-
a
fission products in fallout, nemely S -ontium-90, they eteted
"there scens to be me roc ci
7 Ut dl
ce
oa Rte 3
human strontium burden of 1/10 of the per.issible yielding co
rep in a lifetime,..,.
Visible changes in the skeleton heve
been reported only after hundreds of icp «ere accumulated end
tumors only after 1500 or more,"
The permissible level referred
to ia that recommended by the NCRP for industrial workers,
The
Committee noted that although "some children have accumulated
a measurable amount of radioactive strontium in their bodies,
the amount is quite small--a thousandth of what is considered
a permissible dose,
The Committee corclused, "then, that
Strontium-90 is not a current threat, but if there were any
substantial increase in the rate of contamination in the
atmosphere, i6 could become one,"
Committee on Meteorological Aspects of Atomic Radiation
Chairman - Harry Wexler ~- U, S, Weather Sureau
In this part of the report there is the fullest discussion
of fallout from nuclear weapons,
They distinguish between
kiloton bursts when the cloud does not penetrate to the strato-~
sphere and megaton bursts where the cloud does,
They estimate
that with surface bursts, i.e,, where tne fireball touches the
ground 70-80% of the residual radioactivity falls out nearby,
1.@.e, with small weapons a few miles, «with larger ones up to
309 miles or more,
They emphasizs th.
2ase of
predicting suis
by
"ncoarby" fallout pattern 4 ter the fac: and the problem c "den
predicting its precise pattern prior t2 detonation,
They speak of intermeltiecs Teil.
encll particle size released
.
weicw t
3,
2.e., maverini c.
stvitescheres
ofournton Telle ovt within theese wots
’n the
era
oe.
1
2
<2