Kabushiki Kaisha Toshiba

The Tokyo Electric Power Company, Incorporated

Hidehiro Urata

Seiji Yamamoto

Masato Okamura

Tetsuo Oosato

Kenji Yamazaki

Junichi Takagi

Nagayoshi Ichikawa

Shunichi Suzuki

Tadasu Yotsuyanagi

Kenro Takamori

Junichi Suzuki

Hiroyuki Arai

Osamu Shibasaki

Hajime Hirasawa

Koji Negishi

Kazuo Murakami

A method for injecting a corrosion inhibitor injecting an oxidant and an anticorrosive agent-pH adjusting agent complex including an anticorrosive agent and a pH adjusting agent adsorbed on a surface of the anticorrosive agent into high temperature water in contact with a surface of a metal structural material and irradiating the high temperature water with a radioactive ray or an ultraviolet ray, wherein the anticorrosive agent of the anticorrosive agent-pH adjusting agent complex has, on the surface of the anticorrosive agent, an active site where the pH adjusting agent reacts with the oxidant, and the pH adjusting agent present on the surface of the anticorrosive agent of the anticorrosive agent-pH adjusting agent complex and/or in the high temperature water is oxidized with the oxidant by the irradiation with the radioactive ray or the ultraviolet ray to change pH adjusting ability of the pH adjusting agent and shift a pH of the high temperature water to a neutral side, and thereby deposition of the anticorrosive agentto the metal structural materialis accelerated.

Corrosion inhibitor injecting method

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

Growing community of inventors

Yokohama, Japan

Hidehiro Urata