Cs,
equilibrium body burden M = lim s(t)
t
t)
s(t)
A
= (1
E
=
~
-—» 00
B
“bt
a7at
e78%)
4 Zz
5 (l-e bty,¥
A.B
M=x (=
+>)
-bt.
|
x
.
.
P(t) = % fA (2 - eo) +B (De)J = & (1 -Ae"** ~ pe“>*)
1.
y= % of equilibrim =
s(t)
M
A
.
B
sa(r-e™) 5 (1 - ey
A+B
a
Dd
A
2. s(t) = w(t) 2 (1 - en) 4 By - e7°*)
A(1 - e~9t) 4.5 (1 - enbt)
f.
kP(t)
ct
R
em
A(l = e78%) 4 BCL - e75%)
—
ill
x=
nz
£
3.
The following values for strontium metabolism were obtained from Supplement
No. 6 of the British Journal of Radiology:
A= te
B= 25
as 3.65 x 1073 days"!
kel
and
s
= 0
and bd = 1.73 x io7# days"!, corresponding to a
half-time of elimination of 190 and 4000 days respectively.
x = 0.6 x and x' is total daily intake.
At t = 270 days:
P(t) = 3.45 x 107° uc/day (195% Exposed Rongelap Subjects)
3.9 x 1076 uc/day (control Rongelap Subjects - Unexposed 1954)