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AssigneeHitachi, Ltd.
InventorsMasato Nakamura, Yamato Asakura, Yoshiyuki Takamori, Kazuhiko Akamine, Katsumi Ohsumi, Masanori Sakai, Yoichi Wada
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Surfaces of the structural components of a nuclear power plant exposed to reactor water are wetted with an electroless plating solution containing an electrical insulating substance. The electrical insulating substance has a high resistivity about 105 (100000) times those of the structural components of the nuclear power plant or above. A metal film containing the electrical insulating substance is formed on the surfaces of the structural components exposed to the reactor water by wetting the surfaces of the structural components with the electroless plating solution. Thus, the electrochemical corrosion potential of the structural components is reduced regardless of whether hydrogen is injected into the reactor water.
A method of surface-treating structure components of a nuclear power plant, said method comprising wetting the surfaces of the structural components of the nuclear power plant to be exposed to reactor water with an electroless plating solution containing at least either an electrical insulting substance or an oxide having a lattice oxygen anion diffusing property for reducing electrochemical corrosion potential.
A method of surface-treating structural components of a nuclear power plant, said method comprising wetting the surfaces of the structural components of the nuclear power plant to be exposed to reactor water with an electroless plating solution containing at least either an electrical insulating substance or an oxide having a lattice oxygen anion diffusing property for reducing electrochemical corrosion potential after processing the structural components by a chemical decontamination process.
A method of surface-treating structural components of a nuclear power plant, said method comprising disposing an electroless plating solution supply system having an injection nozzle for injecting an electroless plating solution containing at least either an electrical insulating substance or an oxide having a lattice oxygen anion diffusing property between a reactor vessel and a reactor vessel flange, and injecting the electroless plating solution into the reactor vessel for reducing electrochemical corrosion potential by the electroless plating solution supply system.
Dependencies are inferred from the claim text.