Kabushiki Kaisha Toshiba

Yukio Hemmi

Kenji Yamazaki

Junichi Takagi

Nagayoshi Ichikawa

Tetsuo Oosato

Minoru Kobayashi

Hajime Hirasawa

Shuji Seki

Ichiro Inami

Yutaka Uruma

Fumihiko Ishibashi

Takao Baba

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.

Reactor structural member and method of suppressing corrosion of the same

Migration of radioactive materials from a pressure vessel to a steam system in a nuclear power plant is suppressed by using a dryer () provided with corrugated plates () having surfaces coated with an inorganic ion-exchange material stable under a condition in which high-temperature water exist, such as TiO.

Nuclear power plant system and method of operating the same

A method for controlling water quality in a nuclear reactor comprises a first and second steps. The first step is to make an amount of iron, which is carried into the nuclear reactor and corrosively eluted from structural material within the nuclear reactor into reactor water, at least twice as much as any one of an amount of nickel, which is carried into the nuclear reactor, and an amount of nickel, which is generated in the nuclear reactor. The second step is to limit an upper limit of concentration value of iron in system water supplied into the nuclear reactor to up to 0.10 ppb.

Method for controlling water quality in nuclear reactor and nuclear power plant to which the method is applied

Growing community of inventors

Yokohama, Japan

Yukio Hemmi