| Patent Number |
Title Of Patent |
Date Issued |
| 6210497 |
Super heat-resisting Mo-based alloy and method of producing same |
April 3, 2001 |
| A super heat-resisting molybdenum-based alloy is disclosed. The alloy includes two or more alloying elements, the type and amount of the alloying elements being determined such that their average d-orbital energy level (average Md) and average bond order (average Bo) satisfy the foll |
| 6072495 |
Object search method and object search system |
June 6, 2000 |
| In a search method and system for reducing the number of memory page-in/page-out operations to display, three dimensional objects are extracted through space search. The system comprises a parameter accepting module (22) which accepts parameters from a user to set up a view volume, a |
| 6067337 |
Multiple-sheathed sodium leakage detection apparatus |
May 23, 2000 |
| A multiple-sheathed sodium leakage detection apparatus capable of detecting a small amount of leakage of sodium due to a breakage of a well for temperature measurement at an early stage of the leakage. The apparatus is a combination of a multiple-sheathed sodium leakage detector having a |
| 6020619 |
Radioactive rays detection semiconductor device |
February 1, 2000 |
| The present invention intends to provide a radioactive rays detection semiconductor device comprises a substrate, an insulating layer formed on the substrate, p-type Si films formed on the insulating layer and equal in resistance value change rates due to temperature change and different |
| 5965003 |
Method of decomposing CMPO |
October 12, 1999 |
| CMPO is safely, reliably and rapidly decomposed under mild conditions. A CMPO-containing substance is emulsified in an electrolyte comprising an oxidation promoter (silver ion) by an emulsifier in an emulsifying tank, this electrolyte comprising the CMPO-containing substance is supplied |
| 5896926 |
Packer type groundwater sampling system and water sampling method |
April 27, 1999 |
| The present invention provides a system and a method for sampling groundwater under in-situ condition state in reliable, efficient and economic manner without disturbing environment of formation water present in under-ground layer. There are provided a continuous water sampling proce |
| 5880426 |
Indirectly-cooled plasma jet torch |
March 9, 1999 |
| An indirect cooling system suitable for a plasma jet cutting method is established to prevent the leakage of cooling water and to enable a stable plasma jet to be obtained. A tip having a nozzle for emitting a plasma jet is fitted to a nozzle sleeve through which cooling water circulates |
| 5869626 |
Metal-encapsulated fullerene compound and a method of synthesizing such compound |
February 9, 1999 |
| A novel metal-encapsulated fullerene compound wherein a side chain is introduced in a metal-encapsulated fullerene is provided.A metal-encapsulated fullerene compound represented by the following structural formula (1) is synthesized by causing a disilirane derivative or digermirane deri |
| 5838843 |
Multipurpose optical sensor |
November 17, 1998 |
| A multipurpose optical sensor including an even number of optical fiber bundles, and optical systems for converting light guided through optical fiber bundles and leaving leading ends of optical fiber bundles into a substantially parallel light beam in a direction at right angles with th |
| 5834867 |
Electromagnetic rotary vibrator and damper for a rotary body |
November 10, 1998 |
| 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 a coil and adapted to generate a |
| 5826203 |
Method for solidifying waste containing radioactive iodine |
October 20, 1998 |
| A method for solidifying a radioactive iodine-containing waste, in which volatilization of radioactive iodine outward can be suppressed during solidification, and a solidified waste having a high level of confinement of radioactive iodine and a long term stability can be obtained. The |
| 5767400 |
Hydraulic test system mounted with borehole television set for simultaneous observation in front |
June 16, 1998 |
| The present invention provides a hydraulic test system, by which it is possible to select a proper position and to select a reliable measurement interval corresponding to said position, to obtain information for preventing retention or leaving of the equipment in the borehole, and to |
| 5753177 |
High-Ni austenitic stainless steel having excellent high-temperature strength |
May 19, 1998 |
| A high-Ni austenitic stainless steel having swelling resistance, high-temperature creep strength, and phase stability under irradiation. The irradiation resistance and high-temperature strength of the high-Ni austenitic stainless steel are enhanced when it is composed of the followin |
| 5740216 |
Vertical seismic isolation structure of common deck system for nuclear reactor components |
April 14, 1998 |
| A vertical seismic isolation structure is capable of achieving vertical seismic isolation of nuclear reactor components connected to each other by primary pipings, while suppressing the relative displacement with respect to the primary pipings. A nuclear reactor vessel, circulating pumps |
| 5732983 |
Thermal expansion-absorbing structure for pipe arrangement |
March 31, 1998 |
| A thermal expansion-absorbing structure for piping, which is attached to a pipe end, is provided. A semicircular form of torus shell is joined to a cylindrical form of short double pipe to define together a U-shaped longitudinal section, which is deformed due to the expansion or cont |
| 5717141 |
Method and apparatus for evaluating vibrations of a rotary body while maintaining the rotary bod |
February 10, 1998 |
| A method and apparatus for evaluating the vibration of a rotary body in a static or non-rotational state to determine a profile of critical speeds including profiles of critical speeds which exist beyond a rated revolution velocity of the rotary body. This invention comprises: a plur |
| 5717076 |
Metal-encapsulated fullerene derivative compound of and method for making the derivative |
February 10, 1998 |
| There are provided a derivative of a metal-encapsulated fullerene having application as a functional material, superconducting material, electronics material or pharmaceutical material, and a method of synthesizing this derivative. The derivative of a metal-encapsulated fullerene hav |
| 5708958 |
Method of separating trivalent actinides and rare earth elements |
January 13, 1998 |
| A method is provided for separating trivalent actinides and rare earth elements in the TRUEX method using a CMPO-TBP mixed solvent. The method of separating trivalent actinides and rare earth elements comprises a trivalent actinide/rare earth extraction step wherein trivalent actinides |
| 5699284 |
Thermal design method for structures and optimum numerical calculation devices for such designs |
December 16, 1997 |
| A design method for structures is invented, taking into account the effects of fluid temperature fluctuations, comprising: numerical calculations of time-averaged solutions for the motion equation and energy equation for fluids; a Process 1 in which the low-cycle components of the temper |
| 5678167 |
Method for dissolving nuclear fuels |
October 14, 1997 |
| The powdered form of nuclear fuels such as uranium dioxide and plutonium dioxide are dispersed in an about 3N aqueous nitric acid solution, and irradiated by UV rays at a wavelength of approximately 300 nm in order to improve a dissolving rate of the nuclear fuels. This enables easy and |
| 5650051 |
Hydrogen generating method using gamma rays |
July 22, 1997 |
| Gamma rays are applied to a suspension which includes water and a catalyst having an element of platinum group metal carried on a semiconductor, thereby decomposing the water so as to produce hydrogen. The energy of gamma rays emitted from a nuclear reactor can be utilized to achieve a |
| 5640710 |
Method for melt-decontaminating metal contaminated with radioactive substance |
June 17, 1997 |
| A flux for effectively melt-decontaminating a zircaloy contaminated with a radioactive contaminant Pu.sub.2 O.sub.3 is provided. The flux comprises a mixture of a metal flux of a metal (e.g. Ca or Mg) having a higher chemical activity than plutonium at a temperature above the melting poi |
| 5638414 |
Method for detecting failure of nuclear reactor fuel |
June 10, 1997 |
| The present invention provides a method for identifying failed fuel elements and the scale of damage accurately, quickly and at low cost without disassembling a fuel assembly and without discharging radioactive waste. Radiation detector(s) for measurement of gamma radiation emitted f |
| 5629965 |
Diving bell type control rod equipped with sodium inflow port |
May 13, 1997 |
| A diving bell type control rod of sodium bond type. The control rod including a plurality of control elements each comprising a pellet chamber for packing B.sub.4 C pellets and disposed in a cladding tube, an intermediate plug disposed above the pellet chamber, an upper chamber forme |
| 5617691 |
Fitting structure of rectangular parallelopipedal blocks |
April 8, 1997 |
| A fitting structure of a plurality of rectangular parallelopipedal blocks comprising concavo-convexities formed on the surfaces of each of the blocks. The concavo-convexities are formed on each surface of the block on the basis of a figure which is in symmetry of rotation per 90.degree. |
| 5594548 |
In-furnace inspection machine utilizing a double-walled structure |
January 14, 1997 |
| A machine for inspecting the surface conditions of structural members within a furnace, particularly within a furnace operating at a high temperature or with a highly radioactive environment, such as a melting furnace for processing radioactive wastes. The machine comprises a laser-t |
| 5589140 |
Continuous denitration apparatus |
December 31, 1996 |
| A continuous denitration apparatus capable of ensuring mass processing of a nitrate solution of a nuclear fuel and a continuous stable operation. By a rotation of screws, uranium nitrate solution supplied from a liquid feed inlet is continuously conveyed. A trough is divided into a conce |
| 5585043 |
Method of coextracting neptunium and plutonium |
December 17, 1996 |
| In a method of coextracting neptunium and plutonium, a nitric acid solution containing a mixture of neptunium and plutonium is oxidized by irradiation of ultraviolet light. As a result, different valences of neptunium are adjusted all into the valence 6, which can remain in water, and in |
| 5580658 |
Copper-carbon composite material with graded function and method for manufacturing the same |
December 3, 1996 |
| A function ally gradient composite material containing copper and carbon as main components and having a predetermined shape, in which the composition ratio of the copper to the carbon in the material continuously varies in at least one predetermined direction. The material is manufactur |
| 5574960 |
Method of separating exothermic elements from high-level radioactive liquid waste |
November 12, 1996 |
| A method of separating exothermic elements of Cs and Sr from a high-level radioactive liquid waste. The method comprises a denitration step wherein formic acid is added to the high-level liquid waste so as to adjust its pH to about 5, thereby causing most of the elements other than Cs an |
| 5564102 |
Glass melting treatment method |
October 8, 1996 |
| An object material to be melted (radioactive liquid waste and glass material) 16 is charged into the interior of a cold-crucible induction melting apparatus 10, and a conductor 18 the melting point of which is higher than that of the glass material is inserted into a melting furnace |
| 5530174 |
Method of vitrifying high-level radioactive liquid waste |
June 25, 1996 |
| A method of vitrifying a high-level radioactive liquid waste comprising removing a precipitate composed mainly of Mo and Zr from the high-level liquid waste, mixing the resulting high-level liquid waste with a raw glass material having a chemical composition wherein the B.sub.2 O.sub.3 |
| 5523515 |
Method of separating and purifying spent solvent generated in nuclear fuel cycle |
June 4, 1996 |
| A method of separating and purifying a spent solvent generated in a nuclear fuel cycle and containing a higher hydrocarbon and a phosphate. This method comprises applying to the spent solvent a pressure high enough for allowing the crystallization of the higher hydrocarbon to thereby |
| 5504765 |
Low-temperature Raman laser apparatus |
April 2, 1996 |
| A low-temperature Raman laser apparatus that avoids an increase in the pump light power, which would otherwise be needed under room temperature conditions, and eliminates the problems of instability of the equipment and complicatedness of the operation under liquid nitrogen cooling c |
| 5503812 |
Method for separating and purifying fission noble metals |
April 2, 1996 |
| Fission noble metals contained in an insoluble residue and/or a high-level radioactive liquid waste generated in the step of reprocessing spent nuclear fuels are dissolved in nitric acid to prepare a palladium-containing nitric acid solution, which is then brought into liquid-liquid |
| 5500192 |
Method of separating neptunium and plutonium |
March 19, 1996 |
| In a method of separating neptunium and plutonium, a nitric acid solution containing a mixture of neptunium and plutonium is oxidized by irradiation of ultraviolet light in the presence of a reducing agent. As a result, different valences of neptunium are adjusted all into the valence 5, |
| 5499276 |
Method for minor actinide nuclides incineration |
March 12, 1996 |
| Neptunium of minor actinide nuclides separated from spent fuel is added to fuel of reactor cores (inner reactor cores and/or outer reactor cores) of a fast reactor and americium of the separated minor actinide nuclides and rare earth elements are added to either or both of radial and axi |
| 5479017 |
Scanning mechanism for radiation TV set |
December 26, 1995 |
| A radiation scanning mechanism is capable of increasing an observable range by eliminating a restriction on a scannable range of a conventional scanning mechanism for a radiation TV set for scanning an observation object by a directional radiation detector to display the distribution |
| 5476641 |
Method of separating and recovering plutonium and neptunium from plutonium- and neptunium-contai |
December 19, 1995 |
| A method of separating and recovering Pu and Np from a Pu- and Np-containing nitric acid solution. The method comprises the steps of subjecting a nitric acid solution containing Pu and Np to valence adjustment by adding a reducing agent consisting of hydroxylamine nitrate and hydrazl |
| 5465849 |
Column and method for separating particles in accordance with their magnetic susceptibility |
November 14, 1995 |
| Particles contained in a suspension are separated in accordance with their magnetic susceptibility and based on the variation in flow velocity of suspension. In order to achieve this magnetic separation, a pair of wall plates having at least one flat surface in which a plurality of f |
| 5463099 |
Extractant for selectively extracting strontium from aqueous solution containing the same |
October 31, 1995 |
| An extractant for selectively extracting strontium from an aqueous solution containing the same, which comprises a 1,2-benzenebis(1,4-dioxanonyl-6,8-dionato)metal complex of the following structural formula: ##STR1## wherein M represents a metal ion of Cu (II), Zn (II) or Ni (II) |
| 5457997 |
Laser ultrasonic detection method and apparatus therefor |
October 17, 1995 |
| A reflector/vibrator plate is irradiated with an ultrasonic generation laser beam to generate an ultrasonic wave therein, and the thus generated ultrasonic wave is transmitted into an object to be inspected. The ultrasonic wave transmitted into the inspection object returns to the re |
| 5446773 |
Fast Reactor Core |
August 29, 1995 |
| The invention provides a heterogeneously loaded type of fast reactor core in which a reduced number of target fuel assemblies containing minor actinide nuclides are heterogeneously dispersed and loaded. A wrapper tube for each of the target fuel assemblies is of the same shape and size a |
| 5437847 |
Method of separating and recovering ruthenium from high-level radioactive liquid waste |
August 1, 1995 |
| A method of recovering volatile ruthenium, which is separated and formed by constant potential electrolysis from high-level radioactive liquid waste discharged from the reprocessing step of spent nuclear fuel by purex process, in the form of stable solid. The method comprises electrolyzi |
| 5410199 |
Vertically carrying superconduction motor |
April 25, 1995 |
| A vertically carrying apparatus comprising a carrying capsule that has a space for accommodating an object which is to be carried, the capsule incorporating a horizontal superconducting coil, and armature coils that are vertically arranged side by side outside the carrying capsule, where |
| 5369655 |
Output control method for laser system |
November 29, 1994 |
| An output control method for a laser system comprised of a laser oscillator and a laser amplifier. The method enables the output energy to be stably controlled over a wide range, without changing the excitation energy, by controlling the delay (.tau.) of the excitation energy application |
| 5357334 |
Spectroanalyzer correcting for deterioration of transmissibility |
October 18, 1994 |
| A spectroanalyzer accurately spectroanalyzes in spite of the deterioration of transmissibility of an optical fiber (5) by radiation, by using a light from a sample cell (1) as a measurement light which passes through the optical fiber (5). The spectroanalyzer comprises a white light sour |
| 5352367 |
Process for the separation of radioactive iodine compounds by precipitation |
October 4, 1994 |
| A process for the separation of radioactive iodine compounds by precipitation is provided. This process comprises adding 0.1 to 3 parts by weight of a reducing agent and an effective amount of silver nitrate to 100 parts by weight of a liquid waste containing radioactive iodine compo |
| 5330710 |
Nickel-base alloy for glass-contracting member used in unenergized state |
July 19, 1994 |
| A nickel-base alloy for a glass-contacting member used in an unenergized state and having a composition comprising by weight 25 to 40% of chromium, 10 to 45% of cobalt, optionally 0.1 to 3.0% of titanium and optionally 0.01 to 0.05% of at least one element selected from among rare earth |
| 5309493 |
Fuel rod for nuclear reactor |
May 3, 1994 |
| A fuel rod for nuclear reactors which contains UO.sub.2 or a mixed-oxide (MOX) of UO.sub.2 and PuO.sub.2 as a nuclear fuel and a combustible reactivity control material e.g., Gd.sub.2 O.sub.3. A plurality of hollow UO.sub.2 or MOX pellets each having a hole along its central axis are |
