Patents by Inventor Hirokazu Shoumura

Hirokazu Shoumura 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).

  • Structure and method for bolting neutron reflector
    Patent number: 7873138
    Abstract: A neutron reflector bolt fastening structure is disclosed in which even upon relaxation in the fastening forces thereof being generated in tie rods for divided stage portions as a result of neutron irradiation, it is possible to press the neutron reflector firmly against a core vessel. The neutron reflector bolt fastening structure includes: a neutron reflector which includes of a plurality of divided stage portions and situated in a core vessel in a reactor vessel; a plurality of tie rods for fixing the neutron reflector to the core vessel; and a plurality of bolts for exclusively fixing the lowermost stage portion of the plurality of stage portions of the neutron reflector to the core vessel.
    Type: Grant
    Filed: April 25, 2002
    Date of Patent: January 18, 2011
    Assignee: Mitsubishi Heavy Industries, Ltd.
    Inventors: Makoto Nakajima, Hirokazu Shoumura, Kenji Umeda
  • Structure and Method For Bolting Neutron Reflector
    Publication number: 20080285702
    Abstract: A neutron reflector bolt fastening structure is disclosed in which even upon relaxation in the fastening forces thereof being generated in tie rods for divided stage portions as a result of neutron irradiation, it is possible to press the neutron reflector firmly against a core vessel. The neutron reflector bolt fastening structure includes: a neutron reflector which includes of a plurality of divided stage portions and situated in a core vessel in a reactor vessel; a plurality of tie rods for fixing the neutron reflector to the core vessel; and a plurality of bolts for exclusively fixing the lowermost stage portion of the plurality of stage portions of the neutron reflector to the core vessel.
    Type: Application
    Filed: April 25, 2002
    Publication date: November 20, 2008
    Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.
    Inventors: Makoto Nakajima, Hirokazu Shoumura, Kenji Umeda