2021 Volume 70 Issue 12 Pages 436-440
In the primary containment vessel （PCV） of Fukushima Daiichi Nuclear Power Station （1F）, corrosion data for understanding and predicting the corrosion behavior at the water line under the gamma-ray irradiation environment, which could be a potential problem, were obtained by the corrosion test. The results of corrosion tests clearly showed that the corrosion was accelerated by the superposition of water film effect and irradiation effect. From the viewpoint of the corrosion acceleration mechanism, it was considered that the oxygen supply from the atmosphere was more pronounced near the water line and the concentration of hydrogen peroxide produced by the radiolysis of water was higher, both of which contributed to the corrosion acceleration.
