Class 252/639 - Carbon containing component

Subclass of Class 252 - Compositions
Definition: Compositions wherein the nonactinide element containing
No. of patents: 35
Last issue date: 12/18/2007

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Number	Title	Issue Date
7309473	Method for sulphurizing a UOpowder and method for making nuclear fuel pellets based on UOor mixed oxide (U,Pu)Ooxide with added sulphur Sulphidation method for a UO2 powder, in which said powder is sulfurated by bringing it into contact with a gaseous sulphidation agent. Method for manufacturing nuclear fuel pellets based on uranium oxide, or mixed oxide of uranium and plutonium, f...	12/18/2007
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
5419886	Method for generation of finely divided reactive plutonium oxide powder A method of preparing active, sinterable, finely-divided plutonium oxide (PuO2) powder from plutonium metal is disclosed. The process yields plutonium fissile material which can be easily blended to form a uniformly homogeneous powder for the f...	05/30/1995
5417943	Method for producing UO2 or (U/PU)02 powder A method for producing UO2 or (U/Pu)O2 powder includes obtaining ammonium uranyl carbonate or ammonium uranyl plutonyl carbonate by treating a starting oxide selected from the group consisting of uranium oxide, plutonium oxide and ur...	05/23/1995
4816187	Binder system for the manufacture of nuclear pellets, and the method and product thereof A fugitive binder composition for compression molding uranium dioxide nuclear fuel comprising the reaction product of a strongly alkali water solution of a diamine and oxalate ions with uranium oxide which is free of carbonates and carbamates, and having ...	03/28/1989
4696769	Method and binder for the manufacture of nuclear fuel pellets, and the product A method and binder composition for prolonging the induced plasticity of a particulate ceramic material admixture comprising uranium dioxide and a fugitive binder, and product thereof, for subsequent compaction by compression molding in the manufacture of...	09/29/1987
4687600	Process for the separation of coated nuclear fuel particles from a graphitic matrix and installation for implementing the process A treating process for the separation of coated nuclear fuel particles from a graphitic matrix in which the nuclear fuel particles are embedded, which is employed in an installation for the conditioning of graphitic fuel elements of high-temperature nucle...	08/18/1987
4670198	Binder system for the manufacture of nuclear fuel pellets, and the method and product thereof A reproducible method and stable binder composition for preserving the induced plasticity of a particulate ceramic material admixture comprising uranium dioxide and a fugitive binder, and product thereof, for subsequent compaction by compressing molding i...	06/02/1987
4668444	Process for the production of isotrophic spherical fuel or absorber elements for high temperature reactors Substantially isotropic spherical fuel and absorber elements for high temperature reactors are produced by molding corresponding fuel particles and graphite molding compositions. There is used as graphite molding powder a mixture of graphitized granules o...	05/26/1987
4666639	Process for the production of spherical fuel elements To produce spherical fuel or absorber elements for high temperature reactors a mixture of coated nuclear fuel or absorber particles and graphite molding composition is molded into spheres, carbonized in a furnace having gas flushing and calcined in a vacu...	05/19/1987
4578229	Method for the manufacture of oxidic sintered nuclear fuel bodies Method for the manufacture of oxidic nuclear fuel bodies by a heat treatment of blanks obtained from UO2 starting power or a mixture of UO2 and PuO2 starting powder at a treatment temperature in the range of 1000° C. to 1...	03/25/1986
4575436	Production of nuclear fuel products An improved method for compression molding of typically brittle ceramic materials comprising uranium dioxide which enhances their compacting and cohering properties in the manufacture of nuclear fuel products. The uranium dioxide is mixed with a fugitive ...	03/11/1986
4522769	Method for the manufacture of nuclear fuel products An improved method for compression molding typically brittle, particulate ceramic materials comprising uranium dioxide in the manufacture of nuclear fuel products....	06/11/1985
4507267	Heat-aided method for separating the graphite matrix from the nuclear fuel of nuclear reactor fuel elements Removal of the graphite structure from the nuclear fuel material of fuel elements of gas-cooled high-temperature reactors is performed by heat-treatment of the fuel elements in oxygen-containing gas at temperatures below 700° C. until the carbon or graph...	03/26/1985
4432915	Method for producing nuclear fuel pellets, and product thereof A method for improving the physical properties of pressed bodies or pellets formed of particulate nuclear fuel material containing uranium dioxide. The green or unfired pressed bodies comprise a fugitive binder dispersed through the particulate fuel mater...	02/21/1984
4427579	Method of producing fugitive binder-containing nuclear fuel material A nuclear fuel material green body of density from about 30 to 70% of theoretical density having tensile strenght and plasticity adequate to maintain the integrity of the body during processing leading to ultimate sintered condition is produced by adding ...	01/24/1984
4389341	Fugitive binder-containing nuclear fuel material and method of production A nuclear fuel material green body of density from about 30 to 70% of theoretical density having tensile strength and plasticity adequate to maintain the integrity of the body during processing leading to ultimate sintered condition is produced by adding ...	06/21/1983
4367184	Mixed uranium dicarbide and uranium dioxide microspheres and process of making same Nuclear fuel microspheres are made by sintering microspheres containing uranium dioxide and uncombined carbon in a 1 mole percent carbon monoxide/99 mole percent argon atmosphere at 1550° C. and then sintering the microspheres in a 3 mole percent carbon ...	01/04/1983
4189398	Nuclear fuel composition 1. A high temperature graphite-uranium base nuclear fuel composition containing from about 1 to about 5 five weight percent rhenium metal....	02/19/1980
4138360	Fugitive binder for nuclear fuel materials A process for fabricating a body of a nuclear fuel material has the steps of admixing the nuclear fuel material in powder form with a binder of a compound or its hydration products containing ammonium cations and anions selected from the group consisting ...	02/06/1979
4134941	Spherical fuel elements made of graphite for temperature reactors and process for reworking it after the irradiation There are provided pressed spherical fuel elements for high temperature reactors made of a graphite matrix with separate embedded coated fuel and fertile material particles wherein the fuel elements comprise 3 concentric layers including a graphite nucleu...	01/16/1979
4092384	Block fuel element for gas-cooled high temperature reactors The invention concerns a block fuel element consisting of only one carbon matrix which is almost isotropic of high crystallinity into which the coated particles are incorporated by a pressing process. This block element is produced under isostatic pressur...	05/30/1978
4077838	Pyrolytic carbon-coated nuclear fuel An improved nuclear fuel kernel having at least one pyrolytic carbon coating and a silicon carbon layer is provided in which extensive interaction of fission product lanthanides with the silicon carbon layer is avoided by providing sufficient UO2	03/07/1978
4064204	Manufacture of nuclear fuel compacts Nuclear fuel rods are manufactured utilizing a graphite flour-pitch matrix formulation containing an additive. The matrix formulation has a decreased viscosity at fabrication temperatures which permits manufacture of the fuel rods with lower fabrication p...	12/20/1977
4061700	Fugitive binder for nuclear fuel materials A process for fabricating a body of a nuclear fuel material has the steps of admixing the nuclear fuel material in powder form with a binder of a compound or its hydration products containing ammonium cations and anions selected from the group consisting ...	12/06/1977
4056584	Method of making a graphite fuel element having carbonaceous fuel bodies Particulate nuclear fuel material, particulate carbon and pitch are combined with an additive which is effective to reduce the coke yield upon carbonization to mold a green fuel body. The additive may be polystyrene, a styrene-butadiene copolymer, an arom...	11/01/1977
4036920	Process for the preparation of fuel kernels A process for the preparation fuel kernels for coated particle fuels for use in a high temperature gas-cooled reactor comprising granulating a blend of ଲ-1,4-glucan powder, a fissile metal compound such as a thorium, uranium or plutonium compound an...	07/19/1977
4035452	Method of making nuclear fuel bodies Particulate graphite having a particle size not greater than about 1500 microns is impregnated with a polymerizeable organic compound in liquid form. The impregnated particles are treated with a hot aqueous acid solution to at least begin the polymerizati...	07/12/1977
4024209	Method for making nuclear fuel rods A mold cavity is only partially filled with nuclear fuel particles and is closed. The volume of the cavity is then reduced until the fuel particles substantially fill the mold cavity. The mold may be heated and a fluid solidifiable binder injected into th...	05/17/1977
4023446	Band saw grinder According to this invention, two band saw grinder units are constructed in paired relationship, spaced apart, and arranged to receive two band saw bands suspended from overhead supports which will permit the bands to move up and down for the grinding oper...	05/17/1977
4022865	Process for working up block shaped graphite fuel elements There is provided a process for recovering block shaped graphite fuel elements made of a graphite block with a parallel cooling channel and which block contains the fuel arranged in separate zones. The process is especially useful for such fuel elements i...	05/10/1977
3992494	Method of making an oxide fuel compact A method of making an oxide nuclear fuel compact of predominantly open porosity having a density between about 88 and 96 percent of theoretical density. A green compact is formed from a mixture of particulate nuclear fuel oxide and fibrous material and th...	11/16/1976
3978177	Process for the production of graphite molding powder Graphite molding powders are prepared which contain phenol-formaledehyde as a binder and which are intended for use in the manufacture of graphite molded articles, especially fuel inserts, fuel elements and absorber elements for high temperature reactors ...	08/31/1976
3960994	Preparation of high temperature gas-cooled reactor fuel element This invention relates to a method for the preparation of high temperature gas-cooled reactor (HTGR) fuel elements wherein uncarbonized fuel rods are inserted in appropriate channels of an HTGR fuel element block and the entire block is inserted in an aut...	06/01/1976
3940312	Nuclear fuel and process of preparation thereof Vanadium carbide is present in the particles as supersaturated solid solution and the particles are coated with a thin porous layer of vanadium carbide....	02/24/1976

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Class 252/639 - Carbon containing component