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JPH0693349A |
PURPOSE: To enable recovery of a metal vaporized from a long crucible for vaporizing the metal and stuck on the surface of a metal recovery plate by easily flowing the molten metal along the wetted surface. CONSTITUTION: In this device, ...
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JPH0688149A |
PURPOSE: To remove the radioactive element component incorporated into a titanium-contg. material which is a raw material for production of titanium tetrachloride by a simple means. CONSTITUTION: The titanium-contg. material is subjected...
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JPH0688897A |
PURPOSE: To enhance the extraction efficiency of Pu by bringing an aq. soln. containing U, Pu and a fission product into contact with a org. soln. containing a crown compd. and subsequently bringing the same into contact with water or an...
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JPH0627290A |
PURPOSE: To provide a method and device wherein plutonium and/or other radioactive element present in solid or a liquid product is, by microwave heating, dissolved in an aqueous solution, and, a solid or liquid product contaminated with ...
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JPH0585486B2 |
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JPH05271821A |
PURPOSE: To recover homogeneous and pure UF6 of a desired isotope existence ratio by subjecting a high U235-content alloy to a fluorination treatment, subjecting the formed gaseous mixture to a distillation treatment, recovering the pure...
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JPH05212382A |
PURPOSE: To provide a method for selectively reducing the content of a heavy metal in a waste stream to sub-ppm level in the removal of a heavy metallic ion from the waste stream containing a complex anion. CONSTITUTION: An ion exchange ...
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JPH05212205A |
PURPOSE: To selectively extract actinide in an organic solvent by adding thiocyanate to an aqueous nitric solution and by contacting the solution with the organic solvent containing a specific propane diamide. CONSTITUTION: When actinide...
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JPH05504997A |
A process for the deoxidation of a refractory metal containing minor concentrations of oxygen is disclosed. In this process the refractory metal is contacted with a metallic deoxidant in a dry, inert atmosphere. The metallic deoxidant an...
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JPH0550329B2 |
In a process for continuously separating uranium isotopes, 235U and 238U, by oxidation-reduction chromatography using a column of an anion exchanger, the separation of uranium isotopes and the regeneration of the oxidizing agent and redu...
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JPH05180989A |
PURPOSE: To accelerate melting and removing of a radioactive nuclide by a method wherein a process of changing a state and a condition of the radioactive nuclide in a titanium iron material is carried out, and then it is leached with an ...
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JPH0547606B2 |
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JPH0545000B2 |
The invention relates to a process for recovering the plutonium contained in the solid waste, such as process, technological and laboratory waste. The waste is contacted with aqueous nitric acid solution having a nitric acid concentratio...
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JPH05163538A |
PURPOSE: To provide a method for producing uranium metal executable at the m.p. of uranium or below. CONSTITUTION: Uranium chloride 19 is reacted with either 22 magnesium, solium or calcium in the presence of a molten salt 16 composed of...
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JPH0534286B2 |
High-purity uranium can be effectively recovered from gadolinium-containing nuclear fuel scraps by dissolving the scraps in a mineral acid, extracting uranium from the resulting solution with a solvent, washing the organic phase with wat...
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JPH0518076B2 |
In the process for treating irradiated nuclear fuel to effect separation of uranium plutonium other higher actinides, and fission products, in which nitric acid treatment, followed by solvent extraction, then backwashing the reduction of...
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JPH0559463A |
PURPOSE: To produce metallic actinoid without generating α-radioactive process waste. CONSTITUTION: Actinoid oxide as starting material is mixed with carbon powder and pelletized to form green pellets. These pellets are heated to a high...
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JPH054930B2 |
PURPOSE:To simply separate U and trace rare earth elements also without necessitating a large apparatus by adding chelating agent to an oxidizing soln. contg. U and rare earth element and then adding with aq. ammonia or gaseous ammonia. ...
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JPH0478694B2 |
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JPH0470370B2 |
A process for the separation of the actinides and lanthanides present in the trivalent state in an acid aqueous solution, wherein the actinides present in such aqueous solution are extracted selectively in an organic solvent by bringing ...
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JPH04276035A |
PURPOSE: To decrease the treatment cost, to easily control the reaction atmosphere and to recover uranium at high yield so that the method can be used for a practical plant which purposes to recover uranium and that an uranium- contg. ph...
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JPH0458593B2 |
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JPH04186683A |
PURPOSE: To let a pulse cycle to reach a target cycle and use laser output more efficiently by forcing two pulse light to enter the same beam splitter from each opposite side and lapping one reflected by pulse light with the other permea...
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JPH0435227B2 |
The density and capacity of macroporous ion exchange resins are increased by incorporating therein at least one of titania hydrate, zirconia hydrate, hydrated titanium phosphorous, and hydrated zirconium phosphate hydrates. Such resin co...
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JPH04107225A |
PURPOSE: To develop a crucible for evaporating uranium where evaporation efficiency can be improved without deteriorating heat insulating effect by arranging mixedly tungsten powders and tungsten blocks in an evaporating crucible where t...
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JPH044983B2 |
This invention relates to a process of recovering trivalent actinides, trivalent lanthanides or mixtures thereof from an aqueous acid solution by contacting the aqueous solution with an organic solution containing the diamides of the for...
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JPH0380057B2 |
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JPH03285032A |
PURPOSE: To easily and quickly execute melting of metallic uranium by giving magnetic field rotation in a nozzle to molten metallic uranium, injecting it into oxidizing atmosphere from the small holes thereof an dissolving the generated ...
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JPH0362456B2 |
An inorganic adsorbent comprising a porous titanium metal and titanium oxide sintered and impregnated on the surfaces of micropores of the porous titanium metal can be produced by impregnating the porous titanium metal with a titanium al...
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JPH0360763B2 |
A process for preparing uranium peroxide in a fluidized bed by precipitation of a uranium peroxide solution obtained from the reaction of uranyl sulfate or uranyl nitrate solutions having a concentration of uranium between about 0.5 and ...
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JPH0359756B2 |
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JPH0357054B2 |
1. A process for separation of the molybdenum contained in sulphuric or nitric solutions of uranium using, for precipitating the molybdenum, a product which belongs to the family of hydroxyoximes of the general formula R-C(=N-OH)-CH(-OH)...
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JPH03173728A |
PURPOSE: To produce a sponge metal by bringing fine metallic powder into contact with molten Mg to wet the surface of the fine metallic powder with the Mg, then cooling the fine metallic powder to solidify the Mg and further heating the ...
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JPH0344133B2 |
A method for melting a charge of reactive metals or metal alloys is disclosed in which the charge is induction melted in a segmented crucible in the absence of insulating slag, under a non-reactive environment utilizing an induced altern...
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JPH0338896B2 |
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JPH03131322A |
PURPOSE: To stabilize the quantity of evaporation, an evaporation direction and vapor density by controlling the height of at least either one of a raw material container and an electron gun to control the incident angle of electron beam...
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JPH0390524A |
PURPOSE: To generate metal vapor of the amt. stable over a long time in a crucible for evaporation contg. a porous layer to be impregnated and held with a molten metal by boring holes larger than the pores of the porous layer on the surf...
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JPH0386215A |
PURPOSE: To drastically improve efficiency in vaporizing raw metal by irradiating the plural bodies impregnated with molten metal alternately with the electron beam emitted from an electron beam generator. CONSTITUTION: A vaporizing cruc...
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JPH0386216A |
PURPOSE: To eliminate an adverse effect of an electron beam on the heating and vaporization of molten metal by inclining at least the upper surface of a porous body impregnated with molten raw metal downward from the electron beam irradi...
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JPH0325490B2 |
PURPOSE:To reduce the cost of recovery of bringing a soln. contg. dissolved Mo, U and V prepd. by leaching with a mineral acid into contact with an ion exchange resin and by adjusting the soln. to a specified pH so as to separate and rec...
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JPH0321019B2 |
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JPH0319169B2 |
PURPOSE:To recover effectively uranium excellent in the purity by dissolving the nucleus fuel scrap contg. Gd2O3 in a mineral acid to solvent-extract uranium, washing an organic phase contg. uranium and thereafter back-extracting it with...
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JPH0328130A |
PURPOSE: To recover uranium from marine water with adsorption beds reduced in costs, increased efficiency in contact with marine water, and facilitated transportation of the adsorbent, by bundling filament fibers and fibrous adsorbent, a...
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JPH037608B2 |
The invention is a novel method for the recovery of uranium from dry, particulate uranium tetrafluoride. In one aspect, the invention comprises reacting particulate uranium tetrafluoride and calcium oxide in the presence of gaseous oxyge...
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JPH03500337A |
A process for removing transuranic elements from a waste chloride electrolytic salt containing transuranic elements in addition to rare earth and other fission product elements so the salt waste may be disposed of more easily and the val...
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JPH0253372B2 |
The present invention provides a process for producing a uranium oxide by dissolving a yellow cake in sulfuric acid or hydrochloric acid, bringing the obtained solution into contact with a chelating resin of diaminocarboxylic acid type a...
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JPH0251850B2 |
A process for separately recovering uranium and hydrofluoric acid from a waste liquor containing uranium and fluorine comprises a neutralizing precipitation step wherein a magnesium compound is added to the waste liquor containing uraniu...
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JPH0249761B2 |
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JPH0249255B2 |
An improvement in effecting uranium recovery from phosphoric acid solutions is provided by sparging dissolved oxygen contained in solutions and solvents used in a reductive stripping stage with an effective volume of a nonoxidizing gas b...
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JPH02234099A |
PURPOSE: To reduce the number of refining cycles for U and Pu of irradiated fuel within the reprocessing facility by extracting U (VI) and Pu (IV) ions in an acid solution by using a mixture of N, N-dialkylamide. CONSTITUTION: A solution...
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