Cese-equivalent commitment is a function of body mass and radionuclide raAbsorbed fractions ere di
th
tt
moval rata constants.
and thus also erfect the dose.
Consequently,
arant
for the adult and child
it should not be surprising, thac
for equal body burdens, a child may receive a difference dose or dose race than
an adult due to different values
rate constants.
for Dody mass, absorbed fractions and removal
The higher daily activity ingestion rate was mot anticipated de-
cause it requires the infant to consume more 13765 activity than that ingested
by the adults and/or to consume substantially larger quantities of food.
Information concerning diet and living style patterns observed in the
Marshall Islands from the mid 1950's to the present (Na&l, Sn57, Mu54) indicates
two possible sources of
137
C3 in the infant diet: human milk and coconut
products.
This report examines the dose-equivalent, dose-equivalent vate, and
137
.
.
-
.
-_-
oy:
te
Cs Dodv burden for a hypothetical infant residing on 3ikini Atoll
from 1
September 1977 to 31 August 1978 whose principle diet consisted of these sources
of
137, s.
Dosimetric projections were determined from human milk collected dur-
ing May 1979, and from coconut tree sap and coconucs collected in April 1978. A
.
.
concentration factor relating adult
female
137_
i,
Cs body burdens
to
137
-
Cs activity
concentrations in human milk has been determined and is reported along with the
dosimetric information.
Limited coconut product samples from the Bikini Island camp area were collected in April 1978 (Figure 1).
These samples have been analyzed but consti-
.
.
137
.
tute a sample size large enough to accurately estimate the true mean
Cs activity concentration with only 70% confidence.
Addicional sampling of this food
source and an assessment of the quantity that an infant typically ingests are
hm
questions to be addressed in future field trips.