The main contribution to the population dose comes through the terrestrial food rather than grow them locally, the expected 30-yr bone dose would be reduced pathway, followed in decreasing order of from 80 to 25 rem and the whole-body significance by the external gamma dose, dose from 11 to 6,5 rem. marine, and inhalation pathways, would be obtained if uncontaminated soil In the Similar results terrestrial food pathway, the main con- were imported to JANET for the estab- tribution to both whole-body and bone lishment of these plants, dose is due to pandanus and breadfruit. obtain the same results by removal of Percentage contributions to the 30-yr 30 Sr- and 13%o5-contaminated soil from integral dose for each of the terrestrial JANET would require denuding of the food items for a population engaged in entire island because of the relatively agriculture on JANET are shownin uniform distribution of these isotopes Table B. over the land surface. Corrective actions to reduce popula- Attempts to Significant reduction of the external tion doses will be most beneficial if they gamma dose may be achieved by placing are directed at the primary contributors, a 2-in, layer of clean gravel in the vil- i.e€., pandanus and breadfruit in the diet lage areas and by plowing the agricultural and external gamma dose in the residence areas, areas. these procedures reduces the expected Since neither pandanus nor bread- fruit are now growing on the Atoll in sufficient amounts to provide a significant On JANET, for example, use of 30-yr external dose from 4,0 to 1.7 rem. Thus, from Table A it is clear thata dietary component, control of the location very broad range of population doses may and manner in which they are reestab- be expected, depending on village island, lished will have a direct influence on the agricultural island, and living pattern. population doses from these fruits. If It is equally clear that substantial reduc-~- their growth were limited to the southern tions of the higher doses can be achieved islands, for example, and the population through relatively simple modification of living on JANET were to import them the agricultural practices and of the soil, Table C summarizes the reduction that Table B. could be expected from these actions for Percentage of total 30-yr terrestrial food dose to a population engaged in agriculture on JANET. 905. dose Food to bone, % a population living on JANET, The island of YVONNE presents a unique hazard on Enewetak Atoll, Sigg dose to whole body, % Domestic meat 17 26 Pandanus fruit 40 35 Breadfruit 34 29 Wild birds 0,005 0.003 Pure plutonium particles are present on or close to the ground surface, randomly scattered in "hot spots” over most of the area from the tower to CACTUS crater. Examination of these "hot spots" has Bird eggs 0.05 0.002 revealed the presence of occasional Arrowroot 2 0,3 Coconut meat 6 9 milligram-size pieces of plutonium metal, Coconut milk 0,9 ] as well as smaller pieces which are physically indistinguishable in size from the . I-2