Draft-For Discussion Purposes Only BECK: jgg 7/29/73 : Preliminary Estimates for Dose to Eniwetok Population from External Exposure 1. Table I gives the age and sex breakdown of the 432 people expected to return to Eniwetok based on Tobin’ s census. Note that almost (/5sre-under-19years ofnoe. o: 2. Table II gives suggested models for living patterns based on Tobin's report and the announceddesires of the Eniwetok people to utilize the entire atoll. Case Tb differs from case Ia in that more time is allotted to temporarilyresiding on islands other than Engebi (JANET) while less time is spent in the Engebi village area. Case Ib probably represents an upper ‘limit exposure with regards to any large group of people. Case IV is typical of the least exposed population. 3. Table III gives the dose rates used for the present calculation. ‘These are based on the TLD data (LiF, primarily) using the E.G. and G.¥ data mainly_as an indication ofwhether the TLDdata are representative: Roemeralee Rwtem we A eters > RettTB ogy AI ee eae Ae for,larger. areas. While the exposure rates on all ‘the northern islands have a wide range, the values given in Table III are thoughtto be toapee (oonserataglaverageValue’ cos eee 162Matchcientiyea consistent with our evaluation of the validity of the various dose rate measurements made. They do not represent the highest exposures found in each of the locales. In fact, many of the northern islands interiors had exposure rates in some places of several hundred yR/h. Considering the wide range 7 from island to island and the variation across a given island from ©