9.8 + 0.5 x 10°
3
?
mCi/km”.
We eagerly
to adequately
await completion of the soil analyses
of
test
the applicability
this model in its present
form.
Dose Assessment
The 1O-,
30-,
S0-,
Bikini Atoll.
and 70-year
Samples collected dur-
integral doses are listed in Table 6
ing January 1977 will indicate whether
for consumption of Bikini cistern
the present dose assessment based
water and in Tables 7 and 8 for con-
upon observed concentrations in June
sumption of Bikini and Eneu ground-
1975 is acceptable or whether the
water,
1975 concentrations might have been
respectively.
The doses are
calculated using an average daily
higher than normal due to possible
intake of 2 litres of water and using
contamination resulting from the
a sum of the average radionuclide
initial drilling operations.
concentrations for the soluble and
The resuits for the 30-year inte-
particulate phases listed in Tables
gral dose in the tables can be used
2, 4, and 5.
for comparison and discussion.
We have further assumed
The
that the only loss of radionuclides
whole-body dose for all three water
from the water is due to radioactive
Sources is contributed almost entirely
decay.
by
If the water concentrations
L3fa
For both cistern and
increase with time relative to the
groundwater
1975 concentrations or if they
mately 4
decrease more rapidly
marrow dose than Malo, and both 90.
than assumed
Ose contributes approxi-
to 5 times more of
the bone-
{rom radioactive decay because of more
and Iolo. are approximately
rapid environmental turnover,
of magnitude more significant
then
239,240
the long-term integrated doses would
be affected accordingly.
port
than
Pu.
The 30-year integral doses pre-
Therefore,
the dynamics of radionuclide
two orders
trans-
dicted from consumption of Bikini
in the groundwater reservoirs
cistern water are 1.7 mrem for
the
and the mechanism of nuclide con-
whole body and 11
tamination in the cistern water must
marrow.
be understood before final Long-term
0.5 rem for a member of
dose evaluations can be made.
tion,
or 15 rem in 30 years.
Fore,
the whole-body and bone-marrow
As was previously mentioned,
we
mrem for
the bone
The annual federal puide is
the populaThere-
doses resulting from consumption
are continuing groundwater studies at
~18-