FIGURE 4.4a Size differences in the populations near nuclear facilities.

share the population around them are of different type; therefore, the radioactive release content or pathways of exposure may be different. An example describing such a situation is the conversion facility in Metropolis, Illinois, operated by Honeywell International, Inc., and the uranium enrichment facility in Paducah, Kentucky, operated by USEC Inc. These two types of facilities are in such close proximity that there is an almost complete overlap of the exposed population within the 50-km zone (Figure 4.4c).

The above-mentioned example is also an example of facilities being located at or near the border of two or more states; hence, the population

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