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| Number | Title | Issue Date |
| 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 |
| 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 material enables waste ions from at least fission products in irradiate... | 07/18/2006 |
| 7034198 | Method for decomposing plastic A conventional method of pyrolytically decomposing plastic to make low-molecular compounds is poor in efficiency of use of energy due to high heating temperatures (at least 600° C. and 800° C. at maximum). The invention provides that a functional powder is ... | 04/25/2006 |
| 6625248 | Process for the treatment of radioactive graphite A process for the treatment of radioactive graphite which includes the following steps: (i) reacting the radioactive graphite at a temperature in the range of from 250° C. to 900° C. with superheated steam or gases containing water vapor to form hydroge... | 09/23/2003 |
| 6558308 | AVS melting process The Advanced Vitrification System (AVS) Melting Process is a process for vitrification of waste in a disposable canister. In the process, waste is dropped into the disposable canister from the top. While the waste is being dropped into the disposable cani... | 05/06/2003 |
| 6518477 | Simplified integrated immobilization process for the remediation of radioactive waste A method for remediating non-homogeneous radioactive waste to significantly reduce the waste mass/volume and to convert such waste to products that meet federal regulatory compliance standards is disclosed. High level waste (HLW) stored in underground tan... | 02/11/2003 |
| 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 induction-heated and the whole of the wastes can be melted qu... | 11/05/2002 |
| 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 incineration of the organic materials and to suppress the emission ... | 09/11/2001 |
| 6223560 | Process of producing a glassy product for multiple applications and products obtained by the process A process for recycling trash and obtaining a glassy vitreous product by mixing trash with a vitrifying composition comprising 30% Sodium Sulphate, 7% Quartz, 20% Calcium Carbonate, 23% Sodium Carbonate, 13% Organic Sulphate (consisting of 20% Sodium Sulp... | 05/01/2001 |
| 6120745 | Method for the oxidation of at least one alkali metal Method for the oxidation of at least one alkali metal, according to which this alkali metal is subjected in molten condition to an oxidation by a reaction with oxygen, characterized in that the molten alkali metal is dispersed in a fluidized bed (6) and i... | 09/19/2000 |
| 6084149 | Method and apparatus for decomposing hazardous substances using high frequency waves to provide environmentally safe fixation ashes in an incinerator A melting furnace that incorporates the autoclave theory and is equipped with a high-frequency (horizontal wave) device for incinerating material and for thermal decomposition and recrystallization of organic and inorganic hazardous compounds contained in... | 07/04/2000 |
| 6084147 | Pyrolytic decomposition of organic wastes An organic waste decomposition system and method is described having two reaction vessels in tandem, each using superheated steam augmented by oxygen for decomposing a wide variety of organic compounds to reduce both mass and volume. Decomposition takes p... | 07/04/2000 |
| 6069290 | Waste treatment process and reactant metal alloy A waste treatment process includes charging a reactor container (12) with a reactant alkaline metal alloy (10) and isolating the reactant alloy from oxygen gas. After heating the reactant alloy (10) in the reactor container (2) to a minimum of 770 degrees... | 05/30/2000 |
| 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 |
| 5986159 | Chemical tailoring of steam to remediate underground mixed waste contaminents A method to simultaneously remediate mixed-waste underground contamination, such as organic liquids, metals, and radionuclides involves chemical tailoring of steam for underground injection. Gases or chemicals are injected into a high pressure steam flow ... | 11/16/1999 |
| 5910621 | Treatment of titaniferous materials A process for facilitating the removal of impurities e.g. radionuclides, such as uranium and thorium, and/or one or more of their radionuclide daughters, from titaniferous material includes contacting the titaniferous material with one or more reagents at... | 06/08/1999 |
| 5909654 | Method for the volume reduction and processing of nuclear waste A method and apparatus for the volume reduction and processing of solid organic waste, in particular ion exchange media from nuclear facilities containing sulfur or chlorine. A method and apparatus for the volume reduction of nuclear waste is disclosed co... | 06/01/1999 |
| 5901169 | Apparatus for discharging molten matter from cold crucible induction melting furnace Molten matter is discharged from a cold crucible induction melting furnace provided with a furnace body disposed within a high-frequency coil for heating the furnace body. A metallic discharging nozzle extends downwardly from an inner bottom portion of th... | 05/04/1999 |
| 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 the furnace. Based on the assessment, a predetermined amou... | 03/02/1999 |
| 5835866 | Method for treating radioactive waste Ion exchange resins contaminated with a radioactive component are treated by exposing the contaminated ion exchange resins to a bound radio frequency electric field for uniformly heating them to drive off water. The dried ion exchange resins are then unif... | 11/10/1998 |
| 5774815 | Dry halide method for separating the components of spent nuclear fuels The invention is a nonaqueous, single method for processing multiple spent nuclear fuel types by separating the fission- and transuranic products from the nonradioactive and fissile uranium product. The invention has four major operations: exposing the sp... | 06/30/1998 |
| 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 |
| 5678241 | Process for concentrating thorium containing magnesium slag The present invention describes a process to reduce the volume and/or weight of magnesium slag when the magnesium slag contains radioactive thorium. The process contacts the magnesium slag as an aqueous slurry with an acid in a pH range from about 4.0 to ... | 10/14/1997 |
| 5649894 | Compositions and methods for waste treatment Methods for waste treatment and compositions of stabilized waste elements are provided, typically for the disposal of arsenical wastes. Arsenic trioxide waste produced as a by-product of metal extraction is slurried in water for from 6 to 24 hours with fi... | 07/22/1997 |
| 5648592 | Method and apparatus for treating waste and for obtaining usable by-product The present invention is directed to the art of treating waste using laser technology. Industrial and toxic waste materials are irradiated with a laser inside a reactor chamber such that they are heated to high temperatures. Organic compounds are thermall... | 07/15/1997 |
| 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, soda, etc.) and injected directly into the plume of a non-tra... | 06/10/1997 |
| 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 roasting the composition so that the component forms a crysta... | 03/18/1997 |
| 5550311 | Method and apparatus for thermal decomposition and separation of components within an aqueous stream An apparatus and method for treating materials that present disposal problems is provided. The treatment takes place within an aqueous stream and in an oxygen-deficient multiple zone system, and results in the thermal decomposition and/or separation of co... | 08/27/1996 |
| 5536896 | Waste processing A method for the processing of solid organic sulfur-containing waste, in particular ion exchange media, from nuclear facilities, which method comprises that in a first step a) the waste is subjected to pyrolysis at the most at 700° C. in a step b) the ga... | 07/16/1996 |
| 5489737 | Radioactive waste processing system A processing system for radioactive waste is composed of an adjusting tank having a sampling port, a solidification processing system, and a package inspection apparatus, and a package, of which inventory per a package has been exactly grasped, is prepare... | 02/06/1996 |
| 5476989 | Adsorbent of radioactive nuclides and process for volume-reduction treatment of radioactive waste An adsorbent useful for the adsorption of radioactive nuclides which comprises fibrous active carbon having a specific surface area of 1,000 m2 /g or more and an equilibrium moisture regain of 10% or more at a relative humidity of 45%; and a pr... | 12/19/1995 |
| 5457264 | Method of melting treatment of radioactive miscellaneous solid wastes A method of melting treatment of radioactive miscellaneous solid wastes containing therein an electrically conductive substance and other waste components. This method comprises charging the radioactive miscellaneous solid wastes into a cold crucible indu... | 10/10/1995 |
| 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 mechanically dewatering the ion exchange resin. The dewatered ion ... | 10/10/1995 |
| 5449505 | Method for disposing of radioactive graphite and silicon carbide in graphite fuel elements Method for destroying radioactive graphite and silicon carbide in fuel elements containing small spheres of uranium oxide coated with silicon carbide in a graphite matrix, by treating the graphite fuel elements in a molten salt bath in the presence of air... | 09/12/1995 |
| 5397481 | Submergible torch for treating waste solutions and method thereof A submergible torch for removing nitrate and/or nitrite ions from a waste solution containing nitrate and/or nitrite ions comprises: a torch tip, a fuel delivery mechanism, a fuel flow control mechanism, a catalyst, and a combustion chamber. The submergib... | 03/14/1995 |
| 5353718 | Remediation of low level radioactive mixed waste in a fluidized bed incinerator Mixed waste containing organic constituents and low level radioactive waste is remediated in a circulating fluidized bed combustor. Three separators are used to filter the flue gas and separate fine radioactive material from coarse non-radioactive materia... | 10/11/1994 |
| 5324485 | Microwave applicator for in-drum processing of radioactive waste slurry A microwave applicator for processing of radioactive waste slurry uses a waveguide network which splits an input microwave of TE10 rectangular mode to TE01 circular mode. A cylindrical body has four openings, each receiving 1/4 of th... | 06/28/1994 |
| 5288434 | Hepa filter dissolution process A process for dissolution of spent high efficiency particulate air (HEPA) filters and then combining the complexed filter solution with other radioactive wastes prior to calcining the mixed and blended waste feed. The process is an alternate to a prior me... | 02/22/1994 |
| 5185104 | Method of treatment of high-level radioactive waste A method of treatment of a high-level radioactive waste comprising heating the radioactive waste at a high temperature of about 500° to 3000° C. to vaporize part of the elements contained in the radioactive waste, and cooling the resultant vapor to sepa... | 02/09/1993 |
| 4935167 | Method and apparatus for treating radioactive waste A process and apparatus whereby radioactive waste can be treated such as produced from within a nuclear power plant comprising the steps whereby waste is admitted to a dual 90 degree conveyor system, the latter of which transfers waste to an incinerator, ... | 06/19/1990 |
