Kabushiki Kaisha Toshiba

The Tokyo Electric Power Company, Incorporated

Ishikawajima-harima Heavy Industries Co., Ltd.

Tadasu Yotsuyanagi

Seiji Yamamoto

Masato Okamura

Kenji Yamazaki

Junichi Takagi

Tetsuo Oosato

Nagayoshi Ichikawa

Shunichi Suzuki

Kenro Takamori

Junichi Suzuki

Hidehiro Urata

Mitsuru Sambongi

Yuichi Fukaya

Takashi Hirano

Takeshi Shibano

Kazuo Murakami

Yukio Henmi

Takasi Hirano

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.

Method of reducing corrosion of nuclear reactor structural material

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.

Nuclear power plant, method of forming corrosion-resistant coating therefor, and method of operating nuclear power plant

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&#xb0; 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.

Method of reducing corrosion of metal material

Growing community of inventors

Yokohama, Japan

Tadasu Yotsuyanagi