TABLE 1.3 ESTIMATED RELATIVE DOSE AND DISTANCE OF DRIFT FOR FFP’S Time of Assumed of Cloud of Fallout min Duration mio During Est. Percent of FFP’s Moving Stated Exposure Distance or Less ft D, as Percent of Dy + Dy Vp = 0.3 Vp = 3.0 . , cm.’sec cm/sec Vo = 30 cm/sec pet pet pet pet 1 2 8 16 240 460 37 100 99.9 99.3 98.5 93.0 87.0 3 4 24 32 720 960 - 99.8 - 97.8 - 96.4 - 61.5 - 72.6 - 99.2 87.5 93.0 86.9 $7.1 39.8 5 6 8 40 48 64 1,200 1,440 1,920 58 79 10 20 a0 160 3,000 6,000 - 99.6 ~ - 42 fys Arrival FFP Movement