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| Number | Title | Issue Date |
| 7255895 | Method for controlling solute loading of polymer microparticles Solute-loaded polymer microparticles are obtained by immersing microparticles in a bath comprising a selected solute dissolved in a ternary solvent system. A first solvent of the ternary system is a strong solvent for both the solute and the polymer from which the m... | 08/14/2007 |
| 7172990 | Highly active spherical metal support catalysts The invention relates to highly active spherical metal support catalysts with a metal content of 10 to 70% by mass, and a process for their production with the use of a mixture of polysaccharides and at least one metal compound which is dropped into a metal salt sol... | 02/06/2007 |
| 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 |
| 6964747 | Production of dyed polymer microparticles A dye, such as a fluorescent dye, is incorporated into polymer microparticles using a solvent system composed of a first solvent in which the dye and the microparticle polymer are soluble, a second solvent in which the dye and the microparticle polymer are not or on... | 11/15/2005 |
| 6960311 | Radiation shielding materials and containers incorporating same An improved radiation shielding material and storage systems for radioactive materials incorporating the same. The PYRolytic Uranium Compound (“PYRUC”) shielding material is preferably formed by heat and/or pressure treatment of a precursor material comprising m... | 11/01/2005 |
| 5596615 | Fuel assembly for nuclear reactor and manufacturing method thereof A fuel assembly avoiding the generation of irradiation damage, a Zr alloy used for the same, and a manufacturing method thereof. According to one embodiment, a super-saturated solid-solution Zr alloy powder having a crystal grain size in the range of 1000... | 01/21/1997 |
| 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 withdrawing the core drills with core samples of the waste materi... | 07/30/1996 |
| 5422047 | Carbonaceous fuel particles Provided is a method for making high-temperature high-performance fuel particles wherein fertile or fissile metal carbides are dispersed in spherical graphite skeletons. That is, a fissile metal salt, such as uranyl nitrate, is added to an aqua-mesophase ... | 06/06/1995 |
| 5382388 | Process for the preparation of rhenium-188 and technetium-99m generators Process for preparing a radionuclide generator for producing Tc-99m or Re-188. A clear solution containing a metallic cation and an anion comprising W-188 or Mo-99 is provided. The metallic cation is present in the solution as a dissolved complex of the m... | 01/17/1995 |
| 5075044 | Process for the radioactive decontamination of an oil According to the invention, the oil is passed through a pulverulent material, such as an earth or clay, in the presence of an acid. The pulverulent material can be placed beforehand on a filter or can be mixed with the oil before filtration. If necessary,... | 12/24/1991 |
| 5061475 | Composition and method of treatment of arthritis and related diseases with holmium-166 radionuclides An aggregate suspension containing holmium-166 hydroxide and a carrier (such as a particulate ferric hydroxide) is injected into a patient's anesthetized joint (such as a knee joint or hip joint) for the treatment of inflamed synovial tissues such as pres... | 10/29/1991 |
| 5061476 | Radiolabeled colloid compositions and method for preparing same Radiolabeled colloid compositions and a method for the preparation of radionuclide-colloid compositions useful in the treatment of rheumatoid arthritis are disclosed. A radionuclide selected from the group consisting of Sm-135, Ho-166, In-155m, Y-90, Gd-1... | 10/29/1991 |
| 4970062 | Colloid labelled with radionuclide and method A ferric hydroxide colloid having an alpha-emitting radionuclide essentially on the outer surfaces and a method of forming same. The method includes oxidizing a ferrous hydroxide to ferric hydroxide in the presence of a preselected radionuclide to form a ... | 11/13/1990 |
| 4925597 | Method for the decontamination of radioactively contaminated liquids In a process for decontaminating radioactively polluted lubricant oil, (a) the lubricant oil to be decontaminated is mechanically filtered, (b) an acid solution of the salts of the elements, the radionuclides of which are to be removed, is added, and (c) ... | 05/15/1990 |
| 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 a hydrosol of the matrix, which is formed through the reac... | 08/22/1989 |
| 4804498 | Process for treating radioactive waste liquid A soluble salt (sodium sulfate or sodium borate (Na2 SO4 or Na2 B4 O7) contained as the main component in a concentrated radioactive waste liquid generated in the BWR power plant or the PWR power plan... | 02/14/1989 |
| 4778627 | Disposable hazardous and radioactive liquid hydrocarbon waste composition and method An improved method of disposing of radioactive or hazardous liquid hydrocarbon compositions comprises placing the liquid hydrocarbons in a container and adding an organic ammonium montmorillonite in ratios of between about 1:2 and 3:1, by volume, respecti... | 10/18/1988 |
| 4715992 | Filter element reduction method Disclosed is a method of reducing the volume of a material containing addition polymerizable bonds by contacting the material with sufficient butyrolactone to dissolve the soluble organic material therein and form a slurry. About 0.1 to about 2% by weight... | 12/29/1987 |
| 4681705 | Decontamination of radioactively contaminated liquids A method of decontaminating mixtures of radioactively contaminated water and radioactively contaminated water-immiscible organic liquids to produce a decontaminated organic liquid which can be disposed of in a conventional manner. The method comprises sep... | 07/21/1987 |
| 4663093 | Preparation of nuclear fuel spheres by flotation-internal gelation A simplified internal gelation process for the preparation of gel spheres of nuclear fuels. The process utilizes perchloroethylene as a gelation medium. Gelation is accomplished by directing droplets of a nuclear fuel broth into a moving volume of hot per... | 05/05/1987 |
| 4620947 | Solidification of aqueous radioactive waste using insoluble compounds of magnesium oxide Firm gel structures are formed from hot aqueous radioactive waste solutions containing boric acid by adding powdered magnesium oxide or magnesium hydroxide followed by addition of calcium oxide or calcium hydroxide. Cement may be introduced after addition... | 11/04/1986 |
| 4615834 | Process and apparatus for producing microspheres of fissile and/or fertile materials A process and an apparatus are, herein, disclosed for producing microspheres of fissile and/or fertile materials with a high degree of sphericity from a feed solution starter containing at least one metal salt selected from among thorium, uranium and plut... | 10/07/1986 |
| 4615794 | Method of removing radioactive waste from oil A method of removing radioactive waste from oil in which all particulates, radioactive contaminants, and moisture are removed from the oil. Particulate matter is removed from the oil by a combination of filtering and heating. Radioactive contaminants are ... | 10/07/1986 |
| 4581164 | Gel drying via treatment with organic liquid below gas stream The present invention relates to the treatment of gel materials to remove water therefrom. The invention provides a process for removing water from a gel material by contacting the gel material with an organic liquid and contacting the organic liquid with... | 04/08/1986 |
| 4502987 | Method of controlling crystallite size in nuclear-reactor fuels Improved spherules for making enhanced forms of nuclear-reactor fuels are prepared by internal gelation procedures within a sol-gel operation and are accomplished by first boiling the concentrated HMTA-urea feed solution before engaging in the spherule-fo... | 03/05/1985 |
| 4481134 | Method for forming microspheres for encapsulation of nuclear waste Microspheres for nuclear waste storage are formed by gelling droplets containing the waste in a gelation fluid, transferring the gelled droplets to a furnace without the washing step previously used, and heating the unwashed gelled droplets in the furnace... | 11/06/1984 |
| 4472512 | Treatment of materials The present invention relates to the treatment of gel materials to remove water therefrom. The invention provides a process for removing water from a gel material by contacting the gel material with a gaseous mixture of an organic compound and a gas. The ... | 09/18/1984 |
| 4459245 | Method and apparatus for controlled size distribution of gel microspheres formed from aqueous dispersions The present invention is directed to a method and apparatus for making a population of dense, closely size-controlled microspheres by sol-gel procedures wherein said microspheres are characterized by a significant percentage of said population being withi... | 07/10/1984 |
| 4431164 | Process and apparatus for producing microspheres Heat gelable droplets of a suitable liquid feed material are dielectrically heated to the gelling temperature by exposure to microwave radiation during free fall through a heating zone. The gelled microspheres thus produced are caught and collected in a w... | 02/14/1984 |
| 4415536 | Apparatus for contacting particulate material with processing liquid Apparatus for contacting particles with a fluid includes two tubes having different diameters and each including a straight lower section inclined relative to the horizontal and a straight, vertical upper section, the lower ends of the tubes being joined ... | 11/15/1983 |
| 4397778 | Coprocessed nuclear fuels containing (U, Pu) values as oxides, carbides or carbonitrides Method for direct coprocessing of nuclear fuels derived from a product stream of a fuels reprocessing facility containing uranium, plutonium, and fission product values comprising nitrate stabilization of said stream vacuum concentration to remove water a... | 08/09/1983 |
| 4384990 | Uranyl nitrate pouring solution for producing nuclear fuel particles and a method for its preparation Sorbitol, or another polyalcohol such as erythritol, dulcitol or xylitol, is added to a solution containing uranyl nitrate which may also contain another heavy metal, such as throium or plutonium, prior to preneutralization with ammonia in order to provid... | 05/24/1983 |
| 4382885 | Method for producing nuclear fuel Nuclear fuel is made by contacting an aqueous solution containing an actinide salt with an aqueous solution containing ammonium hydroxide, ammonium oxalate, or oxalic acid in an amount that will react with a fraction of the actinide salt to form a precipi... | 05/10/1983 |
| 4382026 | Process for encapsulating radioactive organic liquids in a resin Radioactive organic liquids are converted to a form suitable for burial by the process wherein the liquid is contacted with insoluble, swellable polymer particles to form swollen gelled particles which are dispersed in an unsaturated polyester, vinyl este... | 05/03/1983 |
| 4293507 | Preparation of shaped bodies There is disclosed a method for the preparation of a shaped body which includes the step of cold pressing a material to give the shaped body, wherein the material has been prepared by means of a gelation process and not substantially comminuted prior to c... | 10/06/1981 |
| 4284593 | Preparation of shaped bodies There is disclosed a method for the preparation of a shaped body which includes pressing a powder to give a "green" shaped body wherein the powder has been made by comminuting a material prepared by means of a gelation process, the material prior to commi... | 08/18/1981 |
| 4271037 | Device for the production of sol-gel globules in coarse and fine fractions A device for the production of sol-gel globules for sphere-pac nuclear fuel includes a vertical gelling column opening into an elongated vat through its bottom wall, the vat receiving a horizontal gelling stream issuing from a ribbon nozzle. The bottom wa... | 06/02/1981 |
| 4271127 | Apparatus for the continuous precipitation of uranium peroxide A process and apparatus for the production of pourable, directly compactable uranium dioxide powder by continuous precipitation of uranium peroxide from a stirred uranyl nitrate solution at a pH of 1-2.5 with hydrogen peroxide, calcining of the peroxide a... | 06/02/1981 |
| 4231976 | Process for the production of ceramic plutonium-uranium nuclear fuel in the form of sintered pellets Ceramic plutonium-uranium fuels are made by sintering wet-chemical microspheres of plutonium-uranium solid-solution oxides, carbides, nitrides, or the like, or by sintering separate plutonium- and uranium-compound microspheres mixed together, the uranium ... | 11/04/1980 |
| 4224258 | Method and apparatus for producing spherical particles of uniform size of nuclear fuels or breeder materials A vibrating nozzle produces a stream of drops of a nitrate solution that attain spherical drop shape before entering an ammonia gas phase where gas supply nozzles direct streams of ammonia gas obliquely against the drop stream with a component of motion i... | 09/23/1980 |
