be RATS wd
fin : Re
8,
F.
ELeny
EUSTECT a
(U) Torld-Vieg Conte feition
1, Yuring the 2A8Te°UTTIIS oonfercnesa of June 1953 snd January 1954,
‘To clreureed vith you the pesettility tht 75 to O5f of the total residual
activity of curfece Wurst weepong would he desoeited feacdiately éouneind
(within 209 toe 300 ell«s dozini) 6 to 18 hours after beab detonation.
The events of 2 “arch 1994 (CASILT-B24¥0 Ehot) hive proved the existence
of lerge concentrations of residual activity doworint,
For this reseon
fellout Peog CLSTLPehlave Phot in tho aa 2h hours,
feo inclored a8i¢
I hove tacca tha trouble of enslyaing fa detell the parcontege domavind
Seport,
CL-234576 for Jotaile,
€
2. I Uslfeve tiot this fact nis a distinct bearing on the validity of
HUECHINE eczunptloaa of the Strortica 99 turten Lzpored by explosions of —
nuclear teecont. In Table I, I heve listed oll of the knoun explosione of:
atonle reapees to dete, Then I bave acoused thst for teser shota (15 to 50%T
poo
resiteal eotivity Le sesvoaged out fa
fn Hy
ros 3%) ft tevers) 10 to 30% of the
Re ort).
3.
ta rt
teveral houss vy thes scil, and hensa fa rot avasllsula for world wide dictrle
ution, <isllerly, I hsve essunsd thst for 254T excloted froaa 100 ft
torsr, 564 of setivity is senvenjed out by tha soll. Yor surface shots, it .
ds egret that €03 ts soflescavenced oat ant tharsfsre tnavellable for
gofld
C sida contirination.
“a (Proof of these aseuzziicas nro in tho inclesed
(Qaim
In the Chicago taby axperinents (resorted by you ia tha Janury
1954 conference) you sieved that new bora babies In the Chicago ares have
evoub 1/6 COU UNS Unit of £r90 or about 1/6000 of tolerance, Cn the basis
of the orieing] Cull iTsZ estirste of en even dletritution of 25,000 kT of
debris to bring the world populetica up toe talerence, 427 would give the
Chicecza bables ths obrerved deposition, Since these experiseats were cone
eluted in 1953, it is sesusod thet, foo 4 (er TE Jre I) detonated in dncast
1953 244 not edd to tha Orburcen of the Chicase tables, Table I ahcsa.
that although a totel of 9,48T seve datsrated by 1952, only a saxisua of
2.72? were aveilstle for world site contealnation,
It is ay contonticn |
thet only 1.74 of even as low as 1,54 #T wore ayalisble for U.S. deposition
(ees lest two columns of Table I). Even if this is sot true,and only the
sixiaua volue of 2,727 is used, 1t fe et4ll less than the Z¥T found by your
expcritcnt in the chicsgo bubles,
It should be further polated ont thst by
the cnt of 1983, erly 592 cf the avallevle atssscherle atoule debria had
reachod tioi ground. If tite La trus then zo cely kad 2.7/24F (or even as
low a3 1.55/27) available for the Chicaso babics, nd yet thelist uptake
gag 48f Ly DUES estinabes, Tha conclusion is inevitable thet the Std.
-
{lilt estisstes sre sot conservative as popularly believed in many quartors,
fo ths esatrary CUA ALn% unlerecticcted the Creo becard. Yahy people have
essessi (iat the fUc
TILE overesticctes the €r99 uptske by fectora of 10
peven 33, Tha etatergat da eleo nude thet the Chicago taby upteke of
Er) eas cob turcugh the plentessicslezan cycle, bub thet the Piseion pro-
ducts sere picked up by the anics] (cov) directly froa fallout thet exe
ternslly ccvered plect life, eni tils rae than pse-o1 on to the notkera of
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