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| Number | Title | Issue Date |
| 6210497 | Super heat-resisting Mo-based alloy and method of producing same 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 ... | 04/03/2001 |
| 6072495 | Object search method and object search system 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 us... | 06/06/2000 |
| 6067337 | Multiple-sheathed sodium leakage detection apparatus 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... | 05/23/2000 |
| 6020619 | Radioactive rays detection semiconductor device 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... | 02/01/2000 |
| 5965003 | Method of decomposing CMPO 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-... | 10/12/1999 |
| 5896926 | Packer type groundwater sampling system and water sampling method 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 co... | 04/27/1999 |
| 5880426 | Indirectly-cooled plasma jet torch 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 throu... | 03/09/1999 |
| 5869626 | Metal-encapsulated fullerene compound and a method of synthesizing such compound 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 d... | 02/09/1999 |
| 5859436 | Method for determining photonuclear reaction cross section and transforming atomic nucleus A germanium detector measures an energy spectrum of a gamma ray flux. The detector includes a cooling layer continuous over a periphery of the columnar germanium crystal. The cooling layer reduces current leakage induced by heat, so that high energy gamma... | 01/12/1999 |
| 5838843 | Multipurpose optical sensor 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 ... | 11/17/1998 |
| 5834867 | Electromagnetic rotary vibrator and damper 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... | 11/10/1998 |
| 5826203 | Method for solidifying waste containing radioactive iodine 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 ... | 10/20/1998 |
| 5767400 | Hydraulic test system mounted with borehole television set for simultaneous observation in front and lateral directions 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 equi... | 06/16/1998 |
| 5753177 | High-Ni austenitic stainless steel having excellent high-temperature strength 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 i... | 05/19/1998 |
| 5740216 | Vertical seismic isolation structure of common deck system for nuclear reactor components 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 ... | 04/14/1998 |
| 5732983 | Thermal expansion-absorbing structure for pipe arrangement 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... | 03/31/1998 |
| 5717141 | Method and apparatus for evaluating vibrations of a rotary body while maintaining the rotary body in a static or non-rotational state 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. Thi... | 02/10/1998 |
| 5717076 | Metal-encapsulated fullerene derivative compound of and method for making the derivative 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 met... | 02/10/1998 |
| 5712484 | Germanium detector A germanium detector measures an energy spectrum of gamma ray flux. The detector includes a copper cooling layer continuous over a periphery of the columnar germanium crystal. The cooling layer reduces current leakage induced by heat, so that high energy ... | 01/27/1998 |
| 5708958 | Method of separating trivalent actinides and rare earth elements 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 s... | 01/13/1998 |
| 5699284 | Thermal design method for structures and optimum numerical calculation devices for such designs 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 l... | 12/16/1997 |
| 5678167 | Method for dissolving nuclear fuels 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 nucl... | 10/14/1997 |
| 5650051 | Hydrogen generating method using gamma rays 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 react... | 07/22/1997 |
| 5640710 | Method for melt-decontaminating metal contaminated with radioactive substance A flux for effectively melt-decontaminating a zircaloy contaminated with a radioactive contaminant Pu2 O3 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 plu... | 06/17/1997 |
| 5638414 | Method for detecting failure of nuclear reactor fuel 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... | 06/10/1997 |
| 5629965 | Diving bell type control rod equipped with sodium inflow port 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 B4 C pellets and disposed in a cladding tube, an intermediate plug disposed above the pel... | 05/13/1997 |
| 5617691 | Fitting structure of rectangular parallelopipedal blocks 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 sym... | 04/08/1997 |
| 5589140 | Continuous denitration apparatus 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.... | 12/31/1996 |
| 5585043 | Method of coextracting neptunium and plutonium 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, ... | 12/17/1996 |
| 5580658 | Copper-carbon composite material with graded function and method for manufacturing the same 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 dire... | 12/03/1996 |
| 5574960 | Method of separating exothermic elements from high-level radioactive liquid waste 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... | 11/12/1996 |
| 5564102 | Glass melting treatment method 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 ins... | 10/08/1996 |
| 5530174 | Method of vitrifying high-level radioactive liquid waste 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 composit... | 06/25/1996 |
| 5523515 | Method of separating and purifying spent solvent generated in nuclear fuel cycle 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 ... | 06/04/1996 |
| 5503812 | Method for separating and purifying fission noble metals 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 the... | 04/02/1996 |
| 5504765 | Low-temperature Raman laser apparatus 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 un... | 04/02/1996 |
| 5500192 | Method of separating neptunium and plutonium 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... | 03/19/1996 |
| 5499276 | Method for minor actinide nuclides incineration 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... | 03/12/1996 |
| 5479017 | Scanning mechanism for radiation TV set 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 detecto... | 12/26/1995 |
| 5476641 | Method of separating and recovering plutonium and neptunium from plutonium- and neptunium-containing nitric acid solution 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 hydr... | 12/19/1995 |
