Patents by Inventor Yasunori Ohoka

Yasunori Ohoka 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).

  • Doppler reactivity coefficient measuring method
    Patent number: 8462909
    Abstract: The output of a nuclear reactor is increased by a predetermined magnitude, and the neutron beam is measured as time-series data. The temperature of the moderator in the reactor is acquired as time-series data. Time-series data on the reactivity is acquired from the time-series data on the neutron beam by the reverse dynamic characteristic method with respect to a one-point reactor kinetics equation. Time-series data on the fuel temperature of a predetermined average acquired by using the time-series data on the reactor output and a predetermined dynamic characteristic model is acquired. The reactivity feedback contribution component is determined by using the time-series data on the reactivity and the applied reactivity.
    Type: Grant
    Filed: January 27, 2010
    Date of Patent: June 11, 2013
    Assignee: Nuclear Fuel Industries, Limited
    Inventors: Masatoshi Yamasaki, Yasushi Hanayama, Yasunori Ohoka, Masashi Tsuji, Yoichiro Shimazu
  • DOPPLER REACTIVITY COEFFICIENT MEASURING METHOD
    Publication number: 20100128832
    Abstract: The output of a nuclear reactor is increased by a predetermined magnitude, and the neutron beam is measured as time-series data. The temperature of the moderator in the reactor is acquired as time-series data. Time-series data on the reactivity is acquired from the time-series data on the neutron beam by the reverse dynamic characteristic method with respect to a one-point reactor kinetics equation. Time-series data on the fuel temperature of a predetermined average acquired by using the time-series data on the reactor output and a predetermined dynamic characteristic model is acquired. The reactivity feedback contribution component is determined by using the time-series data on the reactivity and the applied reactivity.
    Type: Application
    Filed: January 27, 2010
    Publication date: May 27, 2010
    Applicant: Nuclear Fuel Industries, Limited
    Inventors: Masatoshi YAMASAKI, Yasushi Hanayama, Yasunori Ohoka, Masashi Tsuji, Yoichiro Shimazu