Regarding the Fukushima Daiichi Nuclear Power Station, where decommissioning work is being carried out, TEPCO had a series of troubles that seemed to be affected by the earthquake on the night of the 16th, but no serious equipment failures have been confirmed so far. I explained.
At the press conference, TEPCO explained the situation of the Fukushima Daiichi and Daini nuclear power plants, which observed shaking with a seismic intensity of less than 6.
Fukushima Daiichi nuclear power plant
Among these, at Fukushima Daiichi Nuclear Power Station Unit 1, the pressure inside the containment vessel containing the nuclear fuel that melted down in the accident, so-called "fuel debris," rose immediately after the earthquake and then fell, and is now lower than before the earthquake. It means that it is.
In addition, the water level inside the containment vessel also dropped temporarily, so TEPCO is investigating the cause of the change in pressure and water level.
In the Unit 4 reactor building, a part of the steel frame assembled to attach the outer wall fell inside the cover that covered the building installed for the purpose of extracting spent nuclear fuel.
No one was injured.
At Units 5 and 6, multiple puddles were found in the reactor building, and TEPCO is investigating the cause of the puddles, assuming that the water in the spent nuclear fuel pool overflowed due to the shaking of the earthquake.
On the premises of the nuclear power plant, six outdoor containers that store radioactive waste such as iron scraps generated during decommissioning work and protective clothing for workers collapsed, and some waste was out of the container. There was no leakage of radioactive material.
Fukushima Daini Nuclear Power Plant
On the other hand, even at the Fukushima Daini Nuclear Power Plant, there were problems such as the shutdown of some facilities, but so far no major impact has been confirmed.
TEPCO will continue to patrol the premises of the nuclear power plant and be vigilant.Keywords: