More than 1,000 times higher than annual safety limit detected outside Reactor 2 vessel
Photo : Drone exploring over the cover of Reactor 2 PCV by Nuclear Regulation Authority [URL]
On the 8th of September, 2021, Nuclear Regulation Authority announced that a drone detected 1.1 Sv/h outside the vessel of Reactor 2. This is over 1,000 times higher than the annual safety limit for ordinary people.
The drone explored over the upper cover of the primary containment vessel (PCV) of Reactor 2. The cover is made of concrete and 12m in diameter.
Despite the shielding effect of the thickness of the concrete, the high level of radiation was measured in a 5cm deep hole, which the drone drilled on the cover.
It is estimated that a significant volume of scattered molten fuel is attached inside the concrete cover. The Nuclear Regulation Authority commented that this is going to be an extremely serious obstacle to proceed with decommissioning.
Video : Unit 2 reactor building operating floor at TEPCO’s Fukushima Daiichi NPS by Nuclear Regulation Authority in Japan.
This website updates the latest news about the Fukushima nuclear plant and also archives the past news from 2011. Because it's always updated and added live, articles, categories and the tags are not necessarily fitted in the latest format.
I am the writer of this website. About page remains in 2014. This is because my memory about 311 was clearer than now, 2023, and I think it can have a historical value. Now I'm living in Romania with 3 cats as an independent data scientist.
Actually, nothing has progressed in the plant since 2011. We still don't even know what is going on inside. They must keep cooling the crippled reactors by water, but additionally groundwater keeps flowing into the reactor buildings from the broken parts. This is why highly contaminated water is always produced more than it can circulate. Tepco is planning to officially discharge this water to the Pacific but Tritium is still remaining in it. They dilute this with seawater so that it is legally safe, but scientifically the same amount of radioactive tritium is contained. They say it is safe to discharge, but none of them have drunk it.