Patents by Inventor Keiji Matsunaga

Keiji Matsunaga 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).

  • APPARATUS AND METHOD FOR REINFORCING PIPING ARRANGEMENT OF REACTOR CORE SPRAY SYSTEM
    Publication number: 20120087456
    Abstract: A reinforcing device includes a clamp that is disposed on an outer side of a welded portion of a core spray system piping and holds the core spray system piping at axially symmetrical points on an outer surface thereof, the piping being located on opposite sides of a weld line of the welded portion and also includes a bolt that is provided on the clamp so as to serve as a mechanical fastening mechanism applying a compressive force to the welded portion from the outside of the core spray system piping.
    Type: Application
    Filed: December 16, 2011
    Publication date: April 12, 2012
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Naotaka Suganuma, Masakazu Abura, Kazuo Sudo, Satoshi Sato, Haruhiko Hata, Yukiaki Hidaka, Keiji Matsunaga, Kanemi Hirose
  • APPARATUS AND METHOD FOR REINFORCING PIPING ARRANGEMENT OF REACTOR CORE SPRAY SYSTEM
    Publication number: 20110101177
    Abstract: A reinforcing device includes a clamp that is disposed on an outer side of a welded portion of a core spray system piping and holds the core spray system piping at axially symmetrical points on an outer surface thereof, the piping being located on opposite sides of a weld line of the welded portion and also includes a bolt that is provided on the clamp so as to serve as a mechanical fastening mechanism applying a compressive force to the welded portion from the outside of the core spray system piping.
    Type: Application
    Filed: April 22, 2009
    Publication date: May 5, 2011
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Naotaka Suganuma, Masakazu Abura, Kazuo Sudo, Satoshi Sato, Haruhiko Hata, Yukiaki Hidaka, Keiji Matsunaga, Kanemi Hirose
  • FUEL SUPPORTING ATTACHMENT AND FUEL INLET MECHANISM
    Publication number: 20080130820
    Abstract: A fuel inlet mechanism to introduce a coolant into a fuel assembly configured to be charged in a light water nuclear reactor, includes, a filter catching a foreign substance included in the coolant on an upstream side of the fuel assembly, the filter having a plurality of through holes to pass the coolant, and the through holes having an inlet portion, an outlet portion and at least one bent portion to a degree by which the outlet portion cannot be seen through from the inlet portion by a straight line.
    Type: Application
    Filed: September 10, 2007
    Publication date: June 5, 2008
    Inventors: Masaru UKAI, Kosaku Tsumita, Ryoma Kato, Kenjiro Fukamichi, Yuji Yamada, Makoto Sato, Tadaaki Shimazu, Tomoharu Tanabe, Hirotoshi Matsumura, Keiji Matsunaga, Ken Okuda
  • Fuel supporting attachment and fuel inlet mechanism
    Publication number: 20050276367
    Abstract: A fuel inlet mechanism to introduce a coolant into a fuel assembly configured to be charged in a light water nuclear reactor, includes, a filter catching a foreign substance included in the coolant on an upstream side of the fuel assembly, the filter having a plurality of through holes to pass the coolant, and the through holes having an inlet portion, an outlet portion and at least one bent portion to a degree by which the outlet portion cannot be seen through from the inlet portion by a straight line.
    Type: Application
    Filed: August 22, 2005
    Publication date: December 15, 2005
    Inventors: Masaru Ukai, Kosaku Tsumita, Ryoma Kato, Kenjiro Fukamichi, Yuji Yamada, Makoto Sato, Tadaaki Shimazu, Tomoharu Tanabe, Hirotoshi Matsumura, Keiji Matsunaga, Ken Okuda
  • Fuel supporting attachment and fuel inlet mechanism
    Publication number: 20030026381
    Abstract: A fuel inlet mechanism to introduce a coolant into a fuel assembly configured to be charged in a light water nuclear reactor, includes, a filter catching a foreign substance included in the coolant on an upstream side of the fuel assembly, the filter having a plurality of through holes to pass the coolant, and the through holes having an inlet portion, an outlet portion and at least one bent portion to a degree by which the outlet portion cannot be seen through from the inlet portion by a straight line.
    Type: Application
    Filed: July 15, 2002
    Publication date: February 6, 2003
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Masaru Ukai, Kosaku Tsumita, Ryoma Kato, Kenjiro Fukamichi, Yuji Yamada, Makoto Sato, Tadaaki Shimazu, Tomoharu Tanabe, Hirotoshi Matsumura, Keiji Matsunaga, Ken Okuda