| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for preventing adhesion of a radioactive nuclide to a carbon steel member of a nuclear power plant capable of further reducing the adhesion of the radioactive nuclide to the carbon steel member of the nuclear power plant, which is to come in contact with furnace water.SOLUTION: The method comprises S1 of connecting a circulation pipeline of the film formation device to a purification system pipe, which is a carbon steel member of a boiling water reactor (BWR) plant, S2 of performing reduction decontamination of an inner surface of the purification system pipe, S7, S8, and S9 of injecting a zinc ion, a chromate ion, and a reducer (for example hydrazine) capable of increasing a pH into the circulation pipeline after completion of the reduction decontamination, S10 of supplying a film formation solution containing the zinc ion, the chromate ion, and the reducer, and having a pH in a range between 4.8 to 11.4, to the purification system pipe, S11 of forming a zinc chromite film on the inner surface of the purification system pipe by contact of the film formation solution with the inner surface of the purification system pipe, and S13 of detaching the circulation pipeline of the film formation device from the purification system pipe.SELECTED DRAWING: Figure 1 |
