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| Number | Title | Issue Date |
| 7855313 | Low-temperature solidification of radioactive and hazardous wastes Treatment of a radioactive waste stream is provided by adding sodium hydroxide (NaOH) and/or potassium hydroxide (KOH) together with a rapidly dissolving form of silica, e.g., fumed silica or fly ash. Alternatively, the fumed silica can be first dissolved in a NaOH/... | 12/21/2010 |
| 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 placed below the level (L) of the liquid reactant metal in the ... | 04/29/2008 |
| 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 reactivity regulation accompanied by the simultaneous production of envi... | 01/29/2008 |
| 7300641 | Method and device for capturing ruthenium present in a gaseous effluent The present invention relates to a method and a device for trapping ruthenium present in a gaseous effluent. The trapping method of the present invention comprises the use of an aqueous solution or slurry of an alkylene glycol polymer or an alkylene glycol copolymer... | 11/27/2007 |
| 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 contained radioactive waste wherein the waste comprises one or more inert met... | 07/10/2007 |
| 7195745 | Method of preparing a product based on phosphate of thorium and/or actinide(s) The invention relates to a process for the preparation of a product based on a phosphate of at least one element M(IV), for example of thorium and/or of actinide(IV)(s). This process comprises the following stages: a) mixing... | 03/27/2007 |
| 7166548 | Apatite glass ceramic based on siliceous oxyapatites Apatite glass ceramic which contains at least one glass phase and at least one apatite phase and is characterized in that at least one of the apatite phases is a phosphate- and fluorine-free siliceous oxyapatite phase. ... | 01/23/2007 |
| 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 waste. Each of the processes create a barrier against leaching and d... | 08/15/2006 |
| 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 least one radiation absorbing metal. Radioactive isotopes in the waste s... | 04/25/2006 |
| 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 solidifying agent paste is prepared by kneading a solidifying agent ... | 04/04/2006 |
| 7019189 | 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 compounds, and/or other compounds. The invention also provides borosil... | 03/28/2006 |
| 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 structure including the long-life radioactive element(s). The bor... | 03/14/2006 |
| 6818188 | 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 solidifying agent paste is prepared by kneading a solidifying agent ... | 11/16/2004 |
| 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 allows easier handling and packaging of machinery within plants where t... | 08/31/2004 |
| 6775955 | Method of packaging an object This invention relates to a method of strong/tight packaging an object in order to prepare it for shipping. Initially, a substrate is applied to an object to create a smooth surface adapted to receive a sprayable plastic thereon. Then, the sprayable plastic is spray... | 08/17/2004 |
| 6734334 | 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 waste. Each of the processes create a barrier against leaching and d... | 05/11/2004 |
| 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 permanent icefield in a relatively short time, with the resulting wa... | 03/30/2004 |
| 6635796 | Reduction of leachability and solubility of radionuclides and radioactive substances in contaminated soils and materials A process for chemical fixation of radionuclides and radioactive compounds present in soils, solid materials, sludges and liquids. Radionuclides and other radioactive compounds are converted to low-temperature Apatite-Group structural isomorphs (general c... | 10/21/2003 |
| 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: wherein: M represents an alkaline metal, Ln represents at least one cation selected from lanthanides, and t, x, y, z, w and u are such that: 0ࣘ... | 09/23/2003 |
| 6617484 | Containment and transportation of decommissioned nuclear reactor pressure vessels and the like Method and apparatus for containing, transporting, and storing or disposing of radioactive machinery, including decommissioned nuclear reactor pressure vessels. An improved, economically-produced container is provided which allows easier handling and pack... | 09/09/2003 |
| 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: Mt Cax Lny (PO4)6-u (SiO4)u X i... | 12/03/2002 |
| 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 outer and inner containers with thermal insulation therebetw... | 11/12/2002 |
| 6472579 | Method for solidification of radioactive and other hazardous waste Solidification of liquid radioactive waste, and other hazardous wastes, is accomplished by the method of the invention by incorporating the waste into a porous glass crystalline molded block. The porous block is first loaded with the liquid waste and then... | 10/29/2002 |
| 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 hazardous waste material to a settable composition, forming... | 06/04/2002 |
| 6291736 | Reduction of leachability and solubility of radionuclides and radioactive substances in contaminated soils and materials A process for chemical fixation of radionuclides and radioactive compounds present in soils, solid materials, sludges and liquids. Radionuclides and other radioactive compounds are converted to low-temperature Apatite-Group structural isomorphs (general c... | 09/18/2001 |
| 6231767 | Treatment of phosphatic wastes A process for treating thickened phosphatic clay suspensions, waste clay and phosphogypsum produced in the processing of phosphate ore by water beneficiation and chemical processing, the thickened phosphatic clay suspension having a solid content of from ... | 05/15/2001 |
| 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 embodiment of the process includes a canister having outer and inne... | 04/03/2001 |
| 6204430 | Hexametaphosphate as an agent for treating wastes, preparing construction materials and stabilizing soils The current invention provides methods for stabilizing wastes, preparing construction materials and stabilizing soils using compositions including hexametaphosphate, with or without other additives. More particularly, one method of the invention discloses... | 03/20/2001 |
| 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 a cold plasma, and the waste and the oxygen are fed togeth... | 05/09/2000 |
| 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 The invention relates to a method of manufacturing compounds of the Monazite type, doped or not doped with actinides, to a method of packaging radioactive waste, high in actinides and in lanthanides by incorporating this waste in a confining matrix based ... | 02/08/2000 |
| 5994609 | Methods of treating nuclear hydroxyapatite materials Methods are provided for treating liquid hazardous waste containing anionic radioactive or heavy metal materials by binding the hazardous waste to hydroxyapatite powder, drying and then cold or hot pressing the hydroxyapatite powder into a solid mass for ... | 11/30/1999 |
| 5994608 | Reduction of leachability and solubility of radionuclides and radioactive substances in contaminated soils and materials A process for chemical fixation of radionuclides and radioactive compounds present in soils, solid materials,sludges and liquids. Radionuclides and other radioactive compounds are converted to low-temperature Apatite-Group structural isomorphs (general co... | 11/30/1999 |
| 5953678 | Thorium phosphates, method for preparing same, and use thereof for storing radioactive materials The invention relates to novel thorium phosphates, their preparation process and their use for the storage of radioactive products. These novel thorium phosphates comply with the formulas Th4 P6 O23 (I) or Th4-x M | 09/14/1999 |
| 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 environmentally safe. An apatite or apatite-like material may be em... | 07/20/1999 |
| 5916123 | Fixation and stabilization of metals in contaminated soils and materials The present invention discloses a method of treating lead bearing process materials and lead toxic hazardous wastes. The invention relates to treatment methods employed to chemically convert leachable lead in lead bearing solid and liquid waste materials ... | 06/29/1999 |
| 5878355 | Method and apparatus for encapsulating particulates An improved method and device for decontamination of a contaminated process area is provided whereby a fine aerosol of an encapsulant for use in encapsulating the contaminants within the contaminated environment is generated. The aerosol is generated by a... | 03/02/1999 |
| 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 phosphosilicated apatite-based confinement matrix (3) e.g. complying wi... | 06/23/1998 |
| 5732362 | Method for treating radioactive laundry waste water The present invention relates to a method for treating radioactive laundry waste water generated from a nuclear power plant, nuclear fuel reprocessing plant, or radioactive nuclides handling facilities, and provides a method for treating the waste water s... | 03/24/1998 |
| 5730550 | Method for placement of a permeable remediation zone in situ A method for placement of remediation zones for treatment of contaminated groundwater in situ (10, 10A, 50, 60, 70, 80, 124) is described. The zones can be infiltrated or can be excavated and filled with a treatment composition to provide the remediation.... | 03/24/1998 |
| 5732367 | Reduction of leachability and solubility of radionuclides and radioactive substances in contaminated soils and materials A process for chemical fixation of radionuclides and radioactive compounds present in soils and solid materials. Radionuclides and other radioactive compounds are converted to low-temperature Apatite-Group structural isomorphs (general composition: (AB) | 03/24/1998 |
