Patents by Inventor Hideyuki Hosokawa

Hideyuki Hosokawa 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: 20020021778
    Abstract: In a nuclear power plant, by injecting an amount of hydrogen small enough not to increase a radiation dose rate of the main steam system, ECP of metallic component materials composing a nuclear reactor can be decreased to suppress the potential of occurrence of IGSCC, and the control can be easily performed, and the operating cost can be suppressed to increase. Occurrence of intergranular stress corrosion cracking in metallic component materials in contact with reactor cooling water is suppressed by injecting zirconium hydroxide and hydrogen into the reactor cooling water to decrease the electrochemical corrosion potential of the metallic component materials.
    Type: Application
    Filed: April 23, 2001
    Publication date: February 21, 2002
    Inventors: Yoshiyuki Takamori, Masanori Sakai, Yamato Asakura, Masato Nakamura, Hideyuki Hosokawa, Nagao Suzuki, Kouji Hayashi
  • Patent number: 5715290
    Abstract: In reactor water control for a BWR power plant during an operation cycle after loading new fuel rods in the BWR power plant, an operation is performed which accelerates deposition of crud on the fuel rods until the deposition amount of the crud on the fuel rods reaches a predetermined target value within the operation cycle concerned. After the deposition amount of the crud has reached the predetermined target value, the crud deposition accelerating operation is terminated, whereby even when loading new fuel rods such as Zr liner type fuel rods having a surface on which metal ion deposition has been difficult, radioactivity in the reactor water is efficiently reduced.
    Type: Grant
    Filed: June 14, 1994
    Date of Patent: February 3, 1998
    Assignee: Hitachi, Ltd.
    Inventors: Naohito Uetake, Masayoshi Kondoh, Makoto Nagase, Hideyuki Hosokawa, Teruo Hara, Yamato Asakura, Katsumi Ohsumi, Kazuhiko Akamine, Kouichi Yamane