calculation indicated that about 50 percent of the activity was accounted for in the fallout
pattern.
3.3.3 Shot 2.
Bikini Atoll was not heavily contaminated after Shot 2, since the winds
carried mostof the activity toward the northwest. Some data were available from the
free-floating buoys, but they were not sufficient to produce reliable contours. The maximum reading observed at 35 miles from ground zero corresponded to a land reading of
Exposure Rate , r/he
Stohon 220.12 Dog
Tatel Expesure to
25 Hours «© 3735¢
Station 220.08 Oboe
Total Exposure to
20 Hours * (3360
Ot
to
10
20
(30
Time , Hours
Figure 3.6 Residual gamma rate versus time, Shot 1. Upper curve: Station 220.12
on Dog, 41,372 feet to ground zero. Lower curve: Station 220.08 on Oboe, 83,762
feet to ground zero.
435 r/hr extrapolated to H + 1 hour.
Rad-Safe readings on Sites Able and Charlie near
ground zero indicated readings of 4,700 r/hr and 1,100 r/hr, extrapolated to H + 1 hour.
The other islands received exposure rates of less than 25 r/hr at H + 1 hour.
3.3.4 Shot 3. The fallout pattern from Shot 3 was ideally located with respect to the
measurement stations. The shot was located on Site Tare, on the south edge of the atoll,
47