Project Number ~Battelle Pacific Northwest Internal Distribution Laboratories --- ,4%1 e)LB s.. April 5, 1979 Dale J. Solciat and E. C. Watson To Subject Can you give me a quick idea about how much effort would be required to calculate the radiation dose (whole body, bone and lung to people who might return to live on an island in the Enewetak Atoll? The following are known: 1. Constituents of diet 2. Levels of ‘OSr, ‘37CS, 241Am and 239Pu in soil 3. Radionuclide contents of foodstuffs grown in soil of known radionuclide levels at Bikini. Since there are no data available on food grown at Enewetak, levels in food will have to be calculate as follows: Radionuclides Radionuclides 4. in Bikini Food in Bikini Soil Assumptions about Resuspension, = Radionuclides Radionuclides in Enewetak Food in Enewetak Soil etc. We would probably want to calculate annual and 30-year doses if the people moved back in 1980 and possibly in 1990 or some other given time in the future. Livermore is actually doing this dose calculation. However, since so much is riding on these dose estimates, we on the Enewetak Advisory Group have It is possible recommended that the Livermore calculations be verified. that two or three labs would be asked to do the verification. I don’t think it is necessary to make a major production of this. For one thing there won’t be time. We would probably have about two weeks--2nd or 3rd week in May. The Livermore calculation won’t be available until then. It might be possible to get the input data before then. If you could give me a quick idea about this by Friday pm, I would appreciate it since I need it for a trip to Wash. on Sunday. I’d also like to know whether you would be interested in doing this if DOE decides to go ahead. I don’t know how much money, if any, would be available, but I would assure that you don’t bear the cost. WJB:ms 34-1900-001 [3-711