*o5/-
soll-water cycling and the associated cycling and availability of
radionuclides to plants Is essentia! for accurate dose assessments and
estimates of the potential long-term use of the atolls.
Additionally,
we will conclude the analysis of the coconut of] and dried pulp and
develop a final dose assessment during FY 1979.
Enewetak Atoll!
We will maintain the test gardens of the long-term subsistence
crops (pandanus, coconut, and breadfrult). These plants are being
fertilized as part of our experiment and they appear to be growling much
more rapidly than the unfertilized plants. Therefore, we may be able
to harvest the edible products from these crops during FY 1979 and
determine uptake and concentration factors for the fruits.
In
addition, we will continue to sample and analyze the coconut and
pandanus trees on Belle, Clara, Irene, Janet, Sally, and Tilda Islands
to determine the residence times of 137¢5, 9bsp) and plutonium in the
atoll! ecosystem.
We also will field either the Initial or the follow-up
resuspension study on Engebi Island. Continued sampling of soil
moisture, water cycling, radionuclide concentrations in soil, humus,
litter, and canopy as well as the measurement of micrometeorolocical
parameters at Engebi tstand will provide the necessary input to
thoroughly evaluate the controlling mechanisms of radionuclide
transport and cycling in the atolls.
18.
EXPECTED RESULTS IN FY 1980:
We should have sufficient data, even from the long-term crops, to
develop a genera! model for predicting doses from other islands and
atolls that do not now support subsistence crops but which may in the
specific options for remedial action can be proposed and evaluated.
19.
MAJOR MATERIALS, EQUIPMENT, AND SUBCONTRACT ITEMS:
vO ZO
We also will complete a general evaluation of the resuspension
pathway and of the potential dose due to the transuranic radionuclides.
By FY 31980, there should be sufficient data available to develop a
model of radionuclide cycting In the atoll ecosystem so that more
IN wa
future.
FY 1980
Aerosol particle analyzer (2)
Data logger/microprocessor (2)
Wescor soil psychrometer (2)
Tape transcriber
$26 ,000
6,000
2,400
600
$ 6,000
2,400
600
tf
FY 1979
tA
Equipment
8 O8e
Estimated Cost