In the EPA's 1999 Federal Guidance Report #13(FGR 13), Cancer Risk Coefficients for Environmental Exposure to Radionuclides, the authors conclude that women have a 48 percent higher radionuclide-related cancer mortality risk than men.
The differences in risk are even greater when considering organ-specific cancers, especially given that both reports identify breast, ovarian, lung, colon, and thyroid tissues as the most radiosensitive among women.