terrivorid! ana LINLErnaviunat Affairs U.S. Department of the Interior Washington, 0.C. 20240 Attached are the estimated radiation dose projections to the people of Bikini should they return to live on Bikini Island or on Eneu Island. The various scenarios (e.g., residence island, time spent on Bikini or Eneu Islands, diet, rotation times) were requested by Mr. Jonathan Weisgall in consultation both with you and with us. The table is self-explanatory. For example, should the people (a) return to reside on Eneu Island, (b) spend 10% of their time on Bikini Island (but eat no food from Bikini Island), and (c) consume a diet 50% of which consists of imported foods, the maximum annual dose to the bone marrow (the organ receiving the greatest amount of radiation) is estimated to be about 450 millirem per year, with a 30-year dose of 3000-3500 millirem. These values compare with U.S. radiation exposure limits of 500 millirem per year and 5000 millirem over 30 years, respectively. The dose levels in the table assume that the people would return to Bikini Atoll during 1981. Also, it is assumed that, except for the case in which residence is on Bikini Island, no food from Bikini Island will be eaten. These estimates are based upon the most recent analyses of data from Bikini Atoll which was obtained during the Northern Marshall Islands survey, as well as upon other information. We have no reason to believe that these estimated values will change, but should additional information become available which might significantly affect these estimates, you will immediately be informed. N ECI DOCUMENTDOES NOT CONTAI / G7 Reviewed wo Bbade? Date EV