It.is not appropriate to comoare the results from the various
tests without first considering the time periods between tests.
For example, fallout from Bravo was not masked by later debris for
about a month in the region of tests, and could be identified for
an even longer period in regions remote from the test site. On
the other hand, Union debris was quickly overshadowed by fallout
“
from Yankee, which occurred nine days later.
The world-wide distribution of fallout from Bravo is shown in
Figures 3.3 and 3.4.
Assigned to the burst was 311 fallout from
the period from February 28 to Avril 5, 195h, with the exception
of debris in a limited area which was determined to be from Romeo
(See Appendix A),
The average activity of this fallout, corrected
to 100 days after burst, was 1937 d/m/ft2, for a total fallout of
4.79 megacuries, or 3.7 megacuries as of July 1, 195k.
Figures 3.5 and 3.6 show the total Romeo fallout from the time
of the bursts through May 3, 195h. The ,world-wide average activity
at 100 days after burst was 1LL5 d/m/ft° for a total of 3.57 megacuries, or 3.71 megacuries on July 1.
the third burst, Koon.
No debris was assigned to
Fallout from Union (Figures 3.7 and 3.8) covers the veriod
through May 12, a somewhat shorter nceriod than the first two bursts,
Since Yankee was detonated only nine days after Union.
The world-wide
average fallout was 28) d/m/ft at 100 days after burst for a total
of 0.70 megscuries, or 1.13 megacuries on duly l.
Yankee cumulative results are given in Figures 3.9 and 3.10.
Debris was specifically attributed to this burst through May 21.
However, much of the fallout which occurred beyond this period also
originated from Yankee so that the total fallout is undoubtedly
;
much greater than the values given. Through May 21. Yankee fallout
averaged 1219 d/m/ft°, for a total of 3.01 megacuries at 100 days
after burst. Corrected to July 1, 195, this value becomes 5.78
megacuries.
Nectar fallout is shown in Figure 3.11.
Since this ourst
followed
fankee burst by only nine days, debris from
Nectar is identifiable as such only for a few days and in the region
near the test area. ,This fallout from Nectar amounts to a world-wics2
average of 81 d/m/ft*, or 0.20 megacuries, at 100 days after burst,
0.47 megacuries on July 1, 195).
- 22 -
.