10 years, i.e., 1989, the maximum annual bone marrow dose will be approximately 500 mRem/Yr. Clearly, the most important factors influencing dose estimates are the source of food eaten by the Eneu residents, the degree to which imported food is available and used, and time spent elsewhere in the Atoll. In addition to evaluating the radiological conditions on Eneu Island, there are other considerations which must be taken into account in making the decision on whether or not people should return to Eneu now. 1. Exposure to radiation is believed to involve some risk of ill effects, therefore, unnecessary radiation exposure should be kept as low as is reasonably achievable. 2. The practicality and reliability of applying administrative controls intended to limit exposure. 3. The marketability for copra produced from coconuts on Bikini and Eneu Islands. grown