Gov't to designate 'difficult-to-return zones' near crippled Fukushima nuclear plant

The government is expected to consider designating areas that are exposed to more than 50 millisieverts per year of radiation from the crippled Fukushima No. 1 Nuclear Power Plant as zones that are difficult for local residents to return to possibly for the next several decades and buying out tracts of land there.


Article at Mainichi Daily News: http://mdn.mainichi.jp/mdnnews/national/archive/news/2011/12/14/20111214p2a00m0na021000c.html

From becquerels Bq to sieverts Sv for cesium in meat

It is difficult to convert becquerels to sieverts, a unit indicating the degree of harm to the human body, because there are too many variables.

The Asahi Shimbun reported Tuesday that an adult could get a dose of 3.9 millisieverts by eating 200 grams of meat with 3,400 becquerels per kg every day for a year.

A dose of 100 millisieverts is believed to increase the chance of death by cancer by 0.5 percent.

From: The Japan Times

My Fallout History 私の核実験被ばく歴

1951年から1970年までの間、米国ネバダ核実験場では放射性物質を大気に出した核実験が９３以上行われた。総出力は広島の16キロトンと長崎の２１キロトンと比べて、その核実験の総出力が110キロトンまでであった。

1982年から1993年まで米国の国立がん研究所（NCI)が上述の核実験による甲状腺の内部被ばくに関する調査を行った結果、以下の群別分布を試算した。

核実験場から2000ｋｍぐらい離れた小さい時代のミネソタ州自宅までも広がった。