Patents Assigned to Japan Atomic Energy Agency
  • Publication number: 20130217135
    Abstract: Disclosed is a compound suitable for use as a fluorescent probe for the detection of uranium. The compound enables the qualitative and quantitative analysis of uranium present in waste samples using less expensive apparatuses. The compound of the present invention has the structure shown by the following formula.
    Type: Application
    Filed: January 24, 2013
    Publication date: August 22, 2013
    Applicant: JAPAN ATOMIC ENERGY AGENCY
    Inventor: JAPAN ATOMIC ENERGY AGENCY
  • Patent number: 8481719
    Abstract: After adding water to the carboxymethyl carrageenan which is raw material and mixing them well, the ionizing radiation of more than fixed dose is irradiated to the obtained paste sample of fixed concentration. As a result, an excellent hydrogel in heat resistance which does not dissolve at 50° C. or more can be obtained. The manufactured gel can be used for many kinds of products. Because this gel has a biodegradation characteristic, it is possible to dispose by composting.
    Type: Grant
    Filed: August 23, 2010
    Date of Patent: July 9, 2013
    Assignee: Japan Atomic Energy Agency
    Inventors: Toshiaki Yagi, Naotsugu Nagasawa, Akihiro Hiroki, Masao Tamada, Charito T. Aranilla
  • Patent number: 8481718
    Abstract: A gel manufactured by irradiating ionizing radiation in the range of 5-1000 kGy to an obtained paste compound of a density of 10% by weight or more after adding water to carboxymethyl carrageenan and wherein each gram of dry gel obtained is capable of absorbing 20 grams or more of water. The ionizing radiation may be gamma rays, electron beams or X-rays.
    Type: Grant
    Filed: December 4, 2007
    Date of Patent: July 9, 2013
    Assignee: Japan Atomic Energy Agency
    Inventors: Toshiaki Yagi, Naotsugu Nagasawa, Akihiro Hiroki, Masao Tamada, Charito T. Aranilla
  • Patent number: 8476188
    Abstract: A renewable adsorbent enabling to adsorb cesium selectively and efficiently, and to reuse cesium by eluting adsorbed cesium, and its manufacturing method are provided. Polyethylene (PE)/polypropylene (PP) based non-woven fabric may be exposed with electron beam, PE/PP based non-woven fabric to which electron beam was exposed is contacted to the monomer solution containing acrylonitrile (AN), dimethyl sulfoxide (DMSO), Tween80 (polyoxyethylene sorbitan monooleate) as a surfactant, and AMP (ammonium molybdophosphate n-hydrate) as an inorganic ion exchanger, and then the inorganic ion exchanger (AMP) is supported directly by the non-ionic graft chain.
    Type: Grant
    Filed: June 4, 2012
    Date of Patent: July 2, 2013
    Assignee: Japan Atomic Energy Agency
    Inventors: Akio Iwanade, Noriaki Seko, Hiroyuki Hoshina, Yuji Ueki, Seiichi Saiki
  • Patent number: 8470895
    Abstract: A method of producing an electrolyte membrane for use in a fuel cell, including: performing radiation-induced graft polymerization of a vinyl monomer having a nucleophilic functional group selected from an acylvinyl ether derivative, a styrene derivative, and a methacrylic acid derivative, with a polymer substrate having a fluorine-containing polymer, an olefin-containing polymer, or an aromatic polymer; deprotecting an ester bond of a graft chain on the polymer substrate introduced by the radiation-induced graft polymerization; and introducing an alkylethersulfonic acid structure into the nucleophilic functional group of the graft chain thus deprotected, by use of an electrophilic reagent selected from cyclic sulfonic acid ester and alkylhalide sulfonate.
    Type: Grant
    Filed: January 26, 2010
    Date of Patent: June 25, 2013
    Assignees: Japan Atomic Energy Agency, Kanagawa University
    Inventors: Yasunari Maekawa, Kazuyuki Enomoto, Nobuhiro Kihara
  • Publication number: 20130156389
    Abstract: Disclosed is a composite optical fiber which has high flexibility and is hard to break. The composite optical fiber comprises a larger-diameter optical fiber and smaller-diameter optical fibers each having a smaller diameter than that of the larger-diameter optical fiber, wherein the larger-diameter fiber and the smaller-diameter optical fibers are so arranged that the larger-diameter fiber is surrounded by the smaller-diameter optical fibers, and the smaller-diameter optical fibers that surround the larger-diameter optical fiber are made from a plastic material.
    Type: Application
    Filed: June 6, 2011
    Publication date: June 20, 2013
    Applicants: Japan Atomic Energy Agency, Kuraray Co., Ltd.
    Inventors: Osamu Shinji, Katashi Saito, Kiyoshi Oka
  • Publication number: 20130158961
    Abstract: A calculation apparatus comprising: an acquiring unit to acquire an azimuth and an ellipticity angle of a polarization plane of a laser beam passing through a plasma; and a calculation unit to calculate at least one of a magnetic field profile, an electron density profile and an electron temperature profile in the plasma on the basis of the azimuth and the ellipticity angle.
    Type: Application
    Filed: December 14, 2012
    Publication date: June 20, 2013
    Applicant: JAPAN ATOMIC ENERGY AGENCY
    Inventor: Japan Atomic Energy Agency
  • Publication number: 20130136221
    Abstract: To provide a method of producing radioactive molybdenum solution suitable for extracting 99mTc to be used as radioactive diagnostic drug by way of establishing a production process for high-density MoO3 pellets with a lower amount of insoluble content when dissolving the pellets. The method has the steps of: preparing MoO3 powder, fabricating a MoO3 pellet by filling said MoO3 powder in a heated die and sintering in an air, oxidizing said MoO3 pellet, producing neutron-irradiated MoO3 pellets by irradiating a neutron on said oxidized MoO3 pellet, and obtaining radioactive molybdenum solution by dissolving said neutron-irradiated MoO3 pellet.
    Type: Application
    Filed: November 13, 2012
    Publication date: May 30, 2013
    Applicant: JAPAN ATOMIC ENERGY AGENCY
    Inventor: JAPAN ATOMIC ENERGY AGENCY
  • Patent number: 8445404
    Abstract: A method of forming a zirconium-loaded fibrous adsorbent material having phosphoryl groups, the method including: grafting a reactive monomer having phosphoryl groups onto a polymeric substrate; and loading zirconium such that the zirconium-loaded fibrous adsorbent material has a zirconium content in an amount of 4.0 or 4.2 mmol/g.
    Type: Grant
    Filed: August 23, 2010
    Date of Patent: May 21, 2013
    Assignee: Japan Atomic Energy Agency
    Inventors: Noriaki Seko, Masao Tamada
  • Publication number: 20130123534
    Abstract: A rare earth metal extractant containing, as the extractant component, dialkyldiglycol amide acid which is excellent in breaking down light rare earth elements is reacted in diglycolic acid (X mol) and an esterification agent (Y mol) at a reaction temperature of 70° C. or more and for a reaction time of one hour or more such that the mol ratio of Y/X is 2.5 or more, and is subjected to vacuum concentration. Subsequently, a reaction intermediate product is obtained by removing unreacted products and reaction residue. Then a nonpolar or low-polar solvent which is an organic solvent for forming an organic phase during solvent extraction of the rare earth metal and which is capable of dissolving dialkyldiglycol amide acid is added as the reaction solvent, and the reaction intermediate product is reacted with dialkyl amine (Z mol) such that the mol ratio of Z/X is 0.9 or more.
    Type: Application
    Filed: July 1, 2011
    Publication date: May 16, 2013
    Applicants: JAPAN ATOMIC ENERGY AGENCY, SHIN-ETSU CHEMICAL CO., LTD.
    Inventors: Kazuaki Sakaki, Hiroto Sugahara, Tetsuya Kume, Masaki Ohashi, Hirochika Naganawa, Kojiro Shimojo
  • Publication number: 20130115543
    Abstract: The present invention relates to a thermostable polymer electrolyte membrane which comprises a main chain comprising an alicyclic polybenzimidazole and a graft chain added to the main chain by radiation-induced graft polymerization, wherein at least a part of the graft chain has sulfonic acid groups. The thermostable polymer electrolyte membrane of the invention is used for many apparatuses such as polymer electrolyte fuel cells or water electrolysis devices, in which the electrolyte membrane exhibits high proton conductivity, low fuel permeability, high oxidation resistance and superior mechanical property under operation conditions at high temperature. The present invention also provides a simple and low-cost process for producing the same.
    Type: Application
    Filed: May 10, 2012
    Publication date: May 9, 2013
    Applicants: JAPAN ATOMIC ENERGY AGENCY, THE UNIVERSITY OF TOKYO
    Inventors: Kazuaki Kudo, Toshio Takayama, June Park, Masaharu Asano, Yasunari Maekawa
  • Publication number: 20130107708
    Abstract: To reduce or prevent effect of deterioration of communication quality caused from packet loss in a packet communication, a plurality of PDAs are installed at first and second terminal equipments, and a packet communication is performed using one PDA in such plurality of PDAs. If the packet loss of received data in such packet communication is detected declining to the predetermined value, a request is sent using another PDA to the first terminal equipment for transmitting the same data that above-stated one PDA is handling and the data transmitted at the request is received. On reception of the data at the request, sizes of the packet loss rate of received data with above-stated one PDA and of the packet loss rate of received data with above-stated another PDA are compared and the packet communication is continued selecting a system of which packet loss rate is smaller.
    Type: Application
    Filed: September 11, 2012
    Publication date: May 2, 2013
    Applicant: JAPAN ATOMIC ENERGY AGENCY
    Inventor: Yuzo Yamamoto
  • Publication number: 20130102806
    Abstract: A rare earth metal extractant containing, as the extractant component, dialkyldiglycol amide acid which is excellent in breaking down light rare earth elements is reacted in diglycolic acid (X mol) and an esterification agent (Y mol) at a reaction temperature of 70° C. or more and for a reaction time of one hour or more such that the mol ratio of Y/X is 2.5 or more, and is subjected to vacuum concentration. Subsequently, a reaction intermediate product is obtained by removing unreacted products and reaction residue, and an aprotic polar solvent is added as the reaction solvent. Then, the reaction intermediate product is reacted with dialkyl amine (Z mol) such that the mol ratio of Z/X is 0.9 or more and the aprotic polar solvent is removed. As a consequence, a rare earth metal extractant is efficiently synthesized at a low cost and at a high yield without having to use expensive diglycolic acid anhydride and harmful dichloromethane.
    Type: Application
    Filed: July 1, 2011
    Publication date: April 25, 2013
    Applicants: JAPAN ATOMIC ENERGY AGENCY, SHIN-ETSU CHEMICAL CO., LTD.
    Inventors: Kazuaki Sakaki, Hiroto Sugahara, Tetsuya Kume, Masaki Ohashi, Hirochika Naganawa, Kojiro Shimojo
  • Patent number: 8421278
    Abstract: In order to actualize a power feeding control apparatus and a charging system that are capable of efficiently charging plural storage batteries using a load-capacity controlled power source, the power feeding control apparatus 1 is configured so that a changeover control of the feeding of the alternating-current voltage to each charger will be performed monitoring the magnitude of the alternating current flowing in each of the plural chargers 4 to 6, therewith, the power feeding control apparatus performs the feeding changeover control comprising the steps of: feeding only to a predetermined one particular charger at the early stage of the start of charging, in which stage a large charging current flows into a storage battery; monitoring inflow current of the predetermined one particular charger; and switching power feeding to another charger to start feeding thereto when the inflow current reduces to the charging saturation current (a current still flowing even at the fully charged state).
    Type: Grant
    Filed: June 30, 2009
    Date of Patent: April 16, 2013
    Assignees: Japan Atomic Energy Agency, Hitachi Industrial Equipment Systems Co., Ltd.
    Inventors: Yuzo Yamamoto, Kiichiro Uno, Hideyuki Higo, Mitsuo Ikeda
  • Publication number: 20130079504
    Abstract: A mixture of a raw material poorly water-soluble polysaccharide or derivative thereof in an ionic liquid-containing solvent is exposed to radiation. Accordingly, a polysaccharide gel producing process is provided that can produce a gel without performing a special pretreatment for the raw material.
    Type: Application
    Filed: September 25, 2012
    Publication date: March 28, 2013
    Applicant: JAPAN ATOMIC ENERGY AGENCY
    Inventor: JAPAN ATOMIC ENERGY AGENCY
  • Patent number: 8391324
    Abstract: An intense optical high field generator capable of generating an intensive optical high field includes an optical amplification medium that converts optical energy for a wide band or plural bands and performs optical energy conversion into oscillating light oscillated from an optical resonator. The generator also includes: a negative dispersion element that imparts negative dispersion to a pulse light, which is the oscillating light; a mode locking unit that mode locks the optical resonator; a positive dispersion element that imparts positive dispersion on the pulse light; an optical system; and a vacuum chamber that accommodates the negative dispersion element, the mode locking unit, and the positive dispersion element 4, such that an intensive optical high field generating point takes in the pulse light from the negative dispersion element or the positive dispersion element and is formed within the vacuum chamber.
    Type: Grant
    Filed: January 14, 2010
    Date of Patent: March 5, 2013
    Assignee: Japan Atomic Energy Agency
    Inventors: Kiminori Kondo, Masaki Kando, Akira Sugiyama
  • Publication number: 20130036871
    Abstract: A method of producing high concentrated 99mTc solution has the steps of dissolving 99MoO3 pellet with alkali solution; extracting 99mTc from the dissolved solution with ketone type organic solvent; separating an ketone type organic phase containing 99mTc and an aqueous phase; adsorbing and concentrating the separated ketone type organic phase containing 99mTc after removing impurities, through a basic alumina column for impurity removal and an acidic alumina column for adsorption and concentration connected continuously; and eluting 99mTc from the acidic alumina column to which 99mTc is adsorbed by physiological saline, wherein the alkali solution is 6M-NaOH solution or 6M-KOH solution.
    Type: Application
    Filed: August 7, 2012
    Publication date: February 14, 2013
    Applicant: JAPAN ATOMIC ENERGY AGENCY
    Inventors: Akihiro KIMURA, Kaori NISHIKATA, Kunihiko TSUCHIYA, Masahiro ISHIHARA, Masakazu TANASE, Saburoh FUJISAKI, Akio OHTA
  • Patent number: 8372558
    Abstract: A vinyl monomer is graft polymerized on an aromatic hydrocarbon-based polymer film substrate to introduce graft chains into the substrate and thereafter a functional monomer represented by the following formula and having sulfonic acid groups or functional groups capable of conversion to sulfonic acid groups is graft polymerized to introduce the sulfonic acid groups or the functional groups capable of conversion to sulfonic acid groups: where R is an aromatic ring or an aliphatic chain; X is (1) —OH, (2) —OLi, —ONa or —OK, (3) —F or —Cl, or (4) —OCnH2n+1 where n is an integer of 1 to 7. Since the graft chains obtained by graft polymerization of the vinyl monomer can also be utilized as scaffold polymers, the graft polymerizability of the functional monomer to the aromatic hydrocarbon-based polymer film substrate is sufficiently improved to enable the preparation of a polymer electrolyte membrane that excels not only in proton conductivity and mechanical strength but also in dimensional stability.
    Type: Grant
    Filed: August 22, 2008
    Date of Patent: February 12, 2013
    Assignee: Japan Atomic Energy Agency
    Inventors: Jinhua Chen, Yasunari Maekawa, Masaharu Asano, Masaru Yoshida
  • Patent number: 8360139
    Abstract: A ceramic heat exchanger includes a heat exchange section that heat-exchanges between two fluids A and B flowing opposite directions to each other. The heat exchange section includes ceramic blocks stacked one on top of another with a seal therebetween. The ceramic blocks have a plurality of parallel lines of flow channels, each line defined by the flow channels through which the same fluid flows, any two adjacent lines being defined by the flow channels through which the different fluids A and B flow respectively. Both ends in the stacking direction of the stack are bound to join and integrate the ceramic blocks with tightening means including end plates and a tie rod. A thermal expansion absorber is disposed on an external surface of the end plates for absorbing thermal expansion in the axial direction of the tie rod.
    Type: Grant
    Filed: May 12, 2006
    Date of Patent: January 29, 2013
    Assignees: Kabushiki Kaisha Toshiba, Japan Atomic Energy Agency
    Inventors: Takanari Inatomi, Yasuhiro Sakai, Shigeki Maruyama, Shoko Suyama, Ryutaro Hino, Atsuhiko Terada, Kaoru Onuki, Shinji Kubo, Seiji Kasahara
  • Publication number: 20120329637
    Abstract: A renewable adsorbent enabling to adsorb cesium selectively and efficiently, and to reuse cesium by eluting adsorbed cesium, and its manufacturing method are provided. Polyethylene (PE)/polypropylene (PP) based non-woven fabric may be exposed with electron beam, PE/PP based non-woven fabric to which electron beam was exposed is contacted to the monomer solution containing acrylonitrile (AN), dimethyl sulfoxide (DMSO), Tween80 (polyoxyethylene sorbitan monooleate) as a surfactant, and AMP (ammonium molybdophosphate n-hydrate) as an inorganic ion exchanger, and then the inorganic ion exchanger (AMP) is supported directly by the non-ionic graft chain.
    Type: Application
    Filed: June 4, 2012
    Publication date: December 27, 2012
    Applicant: JAPAN ATOMIC ENERGY AGENCY
    Inventors: Akio IWANADE, Noriaki SEKO, Hiroyuki HOSHINA, Yuji UEKI, Seiichi SAIKI