Kabushiki Kaisha Toshiba

The Tokyo Electric Power Company, Incorporated

Mitsubishi Denki Kabushiki Kaisha

Ishikawajima-Harima Heavy Industries Co., Ltd.

Nisshinbo Industries, Inc.

Renesas Electronics Corporation

Kawasaki Steel Corporation

Seiji Yamamoto

Masato Okamura

Osamu Shibasaki

Kenji Yamazaki

Tetsuo Oosato

Koji Negishi

Junichi Takagi

Nagayoshi Ichikawa

Hajime Hirasawa

Shunichi Suzuki

Tadasu Yotsuyanagi

Kenro Takamori

Tetsuji Kaneko

Toyoaki Miyazaki

Hidehiro Urata

Hiroyuki Arai

Junichi Suzuki

Mitsuru Sambongi

Yuichi Fukaya

Kazuo Saito

Takashi Hirano

Yutaka Uneme

Yutaka Uruma

Kazuo Murakami

Takeshi Shibano

Kenji Yoshino

Yoshihiro Naruse

Atsushi Hagiwara

Minoru Kobayashi

Koji Goto

Yasushi Okamoto

Masami Enda

Yumi Yaita

Norihide Enomoto

Kenji Kanoh

Hideyo Haruhana

Yasushi Mochizuki

Hiromi Aoi

Hiromichi Koga

Yukio Henmi

Takasi Hirano

Miki Shiraishi

A chemical solution injection systemof an embodiment includes: a chemical solution reservoirthat stores a chemical solution containing a depositing substance to deposit to a member in contact with cooling water for absorbing heat in a plant; a pipethrough which the chemical solution passes; a first heat exchanger and a second heat exchanger that exchange heat between the cooling water and the chemical solution; a cooling water pipewhich connects the heat exchangers in series and in which the cooling water passes; and a pumpthat conveys the chemical solution. The temperature of the chemical solution in the chemical solution reservoiris lower than that of the cooling water. The pipesequentially connects the chemical solution reservoir, the first heat exchanger, the second heat exchanger and the plant. The cooling water guided from the inside of the plant passes through the second heat exchanger and subsequently passes through the first heat exchanger. The chemical solution passes through the first heat exchanger and subsequently passes through the second heat exchanger.

Chemical solution injection system and chemical solution injection method

In a plant including a system which is provided with a steam generator, a turbine, a condenserand a heaterand in which non-deaerated water circulates, and a pipe, the steam generator, the heaterandof the system which comes into contact with the non-deaerated water is deposited with a protective substance.

Method for suppressing corrosion in plant and plant

The present invention provides a corrosion-resistant structure for a high-temperature water system comprising: a structural material; and a corrosion-resistant filmformed 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, of the structural materialwhich constitutes the high-temperature water system that passes a cooling waterof 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.

Corrosion-resistant structure for high-temperature water system and corrosion-preventing method thereof

A photocatalyst injection system including: a reactor primary system coolant collection section collecting a reactor primary system coolant containing a noble metal or noble metal ion from a reactor primary system; a photocatalyst addition section adding a photocatalyst to the collected reactor primary system coolant; an ultraviolet irradiation section irradiating, with ultraviolet rays, the coolant to which the photocatalyst has been added for producing, in the coolant, a noble metal-carrying photocatalyst in which the noble metal is carried on a surface of the photocatalyst; and a noble metal-carrying photocatalyst injection section injecting the coolant containing the noble metal-carrying photocatalyst into the reactor primary system.

Photocatalyst injection method and photocatalyst injection system

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

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 MTiOin 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.

Corrosion-resistant member and method of manufacturing the same

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.

Plant operation method and plant operation system

In an embodiment, a semiconductor integrated circuit device includes a driver circuit that drives a transmission line, an output terminal coupled to the output of the driver circuit, and a variable-impedance circuit. The variable-impedance circuit is coupled, for example, between the driver circuit and the output terminals for series-termination of the transmission line.

Semiconductor integrated circuit device, electronic device, and radio communication device

Provided is a method for monitoring corrosion in a power plant, including: forming a film with a composition of M1FeO(M1 is a trivalent or tetravalent metal) or M2FeO(M2 is a divalent metal) on the inner wall surface of an apparatus of the power plant; and maintaining the film stably by controlling the amount of introduction of oxygen into the apparatus commensurate with a temperature in the apparatus.

Method for monitoring corrosion protection in power plant

A radiation exposure reduction method includes the steps of: injecting iron into a coolant which flows from the reactor cooling system to the reactor core in a nuclear power plant; and ferritizing and fixing radionuclides or parent nuclides thereof, which are contained in the coolant, on the surface of a reactor core structure, wherein an iron citrate which is soluble organic iron, or iron oxalate or iron fumarate which has a particle diameter of 3 &#x3bc;m or less, is used as the iron to be injected into the coolant.

Radiation exposure reduction method

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

Growing community of inventors

Tokyo, Japan

Seiji Yamamoto