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 31