-44.
Table 4.
-
DRAE
Estimated integral whole-body external gamma doses for the first
year and for 30 years.
Values include contributions due to
natural background radiation of about 0.027 rem for a first~-year
dose and 0.80 rem for a 30-year dose.
For comparison, the federal
radiation guide (total of external and internal doses) is 0.5 rem
per year for individuals and 5 rem for 30 years for a population
average.
These guides are in excess of natural background.
‘
Estimated doses (rem)
Case
1
_
Description
Village on Eneu Island
2
' Residence in houses already constructed
along lagoon road on Bikini Island.
3
Residence in houses already constructed
along lagoon road on Bikini Island with
following remedial actions taken:
4
5.
6
First year
30 year
0.12
2.9
0.20
4.3
a.
Placing 5 cm of gravel around houses
0.18
4.1
b.
Removing and replacing top 20 cm of
soil around houses
.
0.18°
4.0
Residence in Phase IT houses constructed
along lagoon road within area 2 of Fig. 7
with following remedial actions taken:
a.
Placing 5 cm of gravel around houses
0.22"
4.8°
b.
Removing and replacing top 20 cm of
soil around houses
0.20%
4k
Residence in Phase II houses constructed
within the interior of Bikini Island
0.28
5.9
Residence in Phase [I houses constructed
0.28
5.9
‘within the interior of Bikini Island
“The exposure rates in the immediate vicinity of the houses have been
reduced by a factor of two and eight for remedial actions a and b, respectively.
However, we have estimated that only 35 to 40% of the Bikinian's time will be
Spent in the vicinity of his house; therefore, the reduction in total dose is
relatively small because the total dose includes the exposure received from
the areas where he spends the other 60 to 65% of his time.
ian a