•The Nuclear Regulatory Commission estimates that the
average American absorbs 620
mRem a year* (or 0.071 mRem/hour)
•An average transatlantic flight produces an exposure
of 2.5 mRem*
•A typical chest x-ray produces 10 mRem per image
•EPA guidelines call for public health actions if
exposure exceed 1000
mRem over 4 days
* Source: NRC: http://nrc.gov/images/about-nrc/radiation/factoid2-lrg.gif