Patents by Inventor Norimasa Mitsutsuka

Norimasa Mitsutsuka 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 for removing a radioactive substance from a molten metal
    Patent number: 4488964
    Abstract: An apparatus for removing a radioactive substance from a molten metal which comprises a cold trap for crystallizing an impurity out of the molten metal; a radioactive substance-adsorbing unit which communicates with the cold trap and in which a radioactive substance-adsorbing material is filled with a specific surface area of at least 10 cm.sup.2 /cm.sup.3 to eliminate a radioactive substance from the impurity; means for heating the molten metal conducted from the cold trap to the radioactive substance-adsorbing unit; and means for controlling the temperature of the heating means by measuring the temperature of the cold trap and radioactive substance-adsorbing unit.
    Type: Grant
    Filed: September 25, 1978
    Date of Patent: December 18, 1984
    Assignee: Tokyo Shibaura Denki Kabushiki Kaisha
    Inventor: Norimasa Mitsutsuka
  • System for detecting the failure of a nuclear fuel rod in a nuclear reactor
    Patent number: 4135970
    Abstract: A system for detecting the failure of a nuclear fuel rod in a nuclear reactor comprises sampling a coolant in a nuclear reactor, cooling the sampled coolant to permit 135.sub.I in the coolant to be adsorbed on an iodine adsorption device, moving 135m.sub.Xe produced by the 135.sub.I decay into a cover gas at the upper space of a gas-liquid separator, and introducing the 135m.sub.Xe entrained cover gas into a radioactivity detector where the radioactivity of 135m.sub.Xe is counted.
    Type: Grant
    Filed: February 28, 1977
    Date of Patent: January 23, 1979
    Assignee: Tokyo Shibaura Electric Co., Ltd.
    Inventors: Norimasa Mitsutsuka, Katsumi Kubo, Tatsuo Miyazawa