3.
Use ot film badge dara at Rongerik to quantify the fallouc building curveupslope and downslope, and to extrapolate this information to Rongelap and
Ucirik.
4.
Determine the &/y ratio and thus evaluate the contribdtion ot B dese in
estimating the y depth dose; for example, the 8 activity dose due to
Neptunium-239.
5.
Plot all the available data on external radiation and determine decay factors.
The question to be raised will be: Do the data resplt in a curve similar to
the estinates T7!-5 relationship, or does it exhibit different values, such
as T70-83, T-1.2 due to weathering or other factors?
Examine the question on internal dose estimations from, urine analysis,
food ingestion,
inhalation and data from animal studies.
In thig precess all
available intormation on diet and lifestyle would be compiled wo’as to derive
realistic dose estimates from external and internal sources.
7.
Examine other studies done elsewhere on ws thyroid nodules, for example; che
Chicago Group Study, and also the use of
1291 to determine the early thyroid
doses. Historic samples collected soon after fallout will be used in determining the 129] concentrations.
In addition, 99Tc would also be determined since
it is known to be retained in che Shyroid gland.
If possible, excised thyroid
glands would also be studied for 127 concentrations.
8.
Use a "stace-of-the-art" computer simulation program to determine the transport
and deposition of radioactive fallout following the BRAVO test.
should give:
This study
a.
plots of integrated air concentration isopleths for fission products
b.
deposition isopleths for the aforementioned fission products, plus
c.
time plots of the buildup and decline of airborne fallout concentrations near sea level at the points of interest, and/or the building
of ground deposited fallout.
lodine, cesium and strontium
239np/239Pu 1f possible, and
Status of Study:
l.
External Radiation Measurement
a.
Figure 1 shows a plot of the gamma dose rate in roentgens per
hour at three feet above ground at 24 hours after the BRAVO test
explosion. Figure 2 shows the estimated total dose contours in
roentgens at 96 hours after the BRAVO test explosion indicating
175 rads of whole body gamma radiation for the Rongelap inhabitants
and 14 rads for che Uririk inhabitants.
In view of these observations,
an exhaustive search of all reports generated Tables 2 and 3 for
Rongelap and Utirik respectively.
This data has been plotted in
Figures 3 and 4. These plots will be further examined when results
from Item 8 above will be received.