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7294291 |
Ceramicrete stabilization of U-and Pu-bearing materials
A method of stabilizing nuclear material is disclosed. Oxides or halides of actinides and/or transuranics (TRUs) and/or hydrocarbons and/or acids contaminated with actinides and/or TRUs are treated...
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7148394 |
Ceramic for packaging of radioactive cesium
Radioactive cesium is confined in a hollandite structure formed by a process that does not require reducing conditions.
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7078581 |
Encapsulation of waste
A ceramic waste immobilizing material for the encapsulation of high level radioactive waste (HLW), e.g. resulting from the reprocessing of irradiated nuclear fuel. The ceramic waste immobilising...
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7012168 |
Boron-based containment matrix for the storage or transmutation of long-life radioactive elements
The invention relates to a confinement matrix for the storage or incineration of at least one long-life radioactive element, comprising at least one crystalline boron compound of a rhombohedral...
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6852293 |
Process and device for waste pyrolysis and gasification
A process is disclosed for the pyrolysis and gasification of waste materials, in particular of special and/or hazardous waste materials, comprising a gasification and melting step, a step of...
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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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6498119 |
Chemically bonded phosphate ceramics of trivalent oxides of iron and manganese
A new method for combining elemental iron and other metals to form an inexpensive ceramic to stabilize arsenic, alkaline red mud wastes, swarfs, and other iron or metal-based additives, to create...
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6479021 |
Advanced vitrification system pyrographite
A device for improving waste vitrification in a disposable canister, the process for using the device, and the process for making the device. The disposable canister, also known as a module, has...
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6471922 |
Actinide removal from spent salts
A method for removing actinide contaminants (uranium and thorium) from the spent salt of a molten salt oxidation (MSO) reactor is described. Spent salt is removed from the reactor and analyzed to...
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6459010 |
Method for packaging industrial, in particular radioactive, waste in apatite ceramics
The invention involves a process for containment of industrial wastes, particularly nuclear wastes, in apatite ceramics. This process involves preparing a homogeneous mixture of powders which can...
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6440884 |
Composition and process for making building bricks and tiles
Building bricks and tiles are made by mixing 60% to 75% clay, 20% to 40% sludge and 1% to 10% sand, all percentages being by weight of the total composition. This process utilizes industrial waste...
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6342461 |
Ceramic composition made from waste materials and method for manufacturing the same
A ceramic composition made from waste materials and a method for manufacturing the same are disclosed. The ceramic composition comprises between 5 and 75 by weight part of a solid stated waste...
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6320091 |
Process for making a ceramic composition for immobilization of actinides
Disclosed is a process for making a ceramic composition for the immobilization of actinides, particularly uranium and plutonium. The ceramic is a titanate material comprising pyrochlore, brannerite...
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6297419 |
Method of waste treatment
This disclosure sets forth a method for processing metal waste incorporating substantial zirconium as exemplified by nuclear fuel rods which include enriched uranium and other nuclear products....
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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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6211424 |
Advanced vitrification system
The AVS invention provides for an apparatus and process for its practice involving the vitrification of waste materials, such as nuclear waste, inside a disposable canister. The preferred...
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6204214 |
Pumpable/injectable phosphate-bonded ceramics
A pumpable ceramic composition is provided comprising an inorganic oxide, potassium phosphate, and an oxide coating material. Also provided is a method for preparing pumpable ceramic-based waste...
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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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6137025 |
Ceramic composition for immobilization of actinides
Disclosed is a ceramic composition for the immobilization of actinides, particularly uranium and plutonium. The ceramic is a titanate material comprising pyrochlore, brannerite and rutile.
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6133498 |
Method for producing chemically bonded phosphate ceramics and for stabilizing contaminants encapsulated therein utilizing reducing agents
Known phosphate ceramic formulations are improved and the ability to produce iron-based phosphate ceramic systems is enabled by the addition of an oxidizing or reducing step during the acid-base...
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6084146 |
Immobilization of radioactive and hazardous contaminants and protection of surfaces against corrosion with ferric oxides
Processes for immobilizing solid contaminated materials, such as radioactive species, hazardous species, or combinations of both radioactive and hazardous species, comprise mixing the contaminated...
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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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5960368 |
Method for acid oxidation of radioactive, hazardous, and mixed organic waste materials
The present invention is directed to a process for reducing the volume of low level radioactive and mixed waste to enable the waste to be more economically stored in a suitable repository, and for...
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5875407 |
Method for synthesizing pollucite from chabazite and cesium chloride
A method for immobilizing waste chlorides salts containing radionuclides and hazardous nuclear material for permanent disposal, and in particular, a method for immobilizing waste chloride salts...
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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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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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5656009 |
Process for immobilizing plutonium into vitreous ceramic waste forms
Disclosed is a method for converting spent nuclear fuel and surplus plutonium into a vitreous ceramic final waste form wherein spent nuclear fuel is bound in a crystalline matrix which is in turn...
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5637127 |
Plasma vitrification of waste materials
This invention provides a process wherein hazardous or radioactive wastes in the form of liquids, slurries, or finely divided solids are mixed with finely divided glassformers (silica, alumina,...
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5622641 |
Method for in-situ reduction of PCB-like contaminants from concrete
A method for decontaminating of concrete and more specifically to methods used for in-situ thermal desorption of contaminants from concrete, such as PCBs is disclosed. The methods employed heat the...
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5591420 |
Cesium titanium silicate and method of making
The invention is the new material, a ternary compound of cesium, silica, and titania, together with a method of making the ternary compound, cesium titanium silicate pollucite. More specifically,...
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5545797 |
Method of immobilizing weapons plutonium to provide a durable, disposable waste product
A method of atomic scale fixation and immobilization of plutonium to provide a durable waste product. Plutonium is provided in the form of either PuO 2 or Pu(NO 3 ) 4 and is mixed with and SiO 2...
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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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5494863 |
Process for nuclear waste disposal
The present invention relates to a process for nuclear waste disposal. In it, a glass forming mixture including an aqueous solution of one or more metal alkoxides, alcohol, and solubilized, low...
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5425072 |
Method of heat treating a radioactive surface
In a method of treating a surface 12 of an object 10 contaminated with radionuclides 14, a laser source 16 is directed at the surface 12 to apply a local area 18 of intense heat to the surface 12....
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5405509 |
Remediation of a bulk source by electropotential ion transport using a host receptor matrix
Remediation of soil, concrete and groundwater using electropotential gradient induced migration of a target ion and immobilization and/or confinement of the target ion by a host receptor matrix...
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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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4859368 |
Process for the containment of materials in a ceramic matrix through the chemical precipitation of a hydrosol of the matrix
A process for the embedding or containment of waste materials, especially of radioactive waste materials, by embedding in a ceramic matrix through the intermediary of the chemical precipitation of...
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4726916 |
Method for embedding and storing dangerous materials, such as radioactive materials in a monolithic container
The present invention relates to a method for immobilizing and packing radioactive "ashes" in a mineral matrix, said method consisting in adjusting the coefficient of expansion of said ashes,...
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4632778 |
Procedure for ceramizing radioactive wastes
The present invention concerns a procedure for transforming radioactive wastes into ceramics. From the radioactive waste solution, the waste is bound to an inorganic ion exchanger either with batch...
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4501690 |
Process for treating radioactive salt cake
This invention is directed to a method and an apparatus to heat certain particles. These certain particles are heated to make them more desirable. In the heating of these particles, it is often...
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4460500 |
Method for final treatment of radioactive organic material
Radioactive waste, such as expended radioactive ion exchanger mass, can be transformed in a continuous process to a stable state for final storage in the following manner. The waste is mixed with...
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4430256 |
Reverse thermodynamic chemical barrier for nuclear waste over-pack or backfill
Radioactive waste is stored surrounded by an overpack or backfill containing non-radioactive ions of the same radioactive elements as in the waste form. In place of an overpack of the actinides,...
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4354954 |
Method for solidifying aqueous radioactive wastes for noncontaminating storage
Method for solidifying high and medium radioactivity and/or actinide containing aqueous waste concentrates or fine-grained solid wastes suspended in water for final noncontaminating storage. The...
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4297304 |
Method for solidifying aqueous radioactive wastes for non-contaminating storage
Method for solidifying high and medium radioactivity and/or actinide containing aqueous waste concentrates or fine-grained solid wastes suspended in water for final noncontaminating storage. The...
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4263163 |
Process for calcining a material
This invention is directed to a method and an apparatus to heat certain particles. These certain particles are heated to make them more desirable. In the heating of these particles, it is often...
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4028265 |
Process for converting sodium nitrate-containing, caustic liquid radioactive wastes to solid insoluble products
A method for converting sodium nitrate-containing, caustic, radioactive wastes to a solid, relatively insoluble, thermally stable form is provided and comprises the steps of reacting powdered...
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