|
Match
|
Document |
Document Title |
|
|
7542539 |
Apparatus and method for ultrasonically cleaning irradiated nuclear fuel assemblies
An apparatus for cleaning an irradiated nuclear fuel assembly includes a housing adapted to engage a nuclear fuel assembly. A set of ultrasonic transducers is positioned on the housing to supply...
|
|
|
7149272 |
Filter for cooling water in a light water cooled nuclear reactor
The invention refers to a filter ( 1 ) for separating particle from cooling water in a nuclear plant, and a fuel assembly with such a filter. The filter has an inlet end ( 2 ) and an outlet end ( 3...
|
|
|
6960326 |
Method of separating uranium from irradiated nuclear fuel
The invention provides a method of separating uranium from at least fission products in irradiated nuclear fuel, said method comprising reacting said irradiated nuclear fuel with a solution of...
|
|
|
6716402 |
Dissolution and decontamination process
The present invention concerns a process for dissolving ruthenium deposits that are present on a surface and a process for decontaminating the internal circuits of nuclear fuel reprocessing plants...
|
|
|
6702902 |
Method and device for radioactive decontamination of a steel wall
Disclosed a method for radioactive decontamination of a steel surface, which is performed by bringing the surface to be decontaminated into contact with a pickling solution comprising a first iron...
|
|
|
6652661 |
Radioactive decontamination and translocation method
A method for removing a wide variety of radioactive contaminants from a contaminated surface sufficient for the surface to be classified as a low-level waste or as free release. Contaminated...
|
|
|
6549603 |
Method of chemical decontamination
To suppress a decrease of thickness due to corrosion of structural members and to achieve a removal of radionuclides with good efficiency in a nuclear power plant, oxidation decontamination is...
|
|
|
6549601 |
Mounting method for core internals
An old core shroud ( 11 ) and an old jet pump ( 16 ) received in a reactor pressure vessel ( 1 ) are cut and carried out. A module of core internals having a new core shroud (N 11 ), a new jet pump...
|
|
|
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...
|
|
|
6219399 |
Maintenance method in nuclear power plant
A maintenance of a suppression pool or spent fuel storage pool in a reactor primary containment vessel of a nuclear power plant includes a cleaning step of a water in the suppression pool and a...
|
|
|
5764716 |
Process and apparatus for generating an inerting gas
A process for generating an inerting gas for rendering an atmosphere inert, such as within a containment shell of a nuclear power plant. Inert gas is kept in liquid or solid phase in a first...
|
|
|
5633902 |
Method and apparatus for dismantling fuel storage racks
A metal cutting motor driven saw blade carried by a housing structure for anchoring inside the fuel storage cell forms part of apparatus that is used in method to reduce the volume of...
|
|
|
5473647 |
Process and device for obtaining samples from the atmosphere in a closed gastight vessel, preferably from the reactor safety vessel of a nuclear power station
A process for obtaining a sample from an atmosphere in a closed gastight vessel, preferably from a reactor safety vessel of a nuclear power station, includes passing a sample through a venturi...
|
|
|
5325410 |
Clean-up system for the chemical decontamination of a nuclear reactor primary system
A chemical decontamination clean-up system for use on-line in a nuclear reactor primary system includes a pump arrangement within the nuclear reactor primary system for pumping primary system...
|
|
|
5272738 |
Device for monitoring the atmosphere withing a nuclear reactor containment
In a device for monitoring the atmosphere within the containment shell (1) of a reactor plant, a sample removal means (41) is provided in the containment shell, from which a gas mixture is led via...
|
|
|
5257297 |
System for monitoring the radioactivity of liquid waste
A system for monitoring the radioactivity of a liquid waste stream includes a pair of tanks into which the liquid waste stream is directed during alternating fill cycles. At the conclusion of each...
|
|
|
5173250 |
Apparatus for demolishing biological shield wall of a nuclear reactor and a method of demolishing the same
The present invention presents a novel apparatus and a method of demolishing a biological shield wall of a nuclear reactor using a concrete cutter device working on a wire saw, said apparatus...
|
|
|
5089216 |
System for chemical decontamination of nuclear reactor primary systems
A unique and optimum nuclear steam supply system operating configuration for integration of a chemical decontamination system is disclosed. The chemical decontamination system is connected to, and...
|
|
|
5077000 |
Method of preparing a reactor coolant pump for vacuum degasification of a reactor coolant system
An auxiliary flexible vacuum seal for preparing a reactor coolant pump for vacuum degasification of the reactor coolant system employs a flexible boot member having a pair of...
|
|
|
5076971 |
Method for enhancing alpha decay in radioactive materials
Apparatus and method for decontaminating radioactive materials by stimulating the atomic system of radioactive materials. The stimulus is kept applied to the radioactive materials for a...
|
|
|
5028384 |
Method for enhancing personnel safety in operating a nuclear reactor plant, and means therefor
A measure providing improved personnel safety in the operation of a steam producing, water cooled, boiling water nuclear fission reactor for generating electrical power is disclosed. The measure...
|
|
|
4892684 |
Method and apparatus for separating radionuclides from non-radionuclides
In an apparatus for separating radionuclides from non-radionuclides in a mixture of nuclear waste, a vessel is provided wherein the mixture is heated to a temperature greater than the temperature...
|
|
|
4834936 |
Continuous dissolution apparatus for spent nuclear fuel
A continuous dissolution apparatus for spent nuclear fuel in which a container (2) for holding a dissolution processing solution (1) is continuously supplied with nitric acid from a feed port (3),...
|
|
|
4797249 |
Process for precluding or reducing the danger to a system and the surroundings thereof by reactive mixtures
A process for precluding or reducing the danger to a system or its surroundings by mixtures comprising reactive substances which react chemically and/or physically and the release of pollutants...
|
|
|
4698202 |
Process for installation for the controlled discharge of activity from a reactor containment structure of a gas-cooled nuclear power plant
A process for the controlled discharge from a reactor containment structure of a gas cooled nuclear power plant and the installation for achieving this process include parallel discharge circuits...
|
|
|
4647425 |
Method of vacuum degassing and refilling a reactor coolant system
A procedure for vacuum degassing of a reactor coolant system which basically utilizes existing equipment to degas and refill the coolant system. The level of radiogas and non-radiogas concentration...
|
|
|
4645641 |
Process and installation to secure a prestressed concrete pressure vessel surrounded by a reactor protection building against excessive pressure and to prevent the release of activity to the environment
A process and an installation for the securing against excessive pressure in a prestressed concrete pressure vessel of a gas cooled high temperature reactor and for the prevention of activity...
|
|
|
4631164 |
Nuclear power station with a containment
Nuclear power station, including a containment for enclosing activity-carrying components having a given height and upper and lower parts, pipelines being extended in vertical direction in the...
|
|
|
4601873 |
Method of avoiding or inhibiting intermixing of the atmosphere which exists in an enclosed space with a gaseous substance present in the same space
In a method of inhibiting or avoiding intermixing of the atmosphere which exists in a closed nuclear reactor containment space with a gaseous substance present in the same space a change in density...
|
|
|
4599513 |
Enclosure for sorting radioactive material
An enclosure for sorting materials having a low level of radioactivity contains a radiation detector and uses a blower to provide a negative atmosphere. Closures over holes in the floor of the...
|
|
|
4594774 |
Machines for dismantling decommissioned nuclear reactors
A machine for dismantling, unloading and transferring to a disposal facility, nuclear reactor structure and/or components, which have been irradiated during operation of the reactor. The machine...
|
|
|
4533514 |
Nuclear reactor degassing method and degassing system
Control rods are inserted into the core of a nuclear reactor in operation to shut down the reactor output. Before completion of entire control rod insertion, a high-temperature coolant flowing in...
|
|
|
4487740 |
Procedure and equipment for injecting gas into liquids
A method and apparatus is shown for establishing a predetermined concentration of gas in the reactor core coolant for a pressurized water nuclear power system. Gas is added to core coolant water...
|
|
|
4309583 |
Heat-treating apparatus for prolonging the life of a pressure vessel, especially a reactor pressure vessel
Heat-treating apparatus for prolonging the life of a pressure vessel formed of thermally resistant material subject to time-dependent structural changes due to neutron flux includes a heating...
|
|
|
4297324 |
Apparatus for the continuous processing of compounds in a liquid
Apparatus for processing compounds in a liquid, wherein it is constituted by a helical vibrating elevator having a tank with a vertical axis, a fixed cover, an annular helical ramp fixed to the...
|
|
|
4293382 |
Method of starting up a nuclear reactor
At the time of starting up a nuclear reactor, the concentration of oxidizing substance in a cooling water in a reactor pressure vessel is decreased by evacuating the pressure vessel or replacing...
|
|
|
4286725 |
Vessel for collecting and extinguishing combustible liquids
A vessel for collecting liquid has a plurality of juxtapositioned hollow bodies secured to one another to form an assembly. Each hollow body defines an essentially closed inner chamber separated...
|
|
|
4276060 |
Chromatographic hydrogen isotope separation
Intermetallic compounds with the CaCu 5 type of crystal structure, particularly LaNiCo 4 and CaNi 5 , exhibit high separation factors and fast equilibrium times and therefore are useful for...
|
|
|
4193338 |
Gas dispersion system
A gas dispersion system for dispersing noxious gas released into the atmosphere within a contained ground area to prevent its passing at an unacceptable concentration to a neighboring ground area...
|
|
|
4129627 |
Tornado protected cooling tower
A tornado protected cooling tower. The tower includes a plurality of enclosed cooling cells arranged about the periphery of an open cooling basin. Each of the cells includes a cool air inlet along...
|
|
|
4040973 |
Process and apparatus for the concentration and storage of liquid radioactive wastes
Liquid radioactive wastes are concentrated to form a pasty radioactive concentrate by evaporation below the boiling point of the waste by injecting a hot gaseous medium tangentially in a vortex...
|
|
|
4032614 |
Process for the disposal of alkali metals
Large quantities of alkali metals may be safely reacted for ultimate disposal by contact with a hot concentrated caustic solution. The alkali metals react with water in the caustic solution in a...
|
|
|
4024911 |
Pump shaft seal injection system
Apparatus is described for supplying injection liquid to the primary coolant pump shaft seals in a pressurized water nuclear reactor system. The injection liquid is the resultant mixture of liquid...
|
|
|
4017358 |
Boron thermal regeneration system
An ion exchanger which allows flow in both directions along a selected flow-path. A separator plate divides the exchanger tank into two chambers each of which has a flow-conduit so that flow may...
|
|
|
4016725 |
Apparatus for recapturing lost energy in a thermoelectric generating plant
In a thermoelectric generating plant utilizing heat to generate electric energy and having a recirculating water system in which the water is heated during passage through the plant and must be...
|
|
|
3993541 |
Removal of tritium from gas-cooled nuclear reactors
Tritium contained in the coolant gas in the primary circuit of a gas cooled nuclear reactor together with further tritium adsorbed on the graphite used as a moderator for the reactor is removed by...
|
|
|
3932212 |
Apparatus and method for depressurizing, degassing and affording decay of the radioactivity of weakly radioactive condensates in nuclear power plants
Apparatus for depressurizing, degassing and affording decay of weakly radioactive condensates in nuclear power plants having a turbine, and a main condenser turbine wherein exhaust steam of the...
|
|
|
3839159 |
SYSTEM FOR CONCENTRATING A MODERATING SOLUTION UTILIZED IN A PRESSURIZED WATER NUCLEAR POWER PLANT
A system for concentrating a solution of boric acid solution to a predetermined concentration and stripping the radioactive gases from the solution. The system is generally operable so that there...
|
|
|
3830694 |
CONTROL ROD DRIVE FOR NUCLEAR REACTORS
A nuclear reactor control rod drive having relatively wide annular gaps for hydraulic fluid between relatively movable parts in the device. Guide structure associated with movable control pistons...
|
|
|
3708818 |
APPARATUS FOR CLEANING TUBES AND THE LIKE
An apparatus for cleaning a tube used to accommodate reactor fuels has a housing, a feed spool rotatably mounted in the housing and a wiping band for cleaning the tube. Also provided are a take-up...
|