The main contribution to the population
dose comes through the terrestrial food
rather than grow them locally, the expected 30-yr bone dose would be reduced
pathway, followed in decreasing order of
from 80 to 25 rem and the whole-body
significance by the external gamma dose,
dose from 11 to 6,5 rem.
marine, and inhalation pathways,
would be obtained if uncontaminated soil
In the
Similar results
terrestrial food pathway, the main con-
were imported to JANET for the estab-
tribution to both whole-body and bone
lishment of these plants,
dose is due to pandanus and breadfruit.
obtain the same results by removal of
Percentage contributions to the 30-yr
30 Sr- and 13%o5-contaminated soil from
integral dose for each of the terrestrial
JANET would require denuding of the
food items for a population engaged in
entire island because of the relatively
agriculture on JANET are shownin
uniform distribution of these isotopes
Table B.
over the land surface.
Corrective actions to reduce popula-
Attempts to
Significant reduction of the external
tion doses will be most beneficial if they
gamma dose may be achieved by placing
are directed at the primary contributors,
a 2-in, layer of clean gravel in the vil-
i.e€., pandanus and breadfruit in the diet
lage areas and by plowing the agricultural
and external gamma dose in the residence
areas,
areas.
these procedures reduces the expected
Since neither pandanus nor bread-
fruit are now growing on the Atoll in sufficient amounts to provide a significant
On JANET, for example, use of
30-yr external dose from 4,0 to 1.7 rem.
Thus, from Table A it is clear thata
dietary component, control of the location
very broad range of population doses may
and manner in which they are reestab-
be expected, depending on village island,
lished will have a direct influence on the
agricultural island, and living pattern.
population doses from these fruits.
If
It
is equally clear that substantial reduc-~-
their growth were limited to the southern
tions of the higher doses can be achieved
islands, for example, and the population
through relatively simple modification of
living on JANET were to import them
the agricultural practices and of the soil,
Table C summarizes the reduction that
Table B.
could be expected from these actions for
Percentage of total 30-yr terrestrial food dose to a population engaged in agriculture on
JANET.
905. dose
Food
to bone,
%
a population living on JANET,
The island of YVONNE presents a
unique hazard on Enewetak Atoll,
Sigg dose
to whole body,
%
Domestic meat
17
26
Pandanus fruit
40
35
Breadfruit
34
29
Wild birds
0,005
0.003
Pure
plutonium particles are present on or
close to the ground surface, randomly
scattered in "hot spots” over most of the
area from the tower to CACTUS crater.
Examination of these "hot spots" has
Bird eggs
0.05
0.002
revealed the presence of occasional
Arrowroot
2
0,3
Coconut meat
6
9
milligram-size pieces of plutonium metal,
Coconut milk
0,9
]
as well as smaller pieces which are physically indistinguishable in size from the
. I-2