B;
= organ compartment biological half time for the element,
C.
= total body compartment deposition fraction for the element,
D;
= total body compartment biological half time for the element,
£
= fraction of the element from blood to organ of reference.
Equation (5) applied where significant decay occurred at the deposil ion
site, and not during transit or re-transit to the organ of interest.
Valurs for
compartment deposition fractions and compartment half times were obtained {rom
Ki78.
Values for the reg#ining quentities were from ICRPS9.
.
{
ope
wee
:
The dose equivalents to a specific organ or the total body were determined
by using the source to target dose equivalent per unit cumulated'‘activity parame-.
be?
ters from Ki78. The total. target dose equivalent was obtained by summation of
the dosimetric contributigps from all source organs.
Several important mod' Lica=
tions to the general procedure werg made in order to compute, individual
dosimetric results.
For gach person, the source to target dose’ equivalent per
unit cumulated activity was weighted by the ratio of a standard man's body wass
relative to the actual mean body mass during the interyal for which the dose
equivalent was determined,
In the case of 13766, the long term biological]
.e-
body mass (Mi8l).
Appropriate modifications to Eq. (2), (3), and (5) were sade
to reflect this dependence.
Finally, for 905, deposition in bone, 28% of tie
source to target dose equivalent per unit cumulated activity was assumed [iin
cancellaus bene and 72% from cortical bone.
Figure 18 demonstrates the mean dose equivalent from 137¢, for varicis age
and sex groupings.
tion.
The residence interval was from 1957 to 1980 for this ,..,.ula-
The adolescents and persons above 50 years of age in 1957 maintaine:! rhe
lowest dose equivalent.
Persons who died during this period were not inclined
37
“y
-
em
gy
:
.
ok
meeteae
° leBubSewn wren late eee = HS
moval rate constant for the Marshallese population was highly dependence upon