The Tokyo Electric Power Company, Incorporated

Kabushiki Kaisha Toshiba

Ishikawajima-Harima Heavy Industries Co., Ltd.

Mitsubishi Heavy Industries Limited

Shunichi Suzuki

Seiji Yamamoto

Masato Okamura

Kenji Yamazaki

Junichi Takagi

Nagayoshi Ichikawa

Tetsuo Oosato

Tadasu Yotsuyanagi

Kenro Takamori

Junichi Suzuki

Hidehiro Urata

Mitsuru Sambongi

Yuichi Fukaya

Takashi Hirano

Takeshi Shibano

Masaki Taneike

Toshio Yonezawa

Yasuhiro Sakaguchi

Kazuo Murakami

Hiroshi Kanasaki

Toshihiko Iwamura

Hidehito Mimaki

Kenrou Takamori

Suguru Ooki

Naoki Anahara

Naoki Hiranuma

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

There are provided an austenitic stainless steel having high stress corrosion crack resistance, characterized by containing, in percent by weight, 0.030% or less C, 0.1% or less Si, 2.0% or less Mn, 0.03% or less P, 0.002% or less S, 11 to 26% Ni, 17 to 30% Cr, 3% or less Mo, and 0.01% or less N, the balance substantially being Fe and unavoidable impurities; a manufacturing method for an austenitic stainless steel, characterized in that a billet consisting of the said austenitic stainless steel is subjected to solution heat treatment at a temperature of 1000 to 1150&#xb0; C.; and a pipe and a in-furnace structure for a nuclear reactor to which the said austenitic stainless steel is applied.

Austenitic stainless steel, manufacturing method for the same, and structure using the same

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

Chiyoda-ku, Japan

Shunichi Suzuki