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| Number | Title | Issue Date |
| 7578922 | Method for producing hydrogen by chemical process using heat with electricity There is provided a method for thermochemically producing hydrogen from water by using sulfuric acid as a kind of reactant, combining a plurality of chemical reactions inclusive of sulfuric acid decomposition reaction and circulating reactants. The sulfuric acid dec... | 08/25/2009 |
| 7550072 | Method of producing electrolytic hydrogen using rare element-deposit electrode A nitric acid solution containing ions of any one element selected from the group consisting of rare element FP of Ru, Rh and Pd and a rare element of Re is electrolytically reduced by electrolyzing at a constant current to thereby deposit the ions of the element on... | 06/23/2009 |
| 7491345 | Extraction mixture for recovery of actinide elements from acidic solutions Extraction mixture capable of recovering actinide elements such as U, Pu and transplutonium elements from radioactive liquid waste in reprocessing of spent nuclear fuel. One embodiment of the extraction mixture includes a solution of bidentate organophosphorus extra... | 02/17/2009 |
| 7375336 | ZnS(Ag) scintillation detector A ZnS (Ag) scintillation detector comprises a ZnS (Ag) scintillators layer 22 which is excited by incident α-rays and emits a scintillator light, a photomultiplier tube 16 which converts the scintillator light into an electric pulse signal, and a coun... | 05/20/2008 |
| 7366644 | Method of judging practical conditions for use of an ordered alloy under irradiation environments An irradiated state diagram that expresses a relation of a degree of long range order S to a variable R of an irradiated state related to a damage rate and an irradiation temperature is prepared according to an ordered structure of an alloy on basis of an evaluation... | 04/29/2008 |
| 7361235 | Method for producing dispersed oxide reinforced ferritic steel having coarse grain structure and being excellent in high temperature creep strength A method of manufacturing an oxide dispersion strengthened ferritic steel excellent in high-temperature creep strength having a coarse grain structure. The method comprises mixing alloy powders and an Y2O3 powder, subjecting the mixed powder to... | 04/22/2008 |
| 7326368 | Fluid in liquid state containing dispersed nano-particles of metal or the like Nano-particles 1 of a metal or the like are dispersed in a liquid fluid 2. Thereby, the reactivity or toxicity of the liquid fluid can be reduced when the liquid fluid has reactivity or toxicity. The flow resistance of the liquid fluid can be raised, a... | 02/05/2008 |
| 7323153 | Reprocessing method by fluoride volatility process using fractional distillation Fluorine or a fluorine compound is subjected to a reaction with a spent oxide fuel to produce fluorides of uranium and plutonium, and recovering the fluorides using a difference in volatility behavior. The method includes steps of: subjecting a mixture of UO2 | 01/29/2008 |
| 7323032 | Pyrochemical reprocessing method for spent nuclear fuel This invention is provided for improvement of corrosion-resistant property of a crucible and for promotion of safety in a pyrochemical reprocessing method for the spent nuclear fuel. The spent nuclear fuel is dissolved in a molten salt placed in the crucible. In a p... | 01/29/2008 |
| 7279139 | Agitation type powder dissolving apparatus for reprocessing spent nuclear fuel An agitation type powder dissolving apparatus comprises a dissolving tank into which powder of spent nuclear fuel is to be supplied, an agitating member rotatably disposed in the dissolving tank, and rise inhibiting structure, disposed in the dissolving tank above t... | 10/09/2007 |
| 7273584 | Method of manufacturing oxide dispersion strengthened martensitic steel excellent in high-temperature strength having residual α-grains An oxide dispersion strengthened martensitic steel excellent in high-temperature strength having residual α-grains can be manufactured by a method comprising mixing either element powders or alloy powders and a Y2O3 powder; subjecting the resu... | 09/25/2007 |
| 7214318 | Method for separation of actinide elements A method for separation of actinide elements comprising feeding a solution containing actinide elements such as americium, curium, californium and the like, into a resin column in which a weakly basic primary, secondary or tertiary anion exchange resin obtained by r... | 05/08/2007 |
| 7210915 | Powder compacting apparatus A powder compacting apparatus (1) has a top plate (3), a die plate (9) and a bottom plate (12), combined with each other as follows. The top plate (3) holds upper punches (4) in place by punch holders (5), and the die... | 05/01/2007 |
| 7208129 | Reprocessing method by fluoride volatility process using solid-gas separation Fluorine or a fluorine compound is subjected to a reaction with a spent oxide fuel to produce fluorides of uranium and plutonium, and the fluorides are recovered using a difference in volatility behavior. The spent oxide fuel is subjected to a reaction with an HF ga... | 04/24/2007 |
| 7194360 | Method of determining radioactive nuclides A method of simply and quickly determining α-ray releasing nuclides having long half-life without carrying out a chemical separation is provided. By inputting a data of pulses incident to an α-ray detector in a computer, obtaining time distribution of the i... | 03/20/2007 |
| 7141795 | Radioactivity measuring apparatus using optical fiber An elongated, thinner apparatus is provided so as to measure surface contamination in narrow places and piping. An elongated plate-shaped radioactivity detection section (10) provided with a scintillator and a radioactivity measuring section (12) provi... | 11/28/2006 |
| 7037464 | Dispersed oxide reinforced martensitic steel excellent in high temperature strength and method for production thereof In an oxide dispersion strengthened martensitic steel which comprises, by % by weight, 0.05 to 0.25% C, 8.0 to 12.0% Cr, 0.1 to 4.0% W, 0.1 to 1.0% Ti, 0.1 to 0.5% Y2O3 with the balance being Fe and unavoidable impurities and in which Y2 | 05/02/2006 |
| 7011798 | Process for reprocessing spent nuclear fuels by utilizing phenomenon of cocrystallization A reprocessing process of spent nuclear fuels for roughly separating U and U—Pu from FP, TRU and the like in a nitric acid solution of spent nuclear fuels by utilizing phenomenon of cocrystallization of hexavalent U and Pu. For example, spent nuclear fuels are she... | 03/14/2006 |
| 6976947 | Centrifugal extractor of non-contact journaled construction A centrifugal extractor of non-contact journaled construction is provided in which, even under the environments of corrosive gase and mist-like liquid such as nitric acid mist generated in the reprocessing of a spent nuclear fuel, no problem in corrosion or deterior... | 12/20/2005 |
| 6843921 | Method of separation and recovery of elements from radioactive liquid wastes A method of separation and recovery of elements from radioactive liquid wastes, includes a step of bringing into contact a high-level radioactive liquid waste containing separation target elements including Americium, Curium, Zirconium, Molybdenum, Palladium and rar... | 01/18/2005 |
| 6793894 | Pyrochemical reprocessing method for spent nuclear fuel and induction heating system to be used in pyrochemical reprocessing method This invention is provided for improvement of corrosion-resistant property of a crucible and for promotion of safety in a pyrochemical reprocessing method for the spent nuclear fuel. The spent nuclear fuel is dissolved in a molten salt placed in the crucible. In a p... | 09/21/2004 |
| 6792069 | Apparatus for inspecting a heat exchanger tube and group of heat exchanger tubes An apparatus for non-destructively inspecting an arbitrary heat exchanger tube among a group of heat exchanger tubes. The apparatus includes a radiation detector inserted in a heat exchanger tube to be inspected, at least one radiation source inserted in a plurality... | 09/14/2004 |
| 6700125 | Radioactive dust monitor A radioactive dust monitor comprising a dust collecting electrode serving also as a radiation detecting surface, an ionization line extending in air in a spaced relation with the dust collecting electrode and a radiation detection part. The radiation dete... | 03/02/2004 |
| 6699169 | Centrifugal extractor with neutron absorption body A centrifugal extractor has a rotor supported rotatably in a housing 10, and an aqueous phase liquid and an organic phase liquid are supplied to the outer circumference of the rotor and mixed between the housing and the rotor. A mixed phrase liquid is suc... | 03/02/2004 |
| 6672258 | Intermediate heat exchanger-incorporated type steam generator An intermediate heat exchanger-incorporated type steam generator having an intermediate heat exchanger tube 20 and a steam generating heat exchanger tube 22 disposed separately in a vessel 10 storing a secondary coolant 14 therein. A pump mechanism is mad... | 01/06/2004 |
| 6657202 | Multiple-eye type dose distribution measuring method A dose distribution-measuring method capable of grasping a three-dimensional form of an object to be measured or evaluating a three-dimensional dose distribution thereof. The method comprises providing a multiple-eye type radiation meter probe in which at... | 12/02/2003 |
| 6594333 | Thermal load reducing system for nuclear reactor vessel The present invention is used to reduce thermal load itself, being the cause to generate stress, which develops near liquid surface in a nuclear reactor wall and to contribute to further improvement of safety. A partition member (5) is arranged above a co... | 07/15/2003 |
| 6568467 | Helical type heat exchanger having intermediate heating medium A heat exchanger having an intermediate heating medium has a shell of the heat exchanger, a plurality of cylindrical partition tubes each of which has an annular space therein and is closed at both end portions thereof with annular walls, the cylindrical ... | 05/27/2003 |
| 6561265 | Heat exchanger having intermediate heating medium A heat exchanger having an intermediate heating medium is provided. A multiplicity of inner tubes 2 are disposed in a shell 1 of a heat exchanger 10. A low-temperature heating medium Y (water) flows in these inner tubes and a high-temperature heating medi... | 05/13/2003 |
| 6431860 | Material feeding mechanism in association with continuous sintering apparatus In a material feeding mechanism in association with a continuous sintering apparatus, a material (S) carried by a transporting conveyer (1) into an atmosphere-displacement chamber (2) is fed into a furnace casing (4) of the continuous sintering apparatus ... | 08/13/2002 |
| 6296256 | Airtight adapter and a replacement method therefor An airtight adapter to be mounted to an airtight unit requiring airtightness, e.g. a glove box, with which it is possible to easily replace a part of the airtight adapter while maintaining airtightness. The adapter has an outer-cylinder adapter body, an i... | 10/02/2001 |
| 6275747 | Microcomputer and its access speed control method A microcomputer usable for a long period of time even when disposed in a high dose radiation-exposed environment, and its access speed control method are provided. According to the microcomputer and the method, the total dose of radiation that the microco... | 08/14/2001 |
| 6250125 | Method for producing iron-base dispersion-strengthened alloy tube A method of producing an iron-based dispersion-strengthened alloy tube (2-1) by utilizing a rolling machine having grooved rolls (5, 5-1) and a mandrel (9)for forming the tube (2-1) from a raw rolling tube (2). In the method, a length of contact between a... | 06/26/2001 |
| 6233299 | Assembly for transmutation of a long-lived radioactive material A new transmutation assembly permits an efficient transmutation of a long-lived radioactive material (long-lived FP nuclides such as technetium-99 or iodine-129) which was produced in the nuclear reactor. Wire-type members of a long-lived radioactive mate... | 05/15/2001 |
| 6164023 | Compressive/Tensile-Load-Type Damper made of lead and seismic isolation apparatus using the same A compressive/tensile-load-type lead damper absorbs vibration energy by elastic-plastic deformation through bending of lead. The lead damper has a semicircular structural portion at a central portion, and compressive/tensile load input points at opposite ... | 12/26/2000 |
| 6105887 | Method for homogeneously mixing uranium/plutonium mixed oxide A method for homogeneously mixing a uranium/plutonium mixed oxide which is used for the preparation of a uranium/plutonium mixed oxide fuel. The method comprises weighing a uranium oxide powder, a plutonium oxide powder, and a dry recovered powder prepare... | 08/22/2000 |
| 6056827 | Laser decontamination method A laser decontamination method includes the steps of incorporation of a condenser lens in a gas supply nozzle, supplying a gas toward a contaminated member while moving the gas supply nozzle relatively to and along a surface of the contaminated member wit... | 05/02/2000 |
| 6045357 | Continuous sintering plant integrated with glove box for maintenance use A continuous sintering apparatus to be used for sintering nuclear fuel pellets includes a casing integrally constructed to have an upper portion enclosed in a maintenance glove box. The furnace casing includes a casing body and a ceiling cover removably m... | 04/04/2000 |
| 6023116 | Electromagnetic rotary vibrator for a rotary body An apparatus for electromagnetically and rotationally vibrating a rotary body that is supported by bearings. The apparatus comprises a ring-shaped magnet bipolarly magnetized and mounted coaxially on a shaft of the rotary body, a ring-shaped stator having... | 02/08/2000 |
| 5948127 | Cyclone dust collector A cyclone dust collector wherein the interior of a cyclone body is divided into an upper space and a lower space by a partition member provided with a plurality of cylindrical filters, a suction port is so provided as to communicate with the lower space, ... | 09/07/1999 |
