Patents by Inventor Yuichi Fukaya

Yuichi Fukaya 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).

  • Method of reducing corrosion of nuclear reactor structural material
    Patent number: 8731131
    Abstract: In a method of reducing corrosion of a material constituting a nuclear reactor structure, an electrochemical corrosion potential is controlled by injecting a solution or a suspension containing a substance generating an excitation current by an action of at least one of radiation, light, and heat existing in a nuclear reactor, or a metal or a metallic compound forming the substance generating the excitation current under the condition in the nuclear reactor to allow the substance generating the excitation current to adhere to the surface of the nuclear reactor structural material, and by injecting hydrogen in cooling water of the nuclear reactor while controlling the hydrogen concentration in a feed water.
    Type: Grant
    Filed: September 14, 2012
    Date of Patent: May 20, 2014
    Assignees: Kabushiki Kaisha Toshiba, Ishikawajima-Harima Heavy Industries Co., Ltd., The Tokyo Electric Power Company, Incorporated
    Inventors: Seiji Yamamoto, Tadasu Yotsuyanagi, Nagayoshi Ichikawa, Tetsuo Oosato, Masato Okamura, Junichi Takagi, Kenji Yamazaki, Shunichi Suzuki, Kenro Takamori, Mitsuru Sambongi, Takeshi Shibano, Takashi Hirano, Yuichi Fukaya
  • METHOD OF REDUCING CORROSION OF NUCLEAR REACTOR STRUCTURAL MATERIAL
    Publication number: 20130070888
    Abstract: In a method of reducing corrosion of a material constituting a nuclear reactor structure, an electrochemical corrosion potential is controlled by injecting a solution or a suspension containing a substance generating an excitation current by an action of at least one of radiation, light, and heat existing in a nuclear reactor, or a metal or a metallic compound forming the substance generating the excitation current under the condition in the nuclear reactor to allow the substance generating the excitation current to adhere to the surface of the nuclear reactor structural material, and by injecting hydrogen in cooling water of the nuclear reactor while controlling the hydrogen concentration in a feed water.
    Type: Application
    Filed: September 14, 2012
    Publication date: March 21, 2013
    Applicants: KABUSHIKI KAISHA TOSHIBA, THE TOKYO ELECTRIC POWER COMPANY, INCORPORATED, ISHIKAWAJIMA-HARIMA HEAVY INDUSTRIES CO., LTD.
    Inventors: Seiji YAMAMOTO, Tadasu Yotsuyanagi, Nagayoshi Ichikawa, Tetsuo Oosato, Masato Okamura, Junichi Takagi, Kenji Yamazaki, Shunichi Suzuki, Kenro Takamori, Mitsuru Sambongi, Takeshi Shibano, Takashi Hirano, Yuichi Fukaya
  • Method of reducing corrosion of nuclear reactor structural material
    Patent number: 8295426
    Abstract: In a method of reducing corrosion of a material constituting a nuclear reactor structure, an electrochemical corrosion potential is controlled by injecting a solution or a suspension containing a substance generating an excitation current by an action of at least one of radiation, light, and heat existing in a nuclear reactor, or a metal or a metallic compound forming the substance generating the excitation current under the condition in the nuclear reactor to allow the substance generating the excitation current to adhere to the surface of the nuclear reactor structural material, and by injecting hydrogen in cooling water of the nuclear reactor while controlling the hydrogen concentration in a feed water.
    Type: Grant
    Filed: December 10, 2004
    Date of Patent: October 23, 2012
    Assignees: Kabushiki Kaisha Toshiba, Ishikawajima-Harima Heavy Industries Co., Ltd., The Tokyo Electric Power Company, Incorporated
    Inventors: Seiji Yamamoto, Tadasu Yotsuyanagi, Nagayoshi Ichikawa, Tetsuo Oosato, Masato Okamura, Junichi Takagi, Kenji Yamazaki, Shunichi Suzuki, Kenro Takamori, Mitsuru Sambongi, Takeshi Shibano, Takashi Hirano, Yuichi Fukaya
  • METHOD OF REDUCING CORROSION OF NUCLEAR REACTOR STRUCTURAL MATERIAL
    Publication number: 20120263269
    Abstract: In a method of reducing corrosion of a material constituting a nuclear reactor structure, an electrochemical corrosion potential is controlled by injecting a solution or a suspension containing a substance generating an excitation current by an action of at least one of radiation, light, and heat existing in a nuclear reactor, or a metal or a metallic compound forming the substance generating the excitation current under the condition in the nuclear reactor to allow the substance generating the excitation current to adhere to the surface of the nuclear reactor structural material, and by injecting hydrogen in cooling water of the nuclear reactor while controlling the hydrogen concentration in a feed water.
    Type: Application
    Filed: December 10, 2004
    Publication date: October 18, 2012
    Applicants: Kabushiki Kaisha Toshiba, THE TOKYO ELECTRIC POWER COMPANY, INCORPORATED, Ishikawajima-Harima Heavy Industries Co., Ltd.
    Inventors: Seiji Yamamoto, Tadasu Yotsuyanagi, Nagayoshi Ichikawa, Tetsuo Oosato, Masato Okamura, Junichi Takagi, Kenji Yamazaki, Shunichi Suzuki, Kenro Takamori, Mitsuru Sambongi, Takeshi Shibano, Takashi Hirano, Yuichi Fukaya
  • Method of reducing corrosion of metal material
    Patent number: 7449101
    Abstract: In a method of reducing corrosion of a metal material, a substance such as semiconductor for generating an electric current by thermal excitation is coated or adhered on a metal material surface, to be exposed to a water having a high temperature of 150° C. or more, of a boiler and ducts or pipes, to which hot water heated by the boiler contacts, of a thermal electric power plant or a nuclear reactor structural material or ducts or pipes surrounding the reactor in a nuclear power plant.
    Type: Grant
    Filed: February 5, 2003
    Date of Patent: November 11, 2008
    Assignees: Kabushiki Kaisha Toshiba, The Tokyo Electric Power Company, Incorporated, Ishikawajima - Harima Heavy Industries Co., Ltd.
    Inventors: Masato Okamura, Yukio Henmi, Nagayoshi Ichikawa, Tetsuo Oosato, Seiji Yamamoto, Kazuo Murakami, Kenji Yamazaki, Junichi Takagi, Tadasu Yotsuyanagi, Shunichi Suzuki, Kenro Takamori, Mitsuru Sambongi, Yuichi Fukaya, Takasi Hirano
  • Method of reducing corrosion of metal material
    Publication number: 20030180180
    Abstract: In a method of reducing corrosion of a metal material, a substance such as semiconductor for generating an electric current by thermal excitation is coated or adhered on a metal material surface, to be exposed to a water having a high temperature of 150° C. or more, of a boiler and ducts or pipes, to which hot water heated by the boiler contacts, of a thermal electric power plant or a nuclear reactor structural material or ducts or pipes surrounding the reactor in a nuclear power plant.
    Type: Application
    Filed: February 5, 2003
    Publication date: September 25, 2003
    Applicants: Kabushiki Kaisha Toshiba, The Tokyo Electric Power Co. Inc., Ishikawajima-Harima Heavy Industries Co., Ltd.
    Inventors: Masato Okamura, Yukio Henmi, Nagayoshi Ichikawa, Tetsuo Oosato, Seiji Yamamoto, Kazuo Murakami, Kenji Yamazaki, Junichi Takagi, Tadasu Yotsuyanagi, Shunichi Suzuki, Kenro Takamori, Mitsuru Sambongi, Yuichi Fukaya, Takasi Hirano