$
946,000
41 STANDARD
DEVIATION
30000
811,000
Z— ti STANDARD
,
25000
#
ERROR
676,000
541,000
20000
405,000
]
15000
lO000 F
270,000
5000F
135,000
1960
BB
1000 2000 3000 4000 5000 6000 7000 8000 900 0 10000
4
3
li
I
a
0
TIME PAST REHABITATION, days
Figure 4.3 #1.
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 men, 80 days in women, and
less in youths and children. {1 Bequerel = 27 picocuries;
1 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 .0l1 ren.
(Figure courtesy of E.T. Lessard, Brookhaven National Laboratory.)
TO00b HI
34
Cs-137 BODY BURDEN, pCi
é
RONGELAP
35000
Cs-137 BODY BURDEN, Bq
’
6
'
t
q
t