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| Number | Title | Issue Date |
| 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 |
| 6086652 | Method and apparatus for initial purification of liquid metal heat exchange fluid A method for removing oxides from a liquid metal heat exchange fluid following the initial startup of the heat exchange system fixes oxygen by locating an oxygen scavenging material in a drain tank. During initial fabrication and periods of maintenance me... | 07/11/2000 |
| 6086654 | Hydride removal method for liquid metal heat exchange fluid in high hydrogen permeation environment A method for purifying liquid metal heat exchange fluids uses a contacting drum in combination with purifiers to control metal hydride precipitation in a process with high hydrogen permeation. The contacting drum receives a slip stream of a circulating li... | 07/11/2000 |
| 5461648 | Supercritical water oxidation reactor with a corrosion-resistant lining A supercritical water oxidation reactor includes a vessel with an interior urface, two cooling sections, a heat exchanger, an oxygenating section, a pump, and a trap. The interior surface of the vessel has a corrosion-resistant, artificial ceramic or diamo... | 10/24/1995 |
| 5289511 | Liquid-metal cooled nuclear reactor In a liquid-metal cooled nuclear reactor using liquid metal as a coolant and having vessels and pipings for accommodating the liquid metal coolant, at least pat of the region surrounding a coolant pressure boundary defined at outer wall surfaces of the ve... | 02/22/1994 |
| 5149493 | Installation to regenerate cold traps loaded with the hydride and oxide of a liquid metal Installation and method to regenerate cold traps loaded with the hydride and oxide of a metal, such as sodium, in its liquid state. A forced circulation of the orginal liquid metal of a tank (11) is created at a temperature sufficient to dissolve the soli... | 09/22/1992 |
| 5108697 | Inhibiting stress corrosion cracking in the primary coolant circuit of a nuclear reactor A primary coolant circuit for cooling a nuclear reactor has wetted mechanically stressed nickel base alloy components such as Alloy 600 tubes in steam generators having oxidized surfaces comprising 1-10 w/o zinc, which tubes are inhibited against primary ... | 04/28/1992 |
| 5030411 | Removal of impurities from coolant of a nuclear reactor The coolant is circulated thorugh the core of the reactor by a pump between a higher-pressure plenum and a lower-pressure plenum. The impurities are removed by a cold trap between the higher-pressure plenum and the lower-pressure plenum. The trap is an in... | 07/09/1991 |
| 4928497 | Cold trap for the purification of a liquid metal having separate trapping zones It comprises an enclosure (1), a supply pipe (8) for introducing the liquid metal to be purified into enclosure (1), a distributor (10) for distributing the liquid metal on the periphery of the enclosure, cooling means (30, 32, 34) positioned externally o... | 05/29/1990 |
| 4892653 | Cold trap for the purification of liquid metals containing dissolved impurities Cold trap for the purification of liquid metals containing dissolved impurities comprises several independently operating cooling modules, so as to bring about the crystallization of impurities, a liquid metal supply pipe, a purified liquid metal discharg... | 01/09/1990 |
| 4830816 | Getter trap for removing hydrogen and oxygen from a liquid metal A getter trap to remove hydrogen and oxygen from a liquid metal, such as liquid sodium, includes an elongated, closed housing having an inlet at one end thereof and an outlet at the other end. A getter material is randomly diposed within the housing compr... | 05/16/1989 |
| 4816209 | Method and apparatus for separating radioactive constituents from gas or vapors escaping accidentally from nuclear reactors To separate tritium from gases and/or vapors escaping accidentally from a clear reactor, before the gases or vapor are discharged into the atmosphere, the gases or vapor are fed through a line 5 into a reservoir 3 of deionized light water which is maintai... | 03/28/1989 |
| 4737281 | Cold trap for purifying liquid sodium containing impurities Cold trap for purifying liquid sodium containing impurities of the type comprising, in a sealed enclosure cooled by a cooling fluid flowing in contact with its outer surface, in the upper part an economizer for lowering the temperature of the hot sodium a... | 04/12/1988 |
| 4713214 | Device for purifying liquid metal coolant for a fast neutron nuclear reactor Device for purifying liquid metal coolant for a fast neutron nuclear reactor, comprising a pump (6) for circulating the liquid metal, the metal then being purified and heated after purification, as well as a filter (24) of metallic fibers. It consists of ... | 12/15/1987 |
| 4693088 | Cold trap for eliminating impurities from a polluted liquid metal Cold trap for eliminating the impurities present in a polluted liquid metal. It comprises a body provided with an intake pipe for the polluted liquid metal and an internal structure defining a passage for the metal, said structure being successively provi... | 09/15/1987 |
| 4683056 | Cold trap apparatus Cold trap apparatus for the purification of liquid metal such as sodium comprises a cooled vessel (20) within which a number of concentric cylinders (23) are located such that the liquid metal flow takes place downwardly in the gap between the vessel (20)... | 07/28/1987 |
| 4581200 | Method and apparatus for removing hydrogen from secondary cooling systems of fast breeder reactors Removal of hydrogen impurities from a secondary cooling system of a liquid sodium cooled, fast breeder reactor is accomplished by providing a hydrogen-removing container, which may be a tank, in the secondary cooling system. The container has a sodium coo... | 04/08/1986 |
| 4488964 | Apparatus for removing a radioactive substance from a molten metal An apparatus for removing a radioactive substance from a molten metal which comprises a cold trap for crystallizing an impurity out of the molten metal; a radioactive substance-adsorbing unit which communicates with the cold trap and in which a radioactiv... | 12/18/1984 |
| 4432208 | Cold trap A cold trap including a section for cooling inflowing liquid sodium, a section for trapping impurities in the sodium, and a double-walled cylindrical structure disposed between the cooling section and the trapping section. The double-walled structure is f... | 02/21/1984 |
| 4389310 | Cold trap A cold trap disposed in a system in which liquid sodium is circulated as a heat exchanging medium, and adapted for removing impurities from the liquid sodium. The cold trap has a vessel in which defined are a cooling zone for cooling the liquid sodium con... | 06/21/1983 |
| 4291865 | Radial cold trap The radial cold trap comprises a housing having a plurality of mesh bands disposed therein. The mesh bands comprise concentrically arranged bands of mesh with the mesh specific surface area of each band increasing from the outermost mesh band to the inner... | 09/29/1981 |
| 4290822 | Process for cleaning a cold trap A cold trap incorporated into a liquid metal circuit is cleaned by introducing an alkali metal hydroxide in liquid state into the trap and in excess compared with solubility limits of deposited impurities, then heating the trap to totally transform the im... | 09/22/1981 |
| 4278499 | Apparatus for the purification of a liquid metal for cooling in the core of a fast neutron reactor Apparatus for the purification of the liquid metal for cooling the core of a fast neutron reactor comprising a heat insulating envelope immersed in the reactor core and suspended from the protective slab surmounting the latter, a removable plug disposed i... | 07/14/1981 |
| 4191558 | Sodium purification apparatus and method An apparatus for and method of collecting and storing oxide impurities contained in high-temperature liquid alkali metal. A method and apparatus are provided for nucleating and precipitating oxide impurities by cooling, wherein the nucleation and precipit... | 03/04/1980 |
| 4156659 | Method of manufacturing a reducing gas useful in a direct reduction process A method of reforming a fluid to make it suitable for use as a reducing gas in a direct reduction process is provided. The method is also taught in conjunction with a specific process for which it is particularly suited. The method uses a high-temperature... | 05/29/1979 |
| 4088533 | Radionuclide trap The deposition of radionuclides manganese-54, cobalt-58 and cobalt-60 from liquid sodium coolant is controlled by providing surfaces of nickel or high nickel alloys to extract the radionuclides from the liquid sodium, and by providing surfaces of tungsten... | 05/09/1978 |
| 4075060 | Method for removing fission products from a nuclear reactor coolant A method for removing cesium 137, iodine 131 and tritium from a liquid sodium reactor coolant. Hydrogen is introduced into the liquid sodium causing sodium hydride to precipitate in a cold trap. The cesium iodine and tritium isotopes are removed from the ... | 02/21/1978 |
| 4038060 | Apparatus for treating an exhaust gas from nuclear plant In an apparatus for treating an exhaust gas from a nuclear plant which comprises a container and a cryogenic distillation apparatus disposed in the container for liquefying and separating a radioactive gas therefrom, an adsorbent such as an active carbon ... | 07/26/1977 |
| 4012490 | Removing radioactive noble gases from nuclear process off-gases A system for separating, concentrating and storing radioactive krypton and xenon in the off-gases from a boiling water reactor, wherein adsorption and cryogenic distillation are both efficiently used for rapid and positive separation and removal of the ra... | 03/15/1977 |
| 4010068 | Removal of radioactive contamination from a nuclear reactor coolant A system for removing radioactive fission products from a liquid metal reactor coolant. Isotopic diluents and reacting compounds are added to hot liquid sodium. The reactants isotopically exchange or chemically react with the fission products and are prec... | 03/01/1977 |
| 3962082 | Liquid metal cold trap A cold trap assembly for removing impurities from a liquid metal being provided with a hole between the incoming impure liquid metal and purified outgoing liquid metal which acts as a continuous bleed means and thus prevents the accumulation of cover gase... | 06/08/1976 |
| 3941586 | Method and apparatus for regenerating cold traps within liquid-metal systems Oxide and hydride impurities of a liquid metal such as sodium are removed from a cold trap by heating to a temperature at which the metal hydroxide is stable in a molten state. The partial pressure of hydrogen within the system is measured to determine if... | 03/02/1976 |
