shields nuclear radiation, which includes a cavity that stores a basket containing a recycle fuel assembly, a lid that covers the...
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7351989 |
Fiber-reinforced concrete cask, supporting frame for molding thereof and process for producing the concrete cask
The object of this invention is to provide a fiber-reinforced concrete cask that ensures easy working, enables reducing working cost, excels in strength, durability and heat resistance and enables...
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7342989 |
Apparatuses and methods for mechanical shielding and cooling
A transport or storage cask comprises a cask body, a modular thermal conducting and shielding system and a mechanical attachment. The modular thermal conducting and shielding system includes a...
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7330526 |
System and method of storing high level waste
A system and method for storing high level waste. In one aspect, the invention is a system comprising: an inner shell forming a cavity for receiving high level waste, the cavity having a top and a...
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7330525 |
Method and apparatus for maximizing radiation shielding during cask transfer procedures
A transfer cask for maximizing the radiation shielding for spent nuclear fuel during cask transfer procedures has a cylindrical inner shell forming a cavity within which a spent nuclear fuel...
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7327821 |
Cask, composition for neutron shielding body, and method of manufacturing the neutron shielding body
A cask includes a trunk body that includes a basket having a square pipe or a plate member forming a cell that contains a spent fuel assembly, and a neutron shield that is formed by filling a...
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7286626 |
Neutron absorbing coating for nuclear criticality control
A neutron absorbing coating for use on a substrate, and which provides nuclear criticality control is described and which includes a nickel, chromium, molybdenum, and gadolinium alloy having less...
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7272204 |
Method and apparatus for clamping a riser brace assembly in nuclear reactor
An apparatus and method are provided which are designed to structurally replace welds that attach a riser brace assembly to a jet pump riser pipe. The riser brace assembly may include an upper...
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7215728 |
Spent fuel housing square pipe, basket and spent fuel housing container
Corner of each square pipe is molded into a terrace shape having steps. When a basket is constructed by these square pipes, steps of adjoining square pipes are assembled together face to face. Fuel...
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7194060 |
Cask and method of manufacturing the cask
Heat conductive fins ( 107 ) are welded along both sides of a belt-like member ( 105 a ) with a margin left along edges of the both sides, thereby to form a unit ( 105 c ). The unit ( 105 c ) is...
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7177384 |
Aluminum composite material, manufacturing method therefor, and basket and cask using the same
A basket has a lattice-like section for accommodating individual used nuclear fuel in predetermined positions in a cask. The basket is made from aluminum composite material having good neutron...
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7139358 |
Below grade cask transfer facility
A system and method for transferring a canister of spent nuclear fuel from a transfer cask to a receiving cask. In one aspect, the system comprises a below grade opening adapted for receiving a...
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7068748 |
Underground system and apparatus for storing spent nuclear fuel
A system and method for storing spent nuclear fuel below grade that affords adequate ventilation of the spent fuel storage cavity. In one aspect, the invention is a system comprising: a body having...
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6990166 |
Closed vessel for radioactive substance, seal-welding method for closed vessel, and exhaust system used for seal-welding method
A primary lid is set in a top opening of a vessel body that contains radioactive substance, and closes the top opening. The peripheral edge portion of the primary lid is welded to the inner...
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6978530 |
Basket assembly fixture and method of use
A basket assembly fixture is useful in the construction of a basket assembly for interring spent nuclear fuel rods. The basket assembly fixture has an elongate base and a pair of lifting beams...
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6958483 |
Container device for the storage of hazardous materials and a method of making it
A container device ( 10 ) for storing hazardous material comprises a substantially cylindrical container block which has a central axial cylindrical through passage ( 13 ) and includes a group of...
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6902697 |
Method of manufacturing a radioactive-substance storage member, billet for use in extrusion of the same, and square pipe
An aluminum powder is mixed with a neutron absorber powder through cold isostatic press to form a preliminary molding. The preliminary molding is then subjected to sintering under no pressure in...
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6898258 |
Cask
In the cask, a shape within a cavity of a barrel main body is formed in a shape corresponding to an outer shape of a basket. The basket has a structure obtained by alternately piling up plate-like...
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6891914 |
Absorbing rod, an apparatus for inserting the absorbing rod, a cask, and a method of storing spent fuel assemblies
The absorbing rods have a nearly the same shape as the shape of columnar control rods for PWR used in reactivity control of core in a reactor. The absorbing rods can shield neutrons, and are...
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6891913 |
Nuclear storage overpack door actuator and alignment apparatus
The invention is a door actuator and alignment apparatus for opening and closing the 15,000-pound horizontally sliding door of a storage overpack. The door actuator includes a ball screw mounted...
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6885719 |
Method and compositions for grouting decommissioned nuclear reactor components
A method for grouting a decommissioned nuclear reactor containing residual water. A first, water-absorbent grout is used to grout the bottom portion of the reactor vessel. The water-absorbent grout...
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6873673 |
Device for storing heat generating material and a vessel for such device
A device for storing heat-generating hazardous material, particularly radio-active fuel for nuclear reactors, comprises a substantially cylindrical, reinforced concrete body ( 11 ) with a...
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6853697 |
Hermetically sealable transfer cask
An apparatus, transfer cask, system, and method for defueling a nuclear reactor and transferring spent nuclear fuel from a spent nuclear fuel to a storage cask for long terms storage. In one...
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6839395 |
Cask and production method for cask
Heat conductive fins are welded along both sides of a belt-like member with a margin left along edges of the both sides, thereby to form a unit. The unit is welded to a body with the heat...
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6825483 |
Container for nuclear fuel transportation
A transport container for nuclear fuel is provided with an outer container having internal insulation, the insulation defining an internal cavity. The cavity receives a plurality of fuel containers...
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6823034 |
Closure mechanism and method for spent nuclear fuel canisters
A canister is provided for storing, transporting, and/or disposing of spent nuclear fuel. The canister includes a canister shell, a top shield plug disposed within the canister, and a leak-tight...
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6802671 |
Installation for very long term storage of heat-generating products such as nuclear waste
A very long term storage installation for calorific products such as nuclear waste, comprises at least one closed cavity ( 10 ), in which at least one product confinement container is housed ( 14...
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6788755 |
Safe lift and process for transporting canisters of spent nuclear fuel
A system and method for moving a canister of spent nuclear fuel from a first location, which may be within a nuclear power generation facility to a second location such as a storage cask that is...
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6785355 |
Method and system for manufacturing storage container for storing nuclear fuel
A method for storing nuclear fuel in a container ( 10 ) including a concrete body and a fuel receiver embedded in the concrete body, comprises the steps of: providing formwork ( 62 ) for the...
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6771731 |
Device for storage of hazardous material
A device ( 10 ) for storage of hazardous material, especially heat-producing hazardous material, such as radioactive spent nuclear reactor fuel, comprises a substantially cylindrical reinforced...
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6748042 |
Unirradiated nuclear fuel component transport system
An unirradiated nuclear fuel assembly component transport system that includes a clamshell-type inner liner that opens along its axial dimension to load and unload the fuel component being...
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6744841 |
Method for carrying equipment out of nuclear power plant
A method of carrying equipment out of a nuclear reactor building that, in carrying equipment rendered radioactive out of a nuclear reactor building, makes it possible to shorten the operating time...
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6741669 |
Neutron absorber systems and method for absorbing neutrons
A neutron absorber system for a nuclear fuel storage rack includes a neutron absorber, which is adapted to attach to a plurality of cell walls of a cell of the nuclear fuel storage rack. The...
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6731714 |
Method for measuring tritium activity in a radioactive waste drum
The invention relates to a method of measuring the tritium activity of a drum ( 1 ) of radioactive waste containing a quantity of radioactive waste ( 2 ) and a free volume, the method consisting of...
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6727510 |
Transportation vessel for radioactive substance and method of loading closed vessel
A canister containing spent fuel assemblies is contained in a body of a transportation cask. A top opening of a vessel body of the canister is closed by a lid welded to the vessel body. A...
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6724853 |
Lifting lug for nuclear-waste container
A lifting lug for a nuclear-waste container has a tubular body having an inner end formed with a flange adapted to be bolted to the container and a transverse wall set in and tightly fitted to a...
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6718000 |
Ventilated vertical overpack
An apparatus, system, and method of storing and transferring a canister of spent nuclear fuel. In one aspect, the apparatus is a lid for a ventilated vertical overpack having a chamber for...
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6714617 |
Disposal of radiation waste in glacial ice
Encapsulating calcined radioactive waste in strong, corrosion-resistant spheres of dimensions such that heat from the radiation melts the ice at a rate which brings the spheres to the bottom of the...
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6708394 |
Basket assembly fixture
A basket assembly fixture is useful in the construction of a basket assembly for interring spent nuclear fuel rods. The basket assembly fixture has an elongate base and a pair of lifting beams...
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6696695 |
Storage container for hazardous material
A storage container for hazardous material, especially heat-generating hazardous material, comprises a central elongate, generally cylindrical concrete body having an elongate, sealable interior...
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6683931 |
Unirradiated nuclear fuel transport system
An unirradiated nuclear fuel assembly transport canister that includes a clamshell type fuel assembly inner liner that has interior dimensions that closely conform to the outer envelope of the fuel...
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6680994 |
Monitoring the contents of a container by ultrasonic means
The contents of a container 1 are non-intrusively monitored by probing the container with an ultrasonic signal, and measuring changes in the ultrasound signature of the received signal after the...
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6674827 |
Segmented lattice rack to store fuels coming from nuclear reactors
A segmented lattice rack to store fuels coming from nuclear reactors, whose walls are made of plates joined orthogonally forming a mesh defining multiple cell cavities which are longitudinally...
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6665365 |
Storage container for radioactive materials
The basket comprises a bundle of tubes ( 10 ) connected to each other by an assembly structure ( 14 ) so as to form a regular network of compartments ( 16 ). Cross pieces ( 12 ) are placed between...
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6660972 |
Container for storing hazardous material and a method of enclosing hazardous material in a concrete container body
A container for storing hazardous material and a method of enclosing hazardous material in a concrete container body defining a storage space and having an access opening for introducing the...
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6639236 |
Radioactive material container
A shielded rack loader makes use of a loading rack movable between a shielding structure and a storage tube. A shield plug seals the storage tube. A hoist moves the shield plug and the loading...
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6625247 |
Cask and production method of cask, and embedded form
A lightweight cask comprises a barrel body which shields gamma rays. A resin which shields neutrons is provided on the periphery of the barrel body. A basket is made of a plurality of square pipes...
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