exposure rates by a factor of two.
On the basis of
these data,
expect to receive first-year and
30-year integral doses of 0.2 and
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
Remedial
These values would increase
combined by "folding in'' the present
(the next group to be built) were
population distribution.
constructed within area 2 of Fig. 7
The effect
of radioactive decay was included in
(cases 4a and 4b)
the calculation;
higher gamma exposure rates
however,
the
because of 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,
these
Table 5 lists the dose variations
cases are only approximations of
between the various age groups for
the expected Living patterns,
each case.
and
Because the adults are
the results should be regarded
expected
accordingly.
fraction of their time within the
doses,
The minimum external.
as we might expect, may be
to spend a considerable
interior of Bikini Island as well
realized by living on Eneu Island.
as on other islands,
Estimated values,
levels are slightly higher than
background,
including natural
are 0.12 rem during the
their dose
those of the children.
The relative
First year and 2.9 rem over 30
differences,
years.
to be somewhat overestimated
A significant fraction of
however,
are expected
these values is due to exposure
because aging is not considered in
received while visiting other
the calculations.
islands having higher contamination
levels.
Future inhabitants of the
These doses may be compared with
the appropriate guide values,
piven
existing houses along the lagoon
in the title of Table 4, which are
road on Bikini Island
those set forth by
(case 2) may
the International,