Table 5. External 30-year doses for each age group. Case smail children Infants and Children and 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 "SAL 4b 4.0 4.3 4.7 4.6 3 6.0 5.8 5.6 (661 6 6.0 5.8 5.6 6.1 | a . All units are in ren. 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. Inhabitants in the existing houses : This. leaves It is clear As mentioned earlier, these 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 904, - 90, approximataly 49% af che annual activities in the soil. -21- It appears