Patents by Inventor Masato Okamura
Masato Okamura 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).
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Publication number: 20140170325Abstract: A corrosion-resistant member has a composite titanium oxide film for reducing corrosion deposited on a surface of a construction material, where the composite titanium oxide film is represented by a molecular formula MTiO3 in which M is a transition element, and the corrosion-resistant member is preliminarily manufactured by depositing titanium oxide on the surface of the construction material, and the titanium oxide is subsequently or simultaneously subjected to high temperature treatment under existence of an ion of the transition metal.Type: ApplicationFiled: January 29, 2014Publication date: June 19, 2014Applicant: KABUSHIKI KAISHA TOSHIBAInventors: Masato OKAMURA, Osamu Shibasaki, Seiji Yamamoto, Toyoaki Miyazaki
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Patent number: 8731131Abstract: 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: GrantFiled: September 14, 2012Date of Patent: May 20, 2014Assignees: Kabushiki Kaisha Toshiba, Ishikawajima-Harima Heavy Industries Co., Ltd., The Tokyo Electric Power Company, IncorporatedInventors: 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
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Patent number: 8731132Abstract: In a nuclear power plant, a corrosion-resistant oxide film on a surface of the metal component of a reactor structure is exposed to a high-temperature water, the corrosion-resistant oxide film containing an oxide having a property of a P-type semiconductor, and a catalytic substance having a property of an N-type semiconductor is deposited on the oxide film. The oxide film maintains the property of the P-type semiconductor.Type: GrantFiled: January 31, 2012Date of Patent: May 20, 2014Assignees: Kabushiki Kaisha Toshiba, The Tokyo Electric Power Company, IncorporatedInventors: Masato Okamura, Tetsuo Oosato, Seiji Yamamoto, Tadasu Yotsuyanagi, Nagayoshi Ichikawa, Kenji Yamazaki, Junichi Takagi, Hidehiro Urata, Shunichi Suzuki, Kenro Takamori, Junichi Suzuki
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Patent number: 8681925Abstract: In a nuclear power plant, a corrosion-resistant oxide film on a surface of the metal component of a reactor structure is exposed to a high-temperature water, the corrosion-resistant oxide film containing an oxide having a property of a P-type semiconductor, and a catalytic substance having a property of an N-type semiconductor is deposited on the oxide film. The oxide film maintains the property of the P-type semiconductor.Type: GrantFiled: January 31, 2012Date of Patent: March 25, 2014Assignees: Kabushiki Kaisha Toshiba, The Tokyo Electric Power Company, IncorporatedInventors: Masato Okamura, Tetsuo Oosato, Seiji Yamamoto, Tadasu Yotsuyanagi, Nagayoshi Ichikawa, Kenji Yamazaki, Junichi Takagi, Hidehiro Urata, Shunichi Suzuki, Kenro Takamori, Junichi Suzuki
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Publication number: 20130182814Abstract: In a plant including a system which is provided with a steam generator 2, a turbine 3, 5, a condenser 6 and a heater 7 and in which non-deaerated water circulates, and a pipe, the steam generator 2, the heater 7 and 8 of the system which comes into contact with the non-deaerated water is deposited with a protective substance.Type: ApplicationFiled: July 26, 2011Publication date: July 18, 2013Applicant: KABUSHIKI KAISHA TOSHIBAInventors: Masato Okamura, Osamu Shibasaki, Seiji Yamamoto, Hajime Hirasawa
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Publication number: 20130070888Abstract: 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: ApplicationFiled: September 14, 2012Publication date: March 21, 2013Applicants: 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
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Patent number: 8320514Abstract: In a nuclear power plant, a corrosion-resistant oxide film on a surface of the metal component of a reactor structure is exposed to a high-temperature water, the corrosion-resistant oxide film containing an oxide having a property of a P-type semiconductor, and a catalytic substance having a property of an N-type semiconductor is deposited on the oxide film. The oxide film maintains the property of the P-type semiconductor.Type: GrantFiled: December 8, 2005Date of Patent: November 27, 2012Assignees: Kabushiki Kaisha Toshiba, The Tokyo Electric Power Company, IncorporatedInventors: Masato Okamura, Tetsuo Oosato, Seiji Yamamoto, Tadasu Yotsuyanagi, Nagayoshi Ichikawa, Kenji Yamazaki, Junichi Takagi, Hidehiro Urata, Shunichi Suzuki, Kenro Takamori, Junichi Suzuki
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Patent number: 8295426Abstract: 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: GrantFiled: December 10, 2004Date of Patent: October 23, 2012Assignees: Kabushiki Kaisha Toshiba, Ishikawajima-Harima Heavy Industries Co., Ltd., The Tokyo Electric Power Company, IncorporatedInventors: 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
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Publication number: 20120263269Abstract: 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: ApplicationFiled: December 10, 2004Publication date: October 18, 2012Applicants: 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
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Publication number: 20120225289Abstract: The present invention provides a corrosion-resistant structure for a high-temperature water system comprising: a structural material 1; and a corrosion-resistant film 3 formed from a substance containing at least one of La and Y deposited on a surface in a side that comes in contact with a cooling water 4, of the structural material 1 which constitutes the high-temperature water system that passes a cooling water 4 of high temperature therein. Due to above construction, there can be provided the corrosion-resistant structure and a corrosion-preventing method capable of operating a plant without conducting a water chemistry control of cooling water by injecting chemicals.Type: ApplicationFiled: November 16, 2010Publication date: September 6, 2012Applicant: Kabushiki Kaisha ToshibaInventors: Masato Okamura, Osamu Shibasaki, Koji Negishi, Seiji Yamamoto, Hajime Hirasawa, Kenji Yamazaki, Tetsuji Kaneko
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Publication number: 20120128886Abstract: In a nuclear power plant, a corrosion-resistant oxide film on a surface of the metal component of a reactor structure is exposed to a high-temperature water, the corrosion-resistant oxide film containing an oxide having a property of a P-type semiconductor, and a catalytic substance having a property of an N-type semiconductor is deposited on the oxide film. The oxide film maintains the property of the P-type semiconductor.Type: ApplicationFiled: January 31, 2012Publication date: May 24, 2012Applicants: THE TOKYO ELECTRIC POWER COMPANY, INCORPORATED, Kabushiki Kaisha ToshibaInventors: Masato Okamura, Tetsuo Oosato, Seiji Yamamoto, Tadasu Yotsuyanagi, Nagayoshi Ichikawa, Kenji Yamazaki, Junichi Takagi, Hidehiro Urata, Shunichi Suzuki, Kenro Takamori, Junichi Suzuki
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Publication number: 20120128111Abstract: In a nuclear power plant, a corrosion-resistant oxide film on a surface of the metal component of a reactor structure is exposed to a high-temperature water, the corrosion-resistant oxide film containing an oxide having a property of a P-type semiconductor, and a catalytic substance having a property of an N-type semiconductor is deposited on the oxide film. The oxide film maintains the property of the P-type semiconductor.Type: ApplicationFiled: January 31, 2012Publication date: May 24, 2012Applicants: THE TOKYO ELECTRIC POWER COMPANY, INCORPORATED, Kabushiki Kaisha ToshibaInventors: Masato OKAMURA, Tetsuo OOSATO, Seiji YAMAMOTO, Tadasu YOTSUYANAGI, Nagayoshi ICHIKAWA, Kenji YAMAZAKI, Junichi TAKAGI, Hidehiro URATA, Shunichi SUZUKI, Kenro TAKAMORI, Junichi SUZUKI
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Publication number: 20120064242Abstract: According to one embodiment, there is provided a method for monitoring corrosion in a power plant, including: forming a film with a composition of M1FeO3 (M1: trivalent or tetravalent metal) or M2Fe2O4 (M2: divalent metal) on an inner wall surface of each of apparatuses of the power plant; and maintaining the film stably by controlling an amount of introduction of oxygen into each of apparatuses commensurate with a temperature in each of the apparatuses.Type: ApplicationFiled: August 29, 2011Publication date: March 15, 2012Applicant: KABUSHIKI KAISHA TOSHIBAInventors: Osamu SHIBASAKI, Masato Okamura, Koji Negishi, Seiji Yamamoto, Toyoaki Miyazaki
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Publication number: 20120039429Abstract: The present invention provides an operation method of a plant which has a low-pressure feed water heater, a deaerator and a high-pressure feed water heater sequentially arranged in a feed water pipe reaching a steam generator from a condenser, and leads high-temperature feed water to the steam generator, wherein an oxidant is injected onto a surface of a structural material from an oxidant injection line in order to form a film that suppresses an elution of an element constituting the structural material such as the feed water pipe, the low-pressure feed water heater, the deaerator and the high-pressure feed water heater, which come in contact with the high-temperature feed water, and a corrosion suppression substance is further introduced from a corrosion suppression substance introduction line in order to deposit the corrosion suppression substance on a surface of the structural material in which corrosion accelerated by a flow of the feed water occurs.Type: ApplicationFiled: February 8, 2010Publication date: February 16, 2012Applicant: Kabushiki Kaisha ToshibaInventors: Osamu Shibasaki, Masato Okamura, Seiji Yamamoto, Toyoaki Miyazaki, Kenji Yamazaki, Tetsuji Kaneko, Minoru Kobayashi
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Publication number: 20120028038Abstract: A corrosion-resistant member has a composite titanium oxide film for reducing corrosion deposited on a surface of a construction material, where the composite titanium oxide film is represented by a molecular formula MTiO3 in which M is a transition element, and the corrosion-resistant member is preliminarily manufactured by depositing titanium oxide on the surface of the construction material, and the titanium oxide is subsequently or simultaneously subjected to high temperature treatment under existence of an ion of the transition metal.Type: ApplicationFiled: March 26, 2010Publication date: February 2, 2012Applicant: KABUSHIKI KAISHA TOSHIBAInventors: Masato Okamura, Osamu Shibasaki, Seiji Yamamoto, Toyoaki Miyazaki
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Publication number: 20110318223Abstract: A method for controlling water chemistry in a power generation plant including a low-pressure feedwater heater (18), a deaerator (19), and a high-pressure feedwater heater (20) disposed sequentially along a feedwater pipe (16) from a condenser (15) to a steam generator or a boiler (11) to control the chemistry of feedwater guided to the steam generator or the boiler includes the steps of: injecting an oxidant through an oxidant injection line (31) into feedwater flowing through the feedwater pipe disposed downstream of the condenser in such a way that a dissolved oxygen concentration in the feedwater ranges from 3 to 100 ppb while the feedwater is maintained to be neutral to form an oxide film on surfaces of the feedwater pipe, the low-pressure feedwater heater, the deaerator, the high-pressure feedwater heater, and other structural members that come into contact with the feedwater; and injecting a deoxidant through a deoxidant injection line (35) into the feedwater flowing through the feedwater pipe disposedType: ApplicationFiled: March 9, 2010Publication date: December 29, 2011Applicant: KABUSHIKI KAISHA TOSHIBAInventors: Toyoaki Miyazaki, Masato Okamura, Osamu Shibasaki, Hajime Hirasawa
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Publication number: 20110256036Abstract: A coating of niobium oxide, zirconium titanate, or nickel titanate is formed on at least a part of a surface of a jet pump member constituting a jet pump serving as a reactor internal structure of a boiling water reactor. Further, a solution containing, e.g., a niobium compound is applied to at least a part of the surface of the jet pump member constituting the jet pump, and the jet pump member coated with the solution is heat-treated to form a coating of, e.g., niobium oxide. With this configuration, the jet pump member constituting the jet pump of the boiling water reactor is provided such that deposition of crud can be sufficiently suppressed on the jet pump member.Type: ApplicationFiled: December 10, 2009Publication date: October 20, 2011Applicant: Kabushiki Kaisha ToshibaInventors: Akio Sayano, Norihisa Saito, Tetsuji Kaneko, Yasuo Morishima, Masato Okamura, Kenji Yamazaki, Kunihiko Kinugasa
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Patent number: 7449101Abstract: 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: GrantFiled: February 5, 2003Date of Patent: November 11, 2008Assignees: 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
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Publication number: 20060146975Abstract: In a nuclear power plant, a corrosion-resistant oxide film on a surface of the metal component of a reactor structure is exposed to a high-temperature water, the corrosion-resistant oxide film containing an oxide having a property of a P-type semiconductor, and a catalytic substance having a property of an N-type semiconductor is deposited on the oxide film. The oxide film maintains the property of the P-type semiconductor.Type: ApplicationFiled: December 8, 2005Publication date: July 6, 2006Applicants: Kabushiki Kaisha Toshiba, THE TOKYO ELECTRIC POWER COMPANY, INCORPORATEDInventors: Masato Okamura, Tetsuo Oosato, Seiji Yamamoto, Tadasu Yotsuyanagi, Nagayoshi Ichikawa, Kenji Yamazaki, Junichi Takagi, Hidehiro Urata, Shunichi Suzuki, Kenro Takamori, Junichi Suzuki
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Publication number: 20030180180Abstract: 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: ApplicationFiled: February 5, 2003Publication date: September 25, 2003Applicants: 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