Source : fukushima-is-still-news
12 hours needed for people within 30-km radius of nuclear plants to evacuate : study
https://mainichi.jp/english/english/newsselect/news/20140114p2a00m0na010000c.html
January 14, 2013
At least 12 hours would be needed for everyone living within a radius of 30 kilometers from nuclear power plants in Japan to evacuate in (...)