exposure rates by a factor of two.
expect to receive first-year and
30-year integral doses of 0.2 and
On the basis of these data,
we calculated the integral first-
4.3 rem respectively.
year and 30-year whole body external
actions (cases 3a and 3b) reduce the
gamma~ray doses for each age group
30-year values by a few tenths of
for each living pattern presented in
arem.
Table 1.
somewhat if the Phase II houses
The results were then
combined by "folding in" the present
population distribution.
Remedial
These values would increase
(the next group to be built) were
The effect
constructed within area 2 of Fig. 7
of radioactive decay was included in
(cases 4a and 4b) because of the
the calculation; however,
higher gamma exposure rates
the
additional reduction in exposure rates
measured in this area.
due to possible weathering,
other hand,
leaching,
If, on the
the Phase II houses were
or agricultural crop production
built within the interior of
processes was not included.
Bikini Island instead of along the
.
The results of these calculations
.Shores (cases 5 and 6) we would
and a comparison with appropriate
expect the external dose levels to
recommended guide values are given
increase to about 0.28 rem during the
in Table 4 for each case under
first year and 5.9 rem over 30 years.
consideration.
Of course,
Table 5 lists the dose variations
these
cases are only approximations of
between the various age groups for
the expected living patterns, and
each case.
the results should be regarded
expected to spend a- considerable
accordingly.
The minimum external
Because the adults are
‘fraction of their time within the
doses, as we might expect, may be
interior of Bikini Island as well
realized by living on Eneu Island.
as on other islands,
Estimated values,
levels are slightly higher than
including natural
their dose
background, are 0.12 rem during the
those of the children.
first year and 2.9 rem over 30
differences, however, are expected
years.
to be somewhat overestimated
A significant fraction of
The relative
these values is due to exposure
because aging is not considered in
received while visiting other
the calculations.
islands having higher contamination
levels.
These doses may be compared with
Future inhabitants of the
the appropriate guide values, given
existing houses along the lagoon
in the title of Table 4, which are
road on Bikini Island (case 2) may
those set forth by the International
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