associated with rainfall and wini pe
ers along a broad
in the came general ta' ule -
£
/
Wana”
Wake
-2 crizin
they refer to delayed fallout of material which has puined cntcry
into the stratosphere,
It is slow with en average stcraze time
in the stratosphere of 10 years, plus or minus five years,
LEC
believes the latter figure - five years - is the more likely,
This delayed fallout tends to distribute itself more or less
uniformly over the surface of the earth over the years.
They state that "at present, the amount of Sr 90 in the
stratosphere from nuclear weapons tests is far too small to
approach meximum permissible concentraticn even if it were all
deposited now,"
They urged a continuing program to check on
the amount of radioactivity in the stratosphere as necessary so
that if
there were to be a greatly inereased rate of thermo-
nuclear weapons testing activities we would know at the earliest
moment when 1t was time to slow dcwn in terms of potential
hazard from Sr 90 to man,
There is also a discussion of the radioactivity from
fallout of the intermediate and delayed variety,
They point
out that it is usually too feeble to measure with a hand monitor
- that air sampling does not give precise results as the amount
of the passing air does not bear a direct relationship to what
falls on the ground,
The best measurs of the actual feli Oue
available te date are laboretory anal 3is of fallout cn gusmsd
rezer, in collecting pots,
end ectsal
sanelysis of the soil
There is a discussion of etrmosp..aric radiocenteninacic
6 2bcult of uncentrolled pellarta ef :
.¢:leles cuch as veliic-
kiypten end redioiodine frem pover re
tors and procersing >
~
.
Sones
=
=
-*
we-tScees 5 row
Cone
is
esseanticl.
.
owes welsaca ch fir:
ro
L
ocl
a
ae
"Ss
4
Troy peins out that continucd ccntrol