ere e
FLLL=OUT PLOT;
‘FORSCAST
ay ie
ag
aN)
‘
,
.
ork
-
o
(5) Starting from ground tero ‘and going’“out 15"bo 20 miles.‘onthe
fiLl-cut plot of the 125 micron particle, draw cn area of approximately 150 to
:
The lino bounding this orca has a valuc of from onc fifth te
couerc milese
4
°
ne tenth of the value obtained by Equation 1. If the winds aloft are low in
erecd (5 to 20 knots) then this arca will be highly conteminateds If the winds
ricYt are stronger (30 to 80 knots) then this arca will bo smaller and not as
nigi:ly conteminated.
(6)
In theevent that the tropopause is lower than 35,000 ft. msl,
tne fall-out will bo somewhat grcator than indicatcd above and the time of falle
cub of the maximum contomination will be tivo hours or lcss for a 10 to 40 KT
tccer
shote If the tropopause is above 42,000 fte msl, the fcll-out will be lcss
en "indicated, and the timo of fall-out of the maximum contanination will bo three
hours or more after H-houre
(7)
.
Normally the moximun fall-out arce will be in «a radius of from
“3 to 4) miles from ground zero, dep: nding upon the dircction and specd of the
:
cleft. If the winds aloft are relatively low in speed (10 to 20 knots) tho
L-.ut in the immcdinte vicinity of ground zero will be groatcr end the "dishe
‘ad “missile” frll-out within 10 to 20 miles of ground zcro will be much
.fe6
Theroforo .t NPG, In the event of a 10 to 30 KT 300 ft. towcr shot,
“ine will bc most likely to get conteminstcd with a 2 to 10 rountgen
rated infinity cose if the winds cre from the South, Sa or Vicst and work.
vent that the wind specd aloft is high (40 to 80 knots) then the meximum
In
fl -ut sroa will threaton towns such as Tonopah, Celicnte, Pioche, Franca,
CUrystsl, Hikoy /1-mo, Ste George, ote. The towns mentioned above may reecive
5 to 30 roentgen intcgrated infinity deseo from a 15 to 40 KT, 300 ft. tower
The most inportant factor in reducing intcnsity of fell-out is cnguler
" "Scare If the winds aloft arc modcrate tostrong and the shear is lerge
(vi to 180°), thon the fall-out will be mininel, sinec the contamination will be
sprvcd over a larger Arce Ely, U:veda {s Resarared 170 niles from ground
gvve, Reneo {4 cLll rot come under the reticun fallen
It will recoivo fren
° org 2 reentron int carated Infinity dose, Eonerars nly; Nevada will probably
ws? ive two or three such doses in view of the prevailing winds abt NPG.
¢
(8) Tho following exrmgle will be worked out in detail to illustrate
roecduro6utlincd stove. Wind informetion obtcincd at 0330 FST, 24 Merch 1955
2 height estimctod at 43,000 ft. msl, tropopause hcight, 40,000 fs equivalent
m $0 to 40Ate
Livel
wind Dircetion
and Spcod
2 ne eee conned
120°/05 knots
15,300
29,799
22,000
Blythe
25,009
49,009
Ls
Multiplicrtion
Factor
Ve.
1409/14
“fe
240°/26
260°/36
1/6
180°/16
196°/14
200°/14
210°/10
210°/12 °
220°/18
230°/27
230°/27
-
fe “Ve
_ fe
Ye
1/6
1/4
1/3
1/3
_
.
Veighted Wind Specd
end Dircetion
120°/d. 8
1400/26 3
—, . .
180°/267
ee" 1909/23
' ("200°/2.8
oo * 210°/167
220°/2
220°/467
2300/8 e+
230° /8el
2400/43
This
os the maximum fall-out et 42 miles from ground zore on « betring ot 32%
The -pxinum “‘Antcgrated dosrnge is, fron Equetion 1,
&
Qo
a
=
WAY
( 20-14 -1)2% 30 roontgens
~
$0 r Srtcgr tid SRE OED |of mexirum falleouts
eo et
ro
.
|
oh