Table 5. External 30-year doses for each age group.* Infants and Case Children and small children adolescents Men Women 1 2.7 2.7 3.1 3.1 2 3.9 4.2 4.5 4.5 3a 3.7 4.0 4.4 4.4 3b 3.5 3.9 4.4 4.2 4a 4.6 4.7 4.9 5.1 4b 4.0 4.3 4.7 4.6 5 6.0 5.8 5.6 6.1 6 6.0 5.8 5.6 6.1 Fail units are in rem. Commission on Radiological Protection. guide value and about 70% of the While these guidance values for 30-year guide value. exposures of individuals and of little margin for additional population groups are not a radiation doses that may be poten- dividing line between safety and tially received by intake of danger, any exposures approaching radionuclides via groundwater and these guides are cause for careful various food chains. evaluation of the situation, and from Table 4 that residents in exposures exceeding the guides would houses built within the interior require consideration of remedial of Bikini Island will receive measures to reduce exposures and 30-year external radiation doses bring them within the guidelines. exceeding the guide value. This leaves It is clear As mentioned earlier, these Inhabitants in the existing houses on Bikini Island are expected to external doses may be enhanced by the receive external whole-body presence of beta rays emanating from radiation exposures that are beta emitters such as 905, - 90y approximately 40% of the annual activities in the soil. ~21- It appears