Patent ID: 8295426

Claim:
A method of reducing corrosion of a material constituting a nuclear reactor structure, comprising the steps of: injecting, into nuclear reactor water, a solution or a suspension containing a substance generating an excitation current in a nuclear reactor having feed water and the nuclear reactor water, wherein a metal or a metallic compound forms the substance generating the excitation current under a condition in the nuclear reactor; depositing the substance generating an excitation current to a surface of the material of the nuclear reactor structure by an amount of more than 10 μg/cm 2 and less than 200 μg/cm 2 , the substance being a conductive TiO 2 ; and injecting, into the nuclear reactor water, a further solution of hydrogen while controlling a hydrogen concentration in the feed water to be more than 0.2 ppm and less than 1.0 ppm to thereby control a corrosion potential, wherein the electrochemical corrosion potential is controlled in a range of −0.4 V vs. SHE to −0.1 V vs. SHE under a condition when no ultraviolet light is applied to the substance generating an excitation current.