ge
winter shots. The same holds for a number of other fission products and
suggests an excellent wey to conduct nuclear tests with a ninimm of exposure to the population.
In additicn to all of the Limitations described in the last 2 paregraphe@ of the preceding section on air beta concentration,
one must add
uncertainties in the direction of fallout and its rete of descent.
Meteorological trajectories
(for constant altitude) are available for the
tests in 1953 @) | 19570 ) and 1962 (3) but what we really need are the
upper-air fallout (U.F.) trajectories which predict the deposition of
fallout along the ground.
Thyroid dose estimates from fission yields are given in Table 4.
Table &
YEAR
THYR
OF1951
TESTS
ES
F
F ISS [ON
KILOTON YIELD
31
APR
1952
1953
1985
—~
1987
64
2§2
se
34
1958
1962 —
$7
?
. AV. YINBANT
DOSE
0.%
1.6
6.3
2.0
8.6*
1.4
1.0
These estimates oould be recesputed independently if the yields
of the five tests of July. 1962 were released.
yielde
The sum of their fiasion*
<te-be: "less than” 118 rstetons ©), but how wuch Less,
a
“aatiete-worth (which way not be much), Table 4 pre-
tone
flasion yield during July 1962. ‘There my be
‘gpsons for withholding this inforwation.
* The 8.6 red dose for 1957 was estimated from the enlculated 1.0 red dose
for 1962 and the air beta cencentrutions for 1962 & 1967 (eee Table 2).
® Dunning states that about 1099) k41Lotons of fission was relanéed pricr to
1959 at the Nevada test site
The total Ejreton + fusion) yield for
Neveda tests prior to 1959 was 1036 kilotone
fission.
Thus virtually all was