Patent ID: 6940939

Claim:
A method of suppressing corrosion of a reactor structural member of a water-cooled nuclear reactor, comprising: controlling a corrosion potential of the reactor structural member by providing a corrosion potential reducing substance on a surface of the reactor structural member, the corrosion potential reducing substance being a photocatalytic substance which produces an electromotive force under an irradiation of a light or a radioactive ray in the water-cooled nuclear reactor, the corrosion potential reducing substance being formed as particles made of TiO 2 prior to introduction into water which is a coolant of the water-cooled nuclear reactor, each particle having a surface on which at least one of Pt, Rh, Ru and Pd is provided, wherein a solution or a suspension of a composition containing the photocatalytic substance is added to the water of the water-cooled nuclear reactor so as to make the photocatalytic substance adhere to the surface of the reactor structural member or to form a film of the photocatalytic substance on the surface of the reactor structural member, and wherein the reactor structural member is made of an iron-base or nickel-base alloy, and the corrosion potential reducing substance is formed on a corrosion oxide film formed on the surface of the reactor structural member.