Mr. Zun from National Institute of Radiological Sciences measured Plutonium 241(half life time 14.4 years) from 3 points of Namiemachi (26km) and Iidate mura (32km).
They published the result on scientific reports of 3/8/2012.
It was in the dead leaves of Namiemachi and Iidatemura taken in April and May, and the soil from J-village.
Plutonium 239 (half life time 24,000 years) and plutonium 240 (6,600 years) were also measured.
Dead leaves of Namiemachi : 34.8 Bq/Kg
Dead leaves of Iidatemura : 20.2 Bq/Kg
J-village : 4.52 Bq/Kg
Plutonium 241 turns to be Americium 241 (half life time 432.7 years), which is concentrated in pulse plants.
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.