us m we ' ’ , OG ~~ oO J ‘ ib i" i? Do rt d "4 mu ha + oO w rm +2 nee ead! and medicaliy registered chlidren counted only in 1979. Table 29 summarizes the residence locations of all persons <ounted. Tables 30 and 31 break this data down by sex, age and registry status for the January 1979 and May 1979 field trips. Tables 32 through 39 provide individual counting dates and residence atoll or island at time of counting. Table 40 lists registry numbers, age, name, sex and last know location of individuals who have not been whole body counted since their departure from Bikini Atoll. DOSIMETRY The dose equivalent to Bixini Atoll residents during their residency period was the result of internal and external source. of radiation. In 1975, ex- ternal exposure measurements were performed (GR 79) at Bikini Atoll. Using these data and an estimate of the Marshaliese living pattern developed by Gudixsen (GU 76), an estimate of the mean yearly net exposure rate for adult males, adult females, adolescents and juveniles was developed and reported ina previous publication (GR 79). The net external dose equivalent for each individ- ual was determined as the product of the mean net exposure rate, the residency interval and a correction factor for radiological decay and is presented in Column 5 of Table 41. The dose equivalent commitment for bone marrow due to 90. has been calcu- lated for individuals from urine data reported in Tables 2 through 5. The symbols, constants and equations used are presented in Appendix B. The retro- spective dose equivalent was determined using several assumptions. First, per-~ sons returning to Bikini Atoll returned with an initial 90. body burden at baseline levels. Second, while residing on Bikini Atoll, to a constant and continuous uptake of 90 12 individuals were subjected “Sr through the ingestion pathway.