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FALLOUT FROM NUCLEAR WEAPONS TESTS
1335
Miller ottained an effective half-time of 110 days for the elimination of
zn, and for the two subjects from Utirik the urinary to fecal excretion ratio
was 1/9.
Asauming the excretion to be entirely exponential and 1C percent of the
body burden of mn65 excreted in urine,
the March 1958 urinary excretion levels
of 174 end 342 micromicrocuries indicete body burden, equiliprium body burden,
|
and daily intake as follows:
‘
RONGELAP
1954 Exposed Group
Control Group (Unexposed 1954)
Body Burden (March 1958):
260 muc (+ 494)
540 mec (+ 903)
Equilibrated Body Burden:
330 muc
650 muc
Daily Intake:
2100 wuc/doy
100 uuc/day
Percent Equilitration:
85.0 percent
83.0 percent
ae ne
ws
The mean body burden estimated fron 19598 excretion analysis for all Rongelep
subjects showed a ten-fold increase over the 1957 whole body measurements.
This
increase correlates with the return of these people to Rongelap atoll from
Majuro.
Also the 1958 Rongelap mn©? burdens are comparable with the Utirik
subjects in 1957,
and the Utirik subjects vould have been in equilibrium in
1957 (half time of 110 days for the elimination of zine®?),
The estimated intake of zinc 3 {2000 to hooO wue per day) can not be
accounted for by zn) activity levels reported in foodstuffs.
Although thts
radio-nuclide reportedly accounts for a lerge fraction of the total activity in
fish,
this amounts ta only about six uuc per pound of muscle up ta 75 uuc per
pound of whole fish (2) or at most four percent of the estimated intake.
CONCLUSIONS .
Since resettlement of the Marshallese people on Rongelap atoll in July 1957,
the urinary excretion level of cestunt 37 has increased about 140 fold and about
# Assuming 100 percent absorption Cran tne OF Tract
od
‘