35000}
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Tr
T
T
T
T
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RONGELAP
T
T
T
4 946,000
£1 STANDARD
4 311,000
0
DEVIATION
¥ +1 STANDARD
® 30000
|
=
a 25000K
+ 676, 0
ERROR
a
> 20000}
4 541,000
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15000 b
4 405,000
r
100004
4 270,000
5000
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3
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Z
l
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1000 2000 3000 4000 5000 6000 7000 8000 9000 10000
TIME PAST REHABITATION, days
Figure 4.3 #1.
0
Adult cesium-137 body burden as a function of time
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; the
physiological half-life is 110 days in sen, 80 days in women, and
less in youths and children.
(1 Bequerel = 27 picocuries;
l nanocurie = 1,000 picocuries) The maintenance of the specific
activity of 1 pCi/g in soft tissue for 1 year gives rise to a dose
of .01 ren.
(Figure courtesy of E.T. Lessard, Brookhaven National Laboratory.)
34
Cs-137 BODY BURDEN, pCi
T