250km area will be evacuating area if the spent fuel pool is damaged at reactor 4

On 3/25/2011, Nuclear Safety Commission submitted the report in case another hydrogen explosion happened in Fukushima.

From this report:
1) 170 km area will be mandatory evacuating area.(including South Tohoku, Niigata, North Kanto)
2) 250 km area will be evacuating area.(including Tokyo, Saitama, Yokohama)

Japanese government asserts the worst senario was avoided by reinforcing the spent fuel pool of reactor 4 etc..
They state they didn’t disclose the report not to cause a panic.
but I post this because Fukushima seems to be back to the crisis again.

(Source)

内閣府原子力委員会が今年3月の東京電力福島第一原子力発電所事故の発生直後に、「福島第一原子力発電所の不測事態シナリオの素描」と題した報告書をまとめ、同事故発生から2週間後の3月25日に当時の菅首相に提出していたことが分かった。
報告書によると、同原発で新たな水素爆発などが起こり最悪の事態に発展した場合には、〈1〉同原発から半径170キロ・メートル圏内で強制移住〈2〉同250キロ・メートル圏内で避難―――の必要があると指摘。170キロ・メートル圏内には南東北や新潟県の一部、北関東の一部が、250キロ・メートル圏内には東京都や埼玉県の大半、横浜市の一部がそれぞれ含まれる。

政府は、同報告書を踏まえ、最も核燃料の溶融が懸念された4号機について耐震補強工事を施すなどし、こうした事態は回避された。政府関係者は、「最悪の事態が起きても避難する時間的余裕はあり、パニックを防ぐため報告書は公表しなかった」としている。

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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