Steam with 3000-4000 mSv per hour in Fukushima 1

In Fukushima 1 steam comes out with a radiation of 3000-4000 mSv per hour. To get a picture, how high this is: The non-hazardous dosage is considered to be 0.0001 mSv per hour pro and at 150 mSv symptoms of radiation syndrome will occur.

Source: http://www3.nhk.or.jp/daily/english/04_16.html