50 locations exceeded mandatory decontamination limit in Arakawaku

Having measured 6.46 micro Sv/h at Shioiri elementary school in Arakawaku Tokyo, the ward government measured all the elementary schools, kindergarten, and nursery schools.

As a result, 50 of 82 locations turned out to be contaminated worse than 0.23 micro Sv/h, which is the “decontamination limit”.

Details are:

  • 10 kindergarten
  • 13 nursery school
  • 16 elementary school
  • 10 junior highschool
  • 1 Korean school

6 of elementary schools and junior schools were contaminated worse than 1.0 micro Sv/h.

Arakawa ward government banned going into those areas and started decontamination, such as high-pressure washing, changing the soil or cover the ground with concrete.

However, some people criticizes decontamination is useless because high-pressure washing only scatters around radioactive particles, and the water is contaminated itself etc..





区は、基準を上回った五十カ所を立ち入り禁止とし、舗装部分は高圧洗浄、土は入れ替えるなどした。それでも一・〇マイクロシーベルトを下回らない場所は、土を取り除きコンクリートで固めるなどの対応を検討中。数値などは今後、小中学校などの掲示板にも張り出すという。 (井上圭子)

About this site

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.


November 2011