February 22 – Tokyo Electric Power Company, the operator of the Fukushima Daiichi nuclear power plant in Japan, said that the storage facilities of Unit 1 nuclear reactor were abnormal, and the internal pressure was lower than normal, which may be due to gas leakage caused by the earlier earthquake.
According to a report by the Japan Broadcasting Association on the 22nd, the Fukushima Daiichi nuclear power plant has been injecting nitrogen into the storage facility to keep its internal pressure at 1.2 kPa in order to prevent hydrogen explosions of the nuclear reactor being dismantled.
However, at about 6 p.m. on the 21st, the nuclear power plant found that the internal pressure of Unit 1 had dropped to 0.9 kPa.
On February 13, after an earthquake of magnitude 7.3 off Fukushima, the water level inside the storage facility of Unit 1 dropped.
Tokyo Electric Power Company said that after the internal water level fell, the damaged part of the nuclear accident 10 years ago may be exposed to the air again, causing internal gas to leak, which will trigger a pressure drop.
Tokyo Electric Power Company said that as long as water is continuously injected into the storage facility, there will be no safety problems, and multiple monitoring points in the station also showed that the radiation value was not abnormal, which can be considered as no radioactive material leakage.
Tokyo Electric Power Company will continue to monitor the values of the nuclear reactor storage facility.