主题：日本福岛核电站传来爆炸声 -- 葡萄

An acute whole-body dose of under 50 rem is typically subclinical and will produce nothing other than blood changes. 50 to 200 rem may cause illness but will rarely be fatal. Doses of 200 to 1,000 rem will probably cause serious illness with poor outlook at the upper end of the range. Doses of more than 1,000 rems are almost invariably fatal

1 rem = 0.01 Sv = 10 mSv = 10000 μSv