Patent ID: 6907891

Claim:
A radioactive substance decontamination apparatus for decontaminating a metal member contaminated by a radioactive substance using a reducing decontamination agent, comprising: multiple reducing decontamination tanks having different radiation control values as upper limit values for a radiation dose of a reducing decontamination agent stored inside, said multiple reducing decontamination tanks including a first reducing decontamination tank and a second reducing decontamination tank; wherein said second reducing decontamination tank has a radiation control value that is higher than that of said first reducing decontamination tank; a carrier for taking out said metal member from said second reducing decontamination tank and placing said metal member in said first reducing decontamination tank; a tube for transferring the reducing decontamination agent in the first reducing decontamination tank into the second reducing decontamination tank; a first reducing agent decomposer for decomposing a component contained in the reducing decontamination agent of the reducing decontamination tank where said radiation control value is the highest out of the reducing decontamination tanks connected by said tube; a washing tank for washing said reducing decontamination agent deposited on said decontaminated metal member; and a second reducing decontamination agent decomposer for decomposing reducing decontamination agent in a reducing decontamination tank to which said tube is not connected.