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7560087 |
Method for stabilisation of metallic mercury using sulphur
Process for the stabilization of mercury metal by reaction of the mercury metal with sulphur in the solid state, in which the mercury and the sulphur are brought into contact, at an Hg/S molar...
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7550645 |
Process and composition for the immobilization of radioactive and hazardous wastes in borosilicate glass
The present invention provides processes to immobilize radioactive and/or hazardous waste in a borosilicate glass, the waste containing one or more of radionuclides, hazardous elements, hazardous...
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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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7365237 |
Liquid metal reactor and method for treating materials in a liquid metal reactor
A target material ( 60 ) to be treated in a liquid reactant metal is loaded into a containment area defined within a liquid reactant metal treatment vessel ( 11 ). The containment area is then...
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7329399 |
Hydrogen trapper compound, method for the production and uses thereof
A hydrogen-trapping compound is provided, along with a process for manufacturing the compound, and its uses, wherein the hydrogen-trapping compound is characterized in that it contains at least one...
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7309807 |
Method of containing radioactive contamination
A method of controlling or containing radioactive contamination by providing a neutron absorbing material to a radioactive contamination site. Preferably the neutron absorbing material is present...
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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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7241932 |
Encapsulation of radioactive waste using a sodium silicate based glass matrix
The present invention relates to an immobilizing medium for the encapsulation of radioactive waste. The waste immobilizing medium has a sodium silicate based glass matrix in which there is...
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7091393 |
Processes for immobilizing radioactive and hazardous wastes
The present invention utilizes one or more processes to immobilize a waste that contains one or more of radionuclides, hazardous elements, hazardous compounds, and/or other compounds present in the...
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7090827 |
Process for immobilizing metallic sodium in glass form
A process for immobilizing metallic sodium in glass form. The process comprises: (A) introducing in a dispersed state, into a reactor, an amount of a vitrified matrix precursor, metallic sodium and...
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7034197 |
Metal alloy and metal alloy storage product for storing radioactive materials
A liquid reactant metal alloy includes at least one chemically active metal for reacting with non-radioactive material in a mixed waste stream being treated. The reactant alloy also includes at...
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6972095 |
Magnetic molecules: a process utilizing functionalized magnetic ferritins for the selective removal of contaminants from solution by magnetic filtration
A decontamination system uses magnetic molecules having ferritin cores to selectively remove target contaminant ions from a solution. The magnetic molecules are based upon a ferritin protein...
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6812174 |
Low melting high lithia glass compositions and methods
The invention relates to methods of vitrifying waste and for lowering the melting point of glass forming systems by including lithia formers in the glass forming composition in significant amounts,...
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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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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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6676915 |
Method for conditioning soda effluents in the form of nepheline
This invention relates to a method for conditioning a waste constituted of an aqueous solution of sodium hydroxide NaOH of 3 to 10 M, possibly radioactive. The method is as follows: a) a...
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6624339 |
Method to confine plutonium in apatitic ceramics and products obtained using said process
A phosphosilicate apatite useful as a confinement matrix for radioactive waste, and having the formula: M t Ca x Ln y Hf w Pu z−w (PO 4 ) 6−u (SiO 4 ) u F 2 (I) wherein: M represents an...
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6489531 |
Confinement of caesium and/or rubidium in apatitic ceramics
The invention relates to the containment of caesium and/or rubidium, in particular 135 Cs and 137 Cs in an apatitic matrix of formula: M t Ca x Ln y (PO 4 ) 6−u (SiO 4 ) u X in which: M...
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6476285 |
Method of melting treatment of radioactive miscellaneous solid wastes
A method of melting treatment of radioactive miscellaneous solid wastes wherein, even when the wastes contain various kinds of substances in a mixed state, each of the substances is efficiently...
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6436271 |
Preparation of mineral matrices by cold crucible induction melting
The aim of the present invention is a process for preparing a mineral matrix by melting, which is implemented according to the method of direct cold crucible induction melting. The method employs a...
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6428695 |
Aquifer remediation barrier for removal of inorganic contaminants
A permeable barrier for decontaminating groundwater having two distinct components for increasing contaminant removal. Preferably, the barrier material is a mixture or distinct layers of bone-char...
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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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6355857 |
Metal alloy treatment process for radioactive waste
A waste treatment process includes containing a reactant metal alloy ( 210 ) in a reactant alloy container ( 202 ) substantially isolated from oxygen gas. The reactant metal alloy includes at least...
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6312499 |
Method for stabilization of liquid mercury
A method for stabilization of liquid mercury in which powdered copper particles are cleaned with a chemically reactive fluid suitable for removing surface oxidation from the surface. "Clean"...
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6296786 |
Treated waste, method for making the same and apparatus for making the same
A treated waste has been treated so as to prevent diffusion of a substance to be disposed, of e.g., radionuclide "I", that tends to occur when the waste is disposed of in reducing environment at an...
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6288300 |
Thermal treatment and immobilization processes for organic materials
Organic materials are mixed with metal oxide, such as hydrated metal oxides, prior to or during heat treatments in aerated or oxygenated environments to stabilize thermal decomposition or...
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6143944 |
Consolidation process for producing ceramic waste forms
A process for the consolidation and containment of solid or semisolid hazardous waste, which process comprises closing an end of a circular hollow cylinder, filling the cylinder with the hazardous...
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6060635 |
Method for treating hazardous waste
Procedure for the treatment of radioactive hazardous waste, in which procedure oxygen is treated with radio-frequency electromagnetic radiation in a manner known in itself so that the oxygen forms...
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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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6023006 |
Method of manufacturing compounds of the monazite type, doped or not doped with actinides and application to the packaging of radioactive waste high in actinides and in lanthanides
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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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5946639 |
In-situ stabilization of radioactive zirconium swarf
The method for treating ignitable cutting swarf in accordance with the present invention involves collecting cutting swarf in a casting mold underwater and injecting a binder mixture comprising...
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5926771 |
Method of immobilizing toxic or radioactive inorganic wastes and associated products
The present invention discloses a method of creating a monolithic wasteform consisting of a binder which chemically immobilizes heavy metals and radioactive materials so as to render them...
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5880060 |
Compositions to remove heavy metals and radioactive isotopes from wastewater
Treatment compositions and a method are provided for the removal of a plurality of heavy metals and radioactive isotopes from wastewater. The treatment compositions comprise an alkali; adsorbents,...
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5877394 |
Method for treating waste containing stainless steel
A centrifugal plasma arc furnace is used to vitrify contaminated soils and other waste materials. An assessment of the characteristics of the waste is performed prior to introducing the waste into...
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5846894 |
Phosphate bonded structural products from high volume wastes
A method to produce structural products from benign waste is provided comprising mixing pretreated oxide with phosphoric acid to produce an acid solution, mixing the acid solution with waste...
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5830815 |
Method of waste stabilization via chemically bonded phosphate ceramics
A method for regulating the reaction temperature of a ceramic formulation process is provided comprising supplying a solution containing a monovalent alkali metal; mixing said solution with an...
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5826203 |
Method for solidifying waste containing radioactive iodine
A method for solidifying a radioactive iodine-containing waste, in which volatilization of radioactive iodine outward can be suppressed during solidification, and a solidified waste having a high...
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5771472 |
Process for the conditioning of radioactive waste using phosphosilicated apatites as the confinement matrix
The invention relates to a process for the conditioning of radioactive waste using silicated apatites as the confinement matrix. This process consists of incorporating the waste (1) into a...
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5733088 |
Packaging and storage containers, especially for remote-handled hazardous waste, and process for filling them
The disclosure relates to packaging and storage containers suitable particularly for the packaging and storage, with optimum filling, of remote-handled hazardous waste; a process for filling the...
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5732365 |
Method of treating mixed waste in a molten bath
A method of treating a waste material, such as a radioactive waste material, by introducing the material into a high temperature reaction vessel such as an electric arc furnace. By controlling the...
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5711016 |
Process for the conditioning of radioactive iodine, particularly iodine 129, using an apatite as the confinement matrix
The invention relates to the conditioning or packaging of radioactive iodine, particularly iodine 129, using an apatite as the confinement matrix. Having the iodine, said apatite corresponds to the...
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5613243 |
Stabilization of radionuclides into wastes
The specification discloses a process for stabilizing radionuclides extracted during the upgrading of minerals. The process comprises forming a composition of a radionuclide and a component and...
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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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4943394 |
Method of storing radioactive waste without risk of hydrogen escape
In order to prevent the formation of a hydrogen atmosphere in a free gas ce usually available in the storage containers of radioactive waste, potassium permanganate is dispersed in a suitable...
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4929394 |
Process for compacting radioactive metal wastes
A process for compacting radioactive waste by precompressing the waste in each of capsules while filling the waste into the capsule to thereby compress the waste to the desired bulk/true density...
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4834917 |
Encapsulation of waste materials
Waste material such as toxic compounds, radioactive waste materials and spent nuclear fuel rods are encapsulated in a container system which is subjected to a hot pressure process to cause a...
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4808337 |
Hot pressing of bellows like canisters
A compressible bellows type metal canister is used in a hot pressing process for immobilizing high level radioactive nuclear waste material in the form of synthetic rock, the canister comprises a...
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4806279 |
Method of producing impregnated synthetic rock precursor
A vibratory processing arrangement including an apparatus comprising three main stages. Namely, a high level waste vibrating impregnator, a vibrating calciner and a vibratory powder mixer. The...
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