for the intake.
Rongelap Island.
Table 9 presents the activity intake of selected nuclides at
An adult male was assumed to take in 93 yCi of I-131 in order
to correspond to urine data.
Activity. intake with meals was modified by body
weight for the other members of the population.
This modification was based on
an exponential relationship between total element intake and body weight derived
from data tabulated in Reference Man. (ICRP74).
Ingestion of activity directly with meals at Utirik Island would
have resulted during breakfast,
lunch and dinner on March 2,
1954 due to fallout
dusting plates and food preparation areas and food itself throughout the early
morning hours and all day.
As mentioned previously, fallout particles were not
visible to the eye at Utirik Island (0C68).
Also, fallout activity was measured
in cisterns even though cisterns were covered, indicating BRAVO dust may have
entered food not just by direct deposition alone.
Essentially all of the BRAVO
activity fell during the eating of breakfast and during breakfast food
preparation (see Fig. 6).
Assuming the same food eating and preparation areas
as at Rongelap, and the same family size, then about 30 mg of BRAVO dust was
ingested with the breakfast meal at 24 hours post detonation.
Dust ingested
with lunch and evening meals was not considered in the estimate.
Resuspension
followed by redeposition was considered secondary to direct deposition prior to
and during breakfast.
At Sifo Island, the majority of fallout fell for one hour, a
mid-morning hour between the breakfast and lunch times.
Assuming the same food
preparation area as at Rongelap Island, but no deposition on plates during the
eating of lunch, values for intake were estimated and recorded in Table 9.
Approximatey 60 mg of BRAVO dust were assumed to be ingested at 5.5 hours post
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