‘
.
\
oe.
_
of
.
+
°
5S eH yn ee A ey
(
.
\
4
) (Ry /0.1) (290) sa-Bauation b BY
Ps (2x10 sett vn
.
ate
Where’
,
-
7sz
ae
‘
-
ve
.-
“
:
a
Ry = Dose rate in r/ne in area A bounded by infinity dose Line D, and .
_. -
ot
“8
where the dose rate within the area has been extrapolated back to tl
at
Atl hours ning. the. a
but by EquationayRe
‘therefore
Ps
.
woth
_ -
nen
Pee..,
. ‘
aTBP Sy:
3 = 20° yo
SS
“0 y
.
on
:
|
a
.
ue.
:
as oDsk ae a savetion5 wl
So
sta ey -us
aneoe : woe
-
-
eo
e
..
-
wl a
.
gy
os
”
D £2
(3 x 198) (100 4 D)
FR
5A" *Y
oy
orgiation.”
rahe.
(
.
;
«t
wa WS
.
:
Equation 1 was “ised to prepare the values‘given in ‘Table Ve. tt choula be- a. neue
.*
noted that the last column of Table V gives the total H+l' hour percentage “of *
. the bomb activity deposited on the ground by fall-out (FA ye. The percentages
-given in the tables are not significant beyond oo
Lop
oe
he,
ne
two Figurees onTe _
3
.
i
wl ~ nad gets
Eos
4
*
C.
3
‘It is ‘possible: toestimate the ‘amount of sand and ‘soil debris ‘sucked: =
“up into the mushroom of the atomic cloud from a knowledge of the value of P, - ~
and by a knowledge of the average specific activity of the soil particles clea!
in the atomic cloud, If it is assumed that the average specific ggrua ray
activity of the fall-out particles is between 1 x 10°“ and 2 x 10° nicrocuries®
- at Hl hours then it can be shown that the oumber of radioactive particles ‘1
deposited on‘the ‘ground in the fall-out area
ais given by. the followings .
3 x10°PER
(100) (1.5 x 10°“e y~
ba a oP
' ave
|
if it ts ‘assumed that all‘ofthy
particles. are 125 microns in_diageter, spheric
and have a densityof 2.6 ga/cm?, then the amount of sand,in grams, mixed into |
the mushroom of the atonie cloud’ of a 200 Ete towerr shot is_Etven bye cote, *~
8. a:x
sol 3 y2
PL --oo --- we ee ~.t tet
7. ce
This means“that
«
aprroxtuatety 6.7 xF 1910 ga of sand and soil debris. was aixed ;
with the mushroom of shot No. 5 and 2,3 x 1010 gm. of sand wes mixed in shot.
No. 7 cloud .of T/S. This represents from 25, 000 to71000tons, of. sand nixed