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