_
3)
oo.
— 1m
res
Estimates of Theoretically Fossible Vpyrcid Doses
Due_to Short-Rance Foellout From the Nevada Test site
‘AS Bhown above it ifs possible to calculate, from local
méasurecents of ganna and deta ratiation, what radiation
exposure to a child's thyréid night theoretically result from
a givén deposit of fallout.
Since the AEC has reported
numerous measurements of gamma and beta radiation, together
with the times of measurement, and their relation to a
|
particular nuclear explosion (the time of which is also given),
these data can be converted to estimates of nossible iodine
131 exposures to the thyroid
according to the procedures
outlinedabove, and given in detail in the Appendix.
suca
calculations have been made for 189 different readings at
various locations following 31 different nuclear test shots
condueted at the Nevada Test Site during the period 19521958. ~The overall results are presented in Tables I-V.
_
In each case, two estimates of the possiblethyroid dose have
been calculated, using the two different observations Cvindscale and Garner) described above.
‘The lower of the two” a
estimates yields thyroid dosages which range from 0.6 rad
to 555rads. The higher of the two estimates yields thyroid
dosages which range fron 4 rads to 2760 rads.
accor ing to
the higher’ estimate, of ‘the separate locations, 50
received -
sufficient fallout toresult in a possible dose of 100 rads
or more to the thyroid.
In 1S cases even the lower estimate
yielded'a thyroid dose over 100 rads.
It is evident from this
summary that the Nevada tests have produced instances of