.
Table 5
Total Body Equilibrium Dose Equivalent Rate
per Unit Body Burden
I,
Se
mRem y~! pci7!
5556
2x 10°
6065
6 x 102
6575
1 x 102
905,
3 x 107
1376,
55
2x 102
26
27
30
38
Figure 15 illustrates the relative contribution to the composite dose
equivalent rate for each dosimetrically significant internally deposited nuclide.
For the average Rongelap adult, the residence interval begins June 1,
1957; however, many adults were reported to have resettled during the next 3 to
6 months (Co80b).
The composite dose equivalent rate indicated that a broad
maximum of approximately several hundred millirem per year persisted for several
hundred days.
Most of the dose rate is attributable to the 1376. component Ce-
sium dominated over the entire post return period and would be of prime concern
for populations returning to a contaminated environment years after a fission
type initiating event.
Figure 16 illustrates two possibilities for the Utirik dose equivalent
rate resulting from the 970 body burden history during the first three years
post-return.
The higher body burden resulted from use of the two measured ara
31