30
T
35000-|
T
TT
T
v
RONGELAP
—
|
3
>
a
5
a
m
'
'
4
DEVIATION
7
,
.
+1! STANDARD
Z x0000+
=
OF
TF +1 STANDARD
25000-
ERROR
Bh
S
=
+676 2
>
458] a
20000-
5
J
15000 F
a
2 10000
%
Ls
'
1T
§000 ,
0
49
1
°o
kt
o
i
Lg
+ IBS
9
L
mT
t
t
fm
1000 2000 3000 4000 5000 6000 7000 8000 9000 10000
TIME PAST REHABITATION, days
Figure 4.3 #1.
6
O
Adult cesium-137 body burden as a function of tike
since resettlement of Rongelap Island in 1957.
The maintenance of the body content depends on the radionuclide
intake from the diet. The physical half-life is 30 years;
fEhe
physiological half-life is 110 days in men, 80 days in women,
and
less in youths and children.
(1 Bequerel = 27 picocuries:
1 nanocurie = 1,000 picocuries) The maintenance of the speaific
activity of 1 pCi/g in soft tissue for 1 year gives rise to
dose
of .01 ren.
(Figure courtesy of E.T. Lessard, Brookhaven National Labor tory.)