-10is considerably smaller at all other distances. It aprenrs, from the foregoing examples, that the scaling technique performs reasonably well for a variety of types of nuclear detonations. Obviously, the accuracy of this prediction method, as well as any other fallout prediction method, depends ultimately on accurate predictions of input parameters. em ee. Some radiological data are available with which to examine the performance of the Knapp relationship for both the Pike and Pinstripe events. The downwind distance to the dairies were 85 miles in the cnse of Pike and 63 miles in the case of Pinstripe. In both instances the dairy cows were on green feed and the deposition was dry. Fallout data for both events have been analyzedand dose rate patterns for an H+l hour reference time were constructed using observed gamma decay rates. | These gamma dose rates at the locations where radioiodine was observed in cow's milk were used to determine the peak concentration of I-13] which would be predicted by means of the Knapp relationship. The results of this calculation are as follows: Event Maxinnm Concentrations (pci/1) | Pike Pinstripe Predicted Rance 174 to 630 3500 to 12,600 . Observed 420 4300 Application of the upper endof the range results in overestimates by a factor of 1.5 for Pike and 2.6 for Pinstripe. Application of the middle of the range still results in an overestimate by a factor of 1.7 for Pinstripe but only a 4% underestimate for Pike.