Approximate Absolute Risks of Cancer Mortality (BEIR II) Dose ) 1500 mrem/yr bone surface (high LET) 1500 mrem/yr lung (high LET) Percent of Normal Cancer Deaths Cancer Mortality 0.2 in 100,000 07 70 in 100,000 20 0.9 in 100,000 03 Natural Background of 100 mrem/yr whole body (low LET) Congressional Aide's Su ted Start of Disability Payments Due to Radiation Cause Los Alamos 10