-9-
events were chosen because the fallout documentation was adequate to
reasonibly determine the exposure rate-distance curves and the fallout
fractions.
Their yields ranged from 1 te 92 tons, fallout fractions a
factor of about 3, and tower heights from 25 to 72 feet.
Fallout hodograph
shears ranged from about 2° to 30°, mean wind speeds from 2 to 29 knots,
and initial cloud tops from about 2900 to 9400 feet.
The normalized
exposure rate-distance curves are shown in Figure lywhere
the maximum
separation between any two curves is seen to be a factor of about 2.2 at
one mile downwind, with less separation at all greater distances.
Normalized exposure rate-distance curves for the four excavation experiments,
Jonnnie Boy, Sedan, Teapot Ess, and Danny Boy are shown in Figure 2.
The
range in totai yield of those detonations was a factor of about 240 and
the range in fallout fraction was a factor of about 13.
Observed wind
speeds, shears, and cloud heights, as expressed in the scaling equations,
also varied considerably.
The separation between the normalized curves is
a factor of about 3 at shorter distances, decreasing with increasing distance
to a factor of about 1.8 at 120 miles downwind.
Only two cases of ventings of underground @tonations designed for complete
containment aré available which are reasonable analogues.
Pike and Pinstripe everits.
Both ventings were of short duration and had
rather similar early-time cloud rises.
Yields, as well as fallout fractions,
differed by about one order of magnitude.
we STM END
tn.
4
similar.
These are the
Shears and mean wind speeds were
The normalized exposure-distance curves for these two events are
shown in Figure 3.
A maximum separation between the two curves is a factor
of about 2.6 at a downwind distance of 80 miles, however, the separation