constant (K,*0) was used for Zn, the dose equivalent rate for the average
adult was in excess of Federal Radiation Council Guidelines for the first 2
years following the return to Utirik.
Internal Dose Equivalents
Disintegrations occurring in the total body: of an individual during resi
dence following repatriation were determined by several methods.
Equation (3),
together with personal body—burden histories and atoll specific Kg Yate constants from Table 3, provided-an initial estimate of disintegrations between consecutive body burden measurements.
The second method used was a log-log plot vf
the subject's body burden history and an algebraic determination of area between
t-o consecutive measured points.
csunivet's body burden history.
The third method used.a linear plot of the
The area under the curve was cut and weighed and
commared to a standard weight of known srea,.
Quality control procedures
required that all three methods agree within £10% before a subject was assigied
his or her total body disintegrations during residence post return.
In gene:al,
the methods compared to within 15%.
After the total number of disintegrations occurring in a subject's body
was asSigned,
they were apportioned among the body organs according to the fui-
lowing equation
Fs
fo EAAB: (B5C;D, + Ind/r)
;
2 EAB +t In2/r)
orC.D,
’
(5)
y:
h’
"4it
where
F
= the fraction of total body disintegrations occurring in the organ of
*
:
interest,
A.
4
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i
.
= organ compartment deposition fraction for the element,
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