Tepco conducted the robot survey of reactor1 as they announced yesterday. We haven’t received the details of data (Tepco had not published the data at this time) yet, but sounds like the radiation level was high as usual. It was 4000mSv/h around where the steam was coming up from the pipe sleeve on the South-East side of the building last year.
*It was not 4000mSv/h, but 5000mSv/h. He misunderstood the number.
Maybe it was 4700mSv/h last year, so it slightly decreased (* Because it was actually 5000mSv/h, it slightly increased. He misunderstood the number.) but human can never approach it yet. Today robot didn’t work at the beginning, the ending time was later than they scheduled. Anyway, we must rely on the robots at the highly contaminated places in reactor building for a while.
Anyway, there are still a lot of highly radioactive places where human workers have to go. Probably we must take the “human-wave tactics” where is about 100 ~ 120 mSv/h. but the problem is if we can collect enough human workers, even now sub-contract companies are struggling to collect nuclear workers.
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.