Table 5.
Estimated integral whole-body, external gamma doses for the first yr
and for 30 yr.
Values include contributions resulting from natural
background radiation of about 0.027 rem for a first-yr dose and 0.80
rem for a 30-yr dose.
For comparison, the Federal radiation guideline
(total of external and internal doses)
is 0.5 rem/yr for indi-
viduals and 5 rem for 30 yr for a population average.
lines are in addition to natural background.
Pattern®
These guide-
Estimated
doses (rem)
First yr
30 yr
Description
1
Village on Eneu Island.
0.12
2.9
2
Residence in houses already constructed along
lagoon road on Bikini Island.
0.20
4.3
3
Residence in houses already constructed along
Placing 5 cm of gravel around houses,
o0.18°
4.1°
Removing and replacing top 20 cm of soil
around houses.
o,18°
4.0°
lagoon road on Bikini Island with the following
remedial actions taken:
a.
-b.
4
.
Residence in Phase II houses constructed along
lagoon road within Area 2 of Fig. 2 with the
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°
4.4
5
Residence in Phase II houses constructed within
the interior of Bikini Island.
0.28
5.9
b
Residence in Phase II houses constructed within
0.28
5.9
the interior of Bikini Island.
“See Table 2.
b
.
.
.
.
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 remainder of his time.
(Patterns 2, 3a, and 3b); the 30-yr
Island lead to the lowest external
doses (excluding natural background)
exposure doses.
for these pattems range from 3.2 to
0.093 rem and the integrated 30-yr
3.5 rem.
Living patterns on Eneu
5009963
The first-yr dose of
dose of 2.1] rem are nearly one-half
—-}3-