that the largest contribution of radiation exposure
to the public is from natural sources of radiation,
namely radon, and cosmic radiation.
National Council on Radiation Protection and Measurements
(NCRP), 1987, "Ionizing Radiation Exposures of
the Population of the United States", Report No.
93, Washington, DC: National Council on Radiation
Protection and Measurements.
* The NCRP backround
information for their chart included under "Other"
exposures; Occupational, Fallout, Nuclear Fuel Cycle,
and Miscellaneous with a total exposure from these sources
of 0.8%. This resulted in a chart total of 100.8%.
We have rounded up 0.8% "Other" exposures
to 1%, and reduced the radon estimated exposure by 1%
so that the total will not exceed 100%. The reader
should be reminded that these percentages are estimates
and, as noted in the NCRP report, "...subject to