Patent ID: 7844024
Filing Date: 2010-11-30
Classification: G21C,G21F,Y02E

Abstract:
1. A method of suppressing deposition of radionuclides on components of a nuclear power plant comprising: connecting a pipe having a pump to piping of the nuclear power plant; removing contaminants including an oxide film deposited on an inner surface of the piping by chemical decontamination; forming a ferrite film on the inner surface of the piping by supplying a liquid, which is pressurized by the pump and has a temperature adjusted within 60° C. to 100° C. by a heating apparatus provided on the pipe and a pH adjusted to within 5.5 to 9.0, comprising iron (II) ions, and a chemical for oxidizing the iron (II) ions to iron (III) ions into the piping after connecting the pipe to the piping, and after the chemical decontamination; and depositing noble metal on the ferrite film by supplying a solution including a noble metal to the piping through the pipe after formation of the ferrite film, wherein the steps of connecting the pipe, removing the contaminants, forming the ferrite film, and depositing the noble metal are carried out after the nuclear power plant is stopped and before starting the nuclear power plant.