FALLOUT FROM NUCLEAR WEAPONS TESTS
1344.
°
APPENDIX
In the case of strontium elimination,
a.
the following assumptions were mada:
Tne population was returned to the contaminated atoll at time t = 0,
with a zero strontium body burden.
b.
The population absords a daily increment of x uc, and x ia considered
ney teatt eh!
TIT.
te be a constant independent of tim.
¢.
The amount of strontium excreted in the urine each day is given by
P(t} «= et), where R(t) ie the total excreted by all routes each day, and k is
a constant independent cf times.
d.
The body is considered to be a two compartment system, A and 53, whare
The excretion rates for each compartment are a and b days”?
sindlar assumpticns are made, except that only ore capartment ia assumed.
Mow:
a(t) ie total strontium bedy burden at time t in uc
8 (t) ami ot) are the portions in each compartment
a(t) = 6 (t) +6 (t)
1
2
Considering each campartment seperately and adding the resulte,
da
a
m Ax
-
B
(t}
it
=
Ax
-
EP
y(t)
=
Ax
.
aa,
hence
bt
8 i{t) = Ax
> (1-0)
z (2 - 078) antin 2 (t) wm
Since
E(t) = as
1
+ Be
2
oat
P(t) = ¢ (aa, i + vs)
eRetaaled EOE ets
apd
a
1
2
PRABS g nabeankil, ja ~
e.
eee
For cesium and zinc elimination
”
to the burden remaining in that compartment.
leet hampee
The portion of E(t) excreted from each cacpartment ia proportional
fe aoe een
respectively,
Rete RELY eb ot be
5
A+Be2i].