Patents by Inventor Joon-hyung Choi

Joon-hyung Choi has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20200027583
    Abstract: Annular metal fuel and fuel rods are described that have improved performance over uranium oxide fuel rods. The annular metal fuel can be made out of porous metal nuclear fuel and will generate more power and operate at a much lower temperature than uranium oxide fuel. The annular metal fuel rods may be used in traveling wave reactors and other fast reactors. Pressurized water reactors may also be retrofit with annular metal fuel rods to improve reactor performance.
    Type: Application
    Filed: December 21, 2018
    Publication date: January 23, 2020
    Applicant: TerraPower, LLC
    Inventors: Joon Hyung Choi, Micah J. Hackett, Pavel Hejzlar, Ryan N. Latta, James M. Vollmer
  • Patent number: 10062458
    Abstract: A method of providing an end-capped tubular ceramic composite for containing nuclear fuel (34) in a nuclear reactor involves the steps of providing a tubular ceramic composite (40), providing at least one end plug (14, 46, 48), applying (42) the at least one end plug material to the ends of the tubular ceramic composite, applying electrodes to the end plug and tubular ceramic composite and applying current in a plasma sintering means (10, 50) to provide a hermetically sealed tube (52). The invention also provides a sealed tube made by this method.
    Type: Grant
    Filed: August 1, 2016
    Date of Patent: August 28, 2018
    Assignee: Westinghouse Electric Company LLC
    Inventors: Peng Xu, Edward J. Lahoda, Lars Hallstadius, Joon Hyung Choi, Shinichi Higuichi, Fumihisa Kano
  • Publication number: 20160358673
    Abstract: A method of providing an end-capped tubular ceramic composite for containing nuclear fuel (34) in a nuclear reactor involves the steps of providing a tubular ceramic composite (40), providing at least one end plug (14, 46, 48), applying (42) the at least one end plug material to the ends of the tubular ceramic composite, applying electrodes to the end plug and tubular ceramic composite and applying current in a plasma sintering means (10, 50) to provide a hermetically sealed tube (52). The invention also provides a sealed tube made by this method.
    Type: Application
    Filed: August 1, 2016
    Publication date: December 8, 2016
    Applicants: WESTINGHOUSE ELECTRIC COMPANY LLC, KABUSHIKI KAISHA TOSHIBA
    Inventors: PENG XU, EDWARD J. LAHODA, LARS HALLSTADIUS, JOON HYUNG CHOI, SHINICHI HIGUICHI, FUMIHISA KANO
  • Patent number: 9455053
    Abstract: A method of providing an end-capped tubular ceramic composite for containing nuclear fuel (34) in a nuclear reactor involves the steps of providing a tubular ceramic composite (40), providing at least one end plug (14, 46, 48), applying (42) the at least one end plug material to the ends of the tubular ceramic composite, applying electrodes to the end plug and tubular ceramic composite and applying current in a plasma sintering means (10, 50) to provide a hermetically sealed tube (52). The invention also provides a sealed tube made by this method.
    Type: Grant
    Filed: September 16, 2013
    Date of Patent: September 27, 2016
    Assignees: Westinghouse Electric Company LLC, KABUSHIKI KAISHA TOSHIBA AKA Toshiba Corporation
    Inventors: Peng Xu, Edward J. Lahoda, Lars Hallstadius, Joon Hyung Choi, Shinichi Higuchi, Fumihisa Kano
  • Publication number: 20150078505
    Abstract: A method of providing an end-capped tubular ceramic composite for containing nuclear fuel (34) in a nuclear reactor involves the steps of providing a tubular ceramic composite (40), providing at least one end plug (14, 46, 48), applying (42) the at least one end plug material to the ends of the tubular ceramic composite, applying electrodes to the end plug and tubular ceramic composite and applying current in a plasma sintering means (10, 50) to provide a hermetically sealed tube (52). The invention also provides a sealed tube made by this method.
    Type: Application
    Filed: September 16, 2013
    Publication date: March 19, 2015
    Applicants: Kabushiki Kaisha /Toshiba, aka Toshiba Corporation, Westinghouse Electric Company LLC
    Inventors: PENG XU, Edward J. Lahoda, Lars Hallstadius, Joon Hyung Choi, Shinichi Higuchi, Fumisha Kano
  • Patent number: 8229055
    Abstract: The present invention relates to a top nozzle for a nuclear fuel assembly that has a two-stage elastic section such that a pushing force against the axial movement of the nuclear fuel assembly under normal conditions is optimized and at the same time a suppressing force against a drastic uplifting force of the nuclear fuel assembly under transient conditions is strengthened, and that lowers the elastic coefficients of the springs operating under normal conditions more than those of existing coil springs, thereby providing an optimal pushing force against the nuclear fuel assembly.
    Type: Grant
    Filed: January 8, 2008
    Date of Patent: July 24, 2012
    Assignee: Korea Nuclear Fuel Co., Ltd.
    Inventors: Joon-kyoo Park, Joon-hyung Choi, Kyu-Tae Kim, Jung-min Suh, Shin-ho Lee, Nam-gyu Park, Kyong-bo Eom, Jin-sun Kim, Jin-seok Lee, Seong-ki Lee
  • Patent number: 7835484
    Abstract: The present invention relates to an anti-fretting wear spacer grid having a plurality of canoe-shaped springs formed thereon, wherein each of the canoe-shaped springs includes: a fuel rod-contacting part having a flat surface having a predetermined longitudinal length so as to have linear contact with the fuel rod; a curved face-connecting part formed on the upper and lower portions of the fuel rod-contacting part; a leg-connecting part formed on the end portion of the curved face-connecting part; and legs each being formed of a plate shape having a predetermined length and connecting the both sides of the leg-connecting part with one unit grid cell surface.
    Type: Grant
    Filed: January 9, 2008
    Date of Patent: November 16, 2010
    Assignee: Korea Nuclear Fuel Co., Ltd
    Inventors: Kyong-bo Eom, Kyu-Tae Kim, Jung-min Suh, Shin-ho Lee, Nam-Gyu Park, Joon-kyoo Park, Jin-sun Kim, Il-kyu Kim, Seong-ki Lee, Joon-hyung Choi
  • Publication number: 20100166134
    Abstract: The present invention relates to a top nozzle having on-off type of hold-down springs for a nuclear fuel assembly that has a two-stage elastic section such that a pushing force against the axial movement of the nuclear fuel assembly under normal conditions is optimized and at the same time a suppressing force against a drastic uplifting force of the nuclear fuel assembly under transient conditions is strengthened, and that lowers the elastic coefficients of the springs operating under normal conditions more than those of existing coil springs, thereby providing an optimal pushing force against the nuclear fuel assembly.
    Type: Application
    Filed: January 8, 2008
    Publication date: July 1, 2010
    Applicant: Korea Nuclear Fuel Co., Ltd.
    Inventors: Joon-kyoo PARK, Joon-hyung Choi, Kyu-Tae Kim, Jung-min Suh, Shin-ho Lee, Nam-gyu Park, Kyong-bo Eom, Jin-sun Kim, Jin-seok Lee, Seong-ki Lee
  • Publication number: 20100098208
    Abstract: The present invention relates to an anti-fretting wear spacer grid having a plurality of canoe-shaped springs formed thereon, wherein each of the canoe-shaped springs includes: a fuel rod-contacting part having a flat surface having a predetermined longitudinal length so as to have linear contact with the fuel rod; a curved face-connecting part formed on the upper and lower portions of the fuel rod-contacting part; a leg-connecting part formed on the end portion of the curved face-connecting part; and legs each being formed of a plate shape having a predetermined length and connecting the both sides of the leg-connecting part with one unit grid cell surface.
    Type: Application
    Filed: January 9, 2008
    Publication date: April 22, 2010
    Applicant: Korea Nuclear Fuel Co., Ltd.
    Inventors: Kyong-bo EOM, Kyu-Tae Kim, Jung-min Suh, Shin-ho Lee, Nam-gyu Park, Joon-kyoo Park, Jin-sun Kim, II-kyu Kim, Seong-ki Lee, Joon-hyung Choi