Reactor structural member and method of suppressing corrosion of the same
AssigneeKabushiki Kaisha Toshiba
InventorsNagayoshi Ichikawa, Yukio Hemmi, Tetsuo Oosato, Junichi Takagi, Kenji Yamazaki
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Abstract
A photocatalytic substance having the properties of an n-type semiconductor is deposited on a surface of a metal base made of a stainless steel or Inconel. When necessary, the hydrogen concentration of the reactor water is increased. A current produced by the photocatalytic substance when the same is irradiated with light or radioactive rays in a nuclear reactor flows through the metal base to reduce corrosion current. When necessary, the photocatalytic substance is provided on its surface with at least one of Pt, Rh, Ru and Pd.
Claims9
A reactor structural member comprising:
- a surface adapted to be located in a reactor water of a nuclear reactor;
- and
- a corrosion potential reducing substance provided on the surface, the corrosion potential reducing substance being selected from the group consisting of a photocatalytic substance which produces an electromotive force under an irradiation of a light or a radioactive ray in the nuclear reactor and a metal or a metal compound which forms the photocatalytic substance under a condition specified by a temperature and a pressure in the nuclear reactor.
Dependencies are inferred from the claim text.