At Fukushima Daiichi Nuclear Power Station Units 1 and 3, which continue to cool the nuclear fuel that melted down in the accident 10 years ago, it was found that the water level in the containment vessel containing the nuclear fuel was dropping.

TEPCO says that the earthquake on the 13th of this month may have affected it, but that there is no problem in cooling the melted nuclear fuel and that there is no external impact.

According to TEPCO, it was confirmed that the water level in the reactor containment vessel had dropped on the night of the 18th at Unit 1 of the Fukushima Daiichi Nuclear Power Plant, which continues to monitor data.



Upon closer examination, the water level in Unit 1 was about 1 meter and 90 centimeters from the bottom of the containment vessel, but it was about 40 to 70 centimeters, and even in the containment vessel of Unit 3, it was about 6 meters and 30 centimeters from the bottom. The water level seems to have dropped by about 30 centimeters.



The water level at Unit 1 started to drop on the 15th at the latest and on the 3rd at the latest on the 17th, and as of the 19th, both have continued to drop by several centimeters a day.



TEPCO says that the amount of water leaking into the building may have increased due to the effects of the earthquake, such as the spread of damaged parts created by the nuclear accident.



There is a problem in cooling the melted nuclear fuel because the value of the thermometer attached to the bottom of the reactor inside the containment vessel has not risen and the water injection into the reactor is continuing. I haven't.



In addition to the level of radioactivity inside the containment vessel, there are no abnormalities in the values ​​of equipment such as monitoring posts that measure radiation levels on the premises or at the boundary of the site, so it is said that there is no external impact so far. is.



TEPCO will continue to monitor the data and will consider increasing the amount of water injected into the reactor if the water level continues to decline.

NRA “Currently no impact”

Regarding the fact that the water level in the reactor containment vessels of TEPCO's Fukushima Daiichi Nuclear Power Plant Units 1 and 3 has dropped There is no.



The NRA will continue to monitor changes in water level and temperature.