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7812209 |
Method for solidifying and stabilizing a concentrated aqueous sodium hydroxide solution
The present invention relates to a process for the solidification and stabilization of concentrated aqueous sodium hydroxide solution, characterized in that the following steps are carried out: a)...
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7804077 |
Passive actinide self-burner
The invention relates to the confinement of an alloy formed of actinide transuranic radioactive wastes and beryllium metal within a neutron moderating and reflecting apparatus to cause accelerated...
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7666370 |
Sodium salt recycling process for use in wet reprocessing process of spent nuclear fuel
The present disclosure relates to a process for recycling a sodium salt by decomposition of a sodium nitride liquid waste, comprising a neutralization step in which a nitric acid liquid waste or an...
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7518028 |
Radiation shields and techniques for radiation shielding
Radiation shields and techniques for radiation shielding are provided. Bitumen substances, such as asphalt or tar, are mixed with radioactive waste, leaded glass, or a radioactive waste and leaded...
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7387674 |
Method for solidifying soil and industrial waste, and solidified materials prepared thereby
Disclosed herein are a method for solidifying soil and industrial waste and a solidified material prepared thereby. The solidified material of soil and industrial waste is prepared by adding 2-6...
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7323613 |
Method and installation for the treatment of radioactive wastes
The invention relates to a method and system for the treatment of radioactive wastes produced as a consequence of the operation of nuclear power plants with pressurized water reactors and boron...
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7294375 |
Cement composite, concrete, concrete cask and method of manufacturing concrete
The invention provides a composite from which concrete featuring a sufficiently high heat resistance can be produced, as well as a high-safety sealed concrete cask having no opening (shielding...
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7250119 |
Composite materials and techniques for neutron and gamma radiation shielding
This invention deals with multi-component composite materials and techniques for improved shielding of neutron and gamma radiation emitting from transuranic, high-level and low-level radioactive...
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7022292 |
Radioactive waste treatment facility
An injection and solidification operation as well as a kneading and solidification operation can be performed by a single facility. A decreased amount of radioactive secondary waste is generated. A...
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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 cylindrical...
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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 concrete...
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6784444 |
Containment and transportation of decommissioned nuclear reactor pressure vessels
Apparatus for containing, transporting, and storing or disposing of radioactive machinery, including decommissioned nuclear reactor pressure vessels. An improved, economically-produced container...
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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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6512157 |
Subgrade radioactive and hazardous waste monolith packaging structural containment system
An economical and efficient method for forming a waste containing monolith which meets applicable waste disposal laws, rules and regulations. Removable walls are attached to at least one side of...
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6414211 |
Method of packing a nuclear reactor vessel for decommissioning and removal
A method of packaging a nuclear reactor vessel for decommissioning and removal, wherein closure plates are installed onto the vessel, concrete is injected into the vessel, shielding material is...
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6399849 |
Treatment of mercury containing waste
A process is provided for the treatment of mercury containing waste in a single reaction vessel which includes a) stabilizing the waste with sulfur polymer cement under an inert atmosphere to form...
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6399848 |
Encapsulation of hazardous waste materials
A method of encapsulating hazardous waste materials including heavy metals such as arsenic, mercury, nickel and chromium residues, as well as radioactive materials. The method involves adding the...
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6153809 |
Polymer coating for immobilizing soluble ions in a phosphate ceramic product
A polymer coating is applied to the surface of a phosphate ceramic composite to effectively immobilize soluble salt anions encapsulated within the phosphate ceramic composite. The polymer coating...
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6087546 |
Decommissioned reactor vessel package and method of making same
The container has inward lugs with vertical holes. The vessel is bolted to it using the closure-head-securing bolt holes. The method involves raising the reactor vessel inside a cylindrical shell...
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6075176 |
Iron-phosphate ceramics for solidification of mixed low-level waste
A method of immobilizing mixed low-level waste is provided which uses low cost materials and has a relatively long hardening period. The method includes: forming a mixture of iron oxide powders...
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6046374 |
Cellular grout radiation barrier
A method for forming a radiation-absorbing barrier around a radioactive component by flowing a radiation-absorbing cement grout into a container which encloses the component. The...
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6008428 |
Method and device for storing hazardous waste
A device for the storage of hazardous waste, particularly radioactive waste, comprises a storage unit (10) comprised of an essentially cylindrical concrete body (11) having a central cavity for...
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6002063 |
Apparatus and method for subterranean injection of slurried wastes
Injection of slurried wastes is carried out within deeply buried strata. Appropriate target strata are identified in terms of sufficient porosity and permeability, and overburden that includes...
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5998690 |
Method and agents for solidification of boric acid and/or borates solutions
A unique method for solidification of solutions containing boric acid and/or borates is disclosed in this invention. The boron species in the solutions are polymerized to form polyborates, and the...
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5595561 |
Low-temperature method for containing thermally degradable hazardous wastes
A low-temperature method for producing coated hazardous waste pellets which re used as the aggregate in a concrete wasteform is characterized by combining hazardous waste with a chemically setting...
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5541968 |
Coring machine and arrangement for sampling nuclear-contaminated and other hazardous waste
The core samples of solidified hazardous waste, such as nuclear waste, are extracted from waste material in a drum by inserting rotating tubular core drills into the waste material and then...
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5539140 |
Method for obtaining a geopolymeric binder allowing to stabilize, solidify and consolidate toxic or waste materials
The method of the invention provides a geopolymeric binder in powder, used for the ultra rapid treatment of materials, soils or mining tailings, containing toxic wastes. Said geopolymeric binder...
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5498828 |
Solidification agents for radioactive waste and a method for processing radioactive waste
An object of the present invention is to improve retainability (distribution coefficient) for C-14 of a radioactive waste solidified body. The waste is solidified with a solidification agent...
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5481061 |
Method for solidifying radioactive waste
The present invention relates to a method of solidifying radioactive waste with cement, comprising forming a mixture comprising water, a hydrophilic material and cement substantially non-shrinkable...
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5457263 |
Method for containing radioactive waste
A method of producing a concrete container for storage of radioactive waste includes the steps of providing a double-walled mold with an inner and an outer wall, the mold being open at the top and...
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5457262 |
Preparation of inorganic hardenable slurry and method for solidifying wastes with the same
The present invention discloses a method for preparing the inorganic hardenable slurry and the use of same in the solidification of wastes. In addition to water, the essential parts of the slurry...
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5457266 |
Process for treating radioactive waste
A process for treating radioactive waste in the form of contaminated powdery ionic exchange resin to make it suitable for final storage by reducing its volume as much as possible, includes...
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5434333 |
Method for treating materials for solidification
A method for treating materials such as wastes for solidification to form a solid, substantially nonleachable product. Addition of reactive silica rather than ordinary silica to the material when...
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5414197 |
Method of containing and isolating toxic or hazardous wastes
A method of containing hazardous and toxic wastes includes the steps of irporating the dried waste, in a salt form, in melted polymer, such as asphalt, and forming the waste salt and asphalt blend...
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5414196 |
Method of decontaminating a cementitious surface
A cementitious surface contaminated with a radioactive substance is decontaminated by applying a micro-organism to the surface to degrade the surface. The residue which contains the radioactive...
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5402455 |
Waste containment composite
The present invention provides an improved multilayered storage structure composite material. The composite contains a fibrous mat made from interwoven fibers, preferably metallic fibers, that is...
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RE34613 |
Process for decontaminating radioactively contaminated metal or cement-containing materials
Contaminated surface layers are decontaminated by treatment with an aqueous fluorine base-containing decontamination solution. The aqueous decontamination solution contains 0.05 to 50 Mol of...
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5308696 |
Carbon fiber-reinforced cement material and method for preparing same
A method for preparing a carbon fiber-reinforced cement material is here disclosed which comprises the step of using, as a reinforcing material, a carbon fiber from which a gas has been removed by...
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5269975 |
Solidification of organic waste materials in cement
A process for solidifying organic waste in cement for transport and storage in solid form by mixing organic waste, water, and a cationic amine to form an emulsion, mixing the emulsion with cement...
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5256338 |
Solidifying materials for radioactive waste disposal, structures made of said materials for radioactive waste disposal and process for solidifying of radioactive wastes
According to the present invention, a fibrous material having a property to adsorb radioactive nuclides in the form of ion or molecule onto its surface is added to a cement type hydraulic...
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5143653 |
Process for immobilizing radioactive ion exchange resins by a hydraulic binder
The invention relates to a process for immobilizing, by an hydraulic binder, radioactive ion exchange resins or IER, which can contain borates in a quantity which can reach up to the equivalent of...
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5114622 |
Method of cementing radioactive waste and cemented body
The present invention relates to a method of cementing a radioactive waste and a cemented body thereof which are less liable to bring about radioactivity leakage for a long period of time and...
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5100586 |
Cementitious hazardous waste containers and their method of manufacture
Novel cementitious containers for storage of hazardous waste are disclosed having an inner layer of substantially unhydrated cement in contact with the hazardous waste and an outer layer of...
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5045241 |
Method for solidifying radioactive wastes
A method of solidifying radioactive wastes comprising the steps of substituting the atmosphere inside a container packed with radioactive waste with a condensable vapor, pouring a matrix material...
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5043103 |
Method and apparatus for centrifugally casting hazardous waste
A casting containing toxic waste is made by centrifugally casting toxic waste in a pre-formed cage having heat conducting means therein. The casting is formed with suitable shielding materials...
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4933113 |
Process for the processing of contaminated boric acid
Contaminated surface layers are decontaminated by treatment with an aqueous fluorine base-containing decontamination solution. The aqueous decontamination solution contains 0.05 to 50 Mol of...
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4931222 |
Process for treating radioactive liquid waste containing sodium borate and solidified radioactive waste
The present invention provides drying and pulverization of a radioactive liquid waste containing sodium borate as a main component by heating, where the liquid waste is heated, dried and pulverized...
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4904416 |
Cement solidification treatment of spent ion exchange resins
Disclosed is an improved process for cement solidification treatment for disposition of spent ion exchange resins exhausted from nuclear power plants.The wet resin particles are centrifuged to...
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4892685 |
Process for the immobilization of ion exchange resins originating from radioactive product reprocessing plants
The present invention relates to a process for the immobilization of ion exchange resins originating from radioactive produce (waste) reprocessing plants, the said resins being immobilized in a...
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