ENVIRONMENTAL RADIATION
An array of thermoluminescent dosimeters (TLDs) is distributed throughout the Eastern Snake River Plain to monitor for environmental radiation (Figure 14). TLDs are changed out in May and again in November after six months in the field. The results of the spring sampling of TLDs exposed from November 2001 to May 2003) are discussed below.
Similar to the low-volume air results the environmental dosimeter locations
are also divided into Boundary and Distant groupings. Boundary average
exposure rates ranged from a low of 0.28 mR/day at Monteview to a high of
0.34 mR/day at Atomic City. The overall Boundary average was 0.31 mR/day.
The Distant group had a high of 0.38 mR/day at the Rexburg CMS and a low of
0.25 mR/day at the Jackson, Wyoming location. The overall average Distant
value was also 0.31 mR/day. There was no statistical difference between
Boundary and Distant locations. Furthermore, all values are consistent with
past readings. Table 4 lists the range and average for both groups over a
six-month period. All results are listed in
Appendix C, Table C 11.Table 4. TLD Exposures from November 2001 to May 2003.
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Figure 14. TLD sampling locations. |
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