Approximate Absolute Risks of Cancer Mortality (BEIR II) Dose Cancer Deaths 1500 mrem/yr bone surface (high LET) 1500 mrem/yr lung (high LET) Percent of Normal Cancer Mortality 0.2 in 100,000 0.7 75 in 100,000 25 09 in 100,000 03 Natural Background of 100 mrem/yr w (low LE body Congressional Aide's suggested Start of Disability Payments Due to Radiation Cause 10