from the Bikini people. These as the external dose assessment is patterns also allow us to extrapolate concerned, cases 5 and 6 are identical. other reasonable patterns. Because the expected living patterns Note that the cases also include assump~ are most likely to differ between tions on the food production and the various age groups, age distribu- consumption plans of the returning tion data has been compiled (Table 2). population. These data were obtained from the This information is only required for the internal dose 1974 census taken on Kili Island assessment via the specific food of the 784 persons who claim land chains, and hence is not pertinent rights on Bikini Island.> to the external dose calculations. geographical living patterns, also The cases are based upon the The . shown in Table 2, were assumed to be™ assumption that the people will similar to those expected for the reside on either Bikini or Eneu returning Enewetak people. | Island in accordance with the Even though the gamma-ray Preliminary Bikini Atoll Master exposure rates vary widely, it is Plan.” necessary, for the purpose of the For purposes of this report, the cases are primarily directed external dose calculations, to toward assessing the external dose derive the most reasonable values of associated with various options for the mean exposure rates for each housing locations on the two islands. specific geographical area under The first case is based on the consideration (Table 3). assumption that the people will exposure rates for specific areas live only on Eneu Island. The The mean ‘on Bikini Island were obtained by remaining cases assume residence weighting the mean exposure rates on Bikini Island at different within each contour interval (Fig. village sites with various remedial 4) by the area within the contour. actions being taken to reduce the Since the exposure rates on Eneu exposure rates. Island are relatively uniforn, Thus, cases 2 through 4 assume the residences the mean exposure rates were chosen are situated along the lagoon road by inspection of Fig. 5. on Bikini Island (areas 1 and 2 in the survey did not include the other Fig. 7), while cases 5 and 6 assume islands of the atoll, we had to the people will live within the rely on data from previous surveys interior portions of the island, to estimate how much of the total shown as area 3 in Fig. population dose was contributed by 7. As far ~16— Because