1346.
II.
FALLOUT FROM NUCLEAR WEAPONS TESTS
In the case of cesiwm and zine:
*
:
s(t) =a (2 -o ®t) 4 8, gat
x is the daily accretion in uc/day, and 8, is the body burden in uc at t = 0.
”
x
# =-as +X 5 -8 iajeot +a(l- ety] +x
= -E(t) + x
‘
x
xP(t) = E(t) = a fe** +a Ql - ety
M= lin s(t) = x
F
t —» 00
zine??
a = 6.3.x 10°? days") (t1/2 = 110 days)
k = 10
BF 0.03 ue
Cesium? 37
a= k.€ x 1073 days") (t1/2 = 150 days)
B=
So
k= lf
06
#The urinary/fecal ratio of rediocesium for human subjects is about 5/1, so that
~
eetimates of body burden are too low by about 20 percent.
A-3
NU Relee