30-year cumulative dose (Eneu, .27 rem; Bikini, 3.5 rem) (6) is relatively
further below the standard (5 rem) than the initial annual one.
Although the above external dose estimates are quite adequate for
planning, it is to be noted that specific beta-ray exposure measurements at
ground level
(0-10 cm above surface)
have not been published
for Bikini.
The Committee is therefore recommending that such measurements
be made to
make the estimates complete.
3.2
Internal Dosage:
Food
Food consumption
not
clear
what
(Appendix D).
the
is
the
Bikinians
primary determinant of dose,
will
eat
when
they
resettle
but
Bikini
it
is
Atoll
The Lawrence Livermore Laboratory team has assumed that the
dietary estimates made by a Micronesian Legal Services investigator in 1979
for
the
Enewetak
Bikini.
people,
then
living
on
Atoll,
would
apply
to
The estimate were made for conditions under which imported foods
might or might not be available.
For practical reasons the committee uses
a "planning diet" which assumes that local
that
Ujelang
imports
are
available
75
percent
produce is always available and
of the year.
The local
produce
includes coconut, some pork and chicken, pandanus and breadfruit, and fish.
Very important
imports
are
rice, flour and sugar as well
as canned meats
and fish.
Knowing the composition of the diet and the average radionuclide
content
of
the
various
foods
in
it,
the
daily
intake
strontium-90 can be estimated in pCi/day per person.
of the diet to remain constant,
the 30-year dose
calculated
initial
by
multiplying
the
(e.g.,
of
cesium-137
Assuming the nature
in rem
1987)
(whole-body)
daily
intake
cesium-137 by the conversion factor .00045 rem/pCi (Appendix D).
to
bone
marrow
will
be
about
7
percent
consumption.
9000023
-
greater
and
owing
to
is
of
The dose
strontium-90