0018933
The sum of the nuclide fractions from the cloud and fallout should be one in
each case provided that the R-values used are representative of the cloud and fallou
as a whole.
This seems to be likely for the fallout where the R-values change only-
relatively slightly with time but more doubtful in the cloud due to the scatter of
the analytical results.
Table 3.9 gives a comparison between the deposited fraction.
(from Table 3.5) and airborne fractions (from Tables 3.2 and 3.8).
The agreement
is generally as good as could be expected considering the nature of the data.
In shot Koa the gas sauple data are very meager.
samples are not matched well in time and altitude.
The gas and particulate
It is believed that the No?9
fractions, and consequently the Sr?0 ana ¢si37 fractions, as calculated from the
sr89 and C5137 in the cloud and fallout are better values than those calculated
from Kr88,
For shot Walnut the late fallout results are limited and not interpretable in
obtaining the fraction airborne, hence only the gas sample data have been used.
These fallout data also lead to unreasonably large fractions deposited.
In shot Oak, both fallout and gas samples give similar values for the fractions
deposited and airborne.
The averages have been used.
Table 3.9
COMPARISON OF AIRBORNE AND DEPOSITED FRACTIONS
sr70
Fraction
Deposited
Fraction
Airborne
cs137
Total
Fraction
Fraction
Devosited
Airborne
Koa
0.66
0.13
0.79
0.48
0.56
Walnut
0.81
0.24
1.05
1.00
0.36
Oak
0.54
0.23
0.77
O.41
0.49
Total
1.04
"
1.36
0.90