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..

(Source)

荒川区立汐入小(南千住)敷地内で毎時六・四六マイクロシーベルトの放射線量を検出した問題で、区内すべての小中学校と幼稚園、保育園で区が測定した結果、同小を含む五十カ所で、区の除染基準である地表で毎時〇・二三マイクロシーベルト以上だったことが分かった。保護者からは「高い数値に驚いた」と不安の声が出ている。

区が測定したのは八十二カ所。除染基準を上回ったのは幼稚園十、保育園十三、小学校十六、中学校十、朝鮮初中級学校一。一・〇マイクロシーベルトを上回った小中学校も六校あった。
最高値を検出した汐入小の長谷川かほる校長は「もともと子どもが立ち入らない場所だが、専門家に測定してもらい、かえって安心した。保護者からの問い合わせには丁寧に答え、学校便りでも詳しく書く」と話す。

同小女子児童の四十代の母親は二十三日、区ホームページで知った。二十四日は娘が登校したが、学校から説明はなかったという。「保育園では測定結果がすぐ周知されたと聞く。数値の意味、対策など知りたいことだらけ。説明会を開いてほしい」と求める。

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.

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