Patents Assigned to Nuclear Development Corporation
  • Production method for a nuclear fuel assembly support grid and a nuclear fuel assembly support grid produced by the same
    Patent number: 6909766
    Abstract: One object of the present invention is to provide a production method for a nuclear fuel assembly support grid that improves the corrosion resistance of welded parts without impairing the characteristics of the support grid so as to be able adequately withstand highly efficient operation. In order to achieve the object, the present invention provide a production method for a nuclear fuel assembly support grid comprising the steps of: assembling a plurality of straps in a grid form; welding intersections of each strap; and carrying out annealing thereafter to precipitate an intermetallic compound on the welded parts.
    Type: Grant
    Filed: November 5, 2002
    Date of Patent: June 21, 2005
    Assignees: Mitsubishi Nuclear Fuel Co., Ltd., Mitsubishi Heavy Industries, Ltd., Nuclear Development Corporation
    Inventors: Toshiya Kido, Kimio Nakayama, Yasunao Yamaguchi
  • Method for efficient laser isotope separation and enrichment of silicon
    Patent number: 6800827
    Abstract: A method for laser-assisted separation and enrichment of silicon isotopes such as 28Si, 29Si and 30Si on the basis of infrared multiple-photon dissociation of silicon halides represented by Si2F6, wherein the silicon halides are irradiated synchronously with multiple infrared pulsed laser beams at different wavelengths.
    Type: Grant
    Filed: August 7, 2002
    Date of Patent: October 5, 2004
    Assignees: Japan Atomic Energy Research Institute, Nuclear Development Corporation
    Inventors: Atsushi Yokoyama, Hironori Ohba, Masashi Hashimoto, Takemasa Shibata, Shigeyoshi Arai, Takeshi Ishii, Akio Ohya
  • PRODUCTION METHOD FOR A NUCLEAR FUEL ASSEMBLY SUPPORT GRID AND A NUCLEAR FUEL ASSEMBLY SUPPORT GRID PRODUCED BY THE SAME
    Publication number: 20040076256
    Abstract: One object of the present invention is to provide a production method for a nuclear fuel assembly support grid that improves the corrosion resistance of welded parts without impairing the characteristics of the support grid so as to be able adequately withstand highly efficient operation. In order to achieve the object, the present invention provide a production method for a nuclear fuel assembly support grid comprising the steps of: assembling a plurality of straps in a grid form; welding intersections of each strap; and carrying out annealing thereafter to precipitate an intermetallic compound on the welded parts.
    Type: Application
    Filed: November 5, 2002
    Publication date: April 22, 2004
    Applicants: MITSUBISHI NUCLEAR FUEL CO., LTD., MITSUBISHI HEAVY INDUSTRIES, LTD., NUCLEAR DEVELOPMENT CORPORATION
    Inventors: Toshiya Kido, Kimio Nakayama, Yasunao Yamaguchi