Patents by Inventor Yuuji Midorikawa

Yuuji Midorikawa 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).

  • Inhibition of radioactive material deposition in primary coolant structure of nuclear power plant
    Patent number: 5995576
    Abstract: A mixture of metal ions is added to the primary cooling water of a water-cooled nuclear reactor to inhibit deposition of radioactive materials in the cooling water on the inner surfaces of pipes. The mixture of metal ions added to the cooling water introduced into the primary cooling system simultaneously comprises two to four of the metal ions, Mn ion, Mg ion, Ni ion and Zn ion, one of these ions being manganese ion.
    Type: Grant
    Filed: October 9, 1998
    Date of Patent: November 30, 1999
    Assignees: Tohoku Electric Power Co., Ltd., Nuclear Fuel Industries, Ltd.
    Inventors: Yuuji Midorikawa, Yoshiyuki Saitoh, Takeshi Sakai, Teruchika Kikuchi