from the Bikini people. patterns also allow us These to extrapolate other reasonable patterns. Note as the external dose assessment is concerned, cases 5 and 6 are identical. Because the expected living patterns that the cases also include assump- are most likely to differ between tions on the food production and the various age groups, consumption plans of tion data has been compiled (Table 2). population. This the returning information is age distribu- These data were obtained from the 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, The cases are based upon the The also 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, Plan.? necessary, For purposes of this report, it is for the purpose of the the cases are primarily directed external dose calculations, 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. on Bikini Tsland were obtained by The to The mean 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 uniform, Thus, cases 2 through 4 assume the residences the mean exposure rates were chosen are situated along the lagoon road by inspection of Fig. on Bikini Island (areas 1 and 2 in the survey did not include the other Fig. islands of 7), while cases 5 and 6 assume 5. Because the atoll, we had to the people will live within the rely on data from previous surveys interior to estimate how much of portions of the shown as area 3 in Fig. island, 7. As far the total population dose was contributed by