The main contribution to the population rather than grow them locally, the ex- dose comes through the terrestrial food pected 30-yr bone dose would be reduced pathway, followed in decreasing order of from 80 to 25 rem and the whble-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 breadfrutit, obtain the same results by removal of Percentage contributions to the 30-yr 905, and '3c5-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 shown in 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 pamma 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 that a 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 havea direct influence on the population doses from these fruits. If agricultural island, and living pattern. 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. Percentage of total 30-yr ter- restrial food dose to a population engaged in agriculture on JANET. Food 905, dose to bone, % Ilo dose to whole body, To Domestic meat 17 26 Pandanus fruit 40 35 Breadfruit 34 29 Wild birds 0,005 | 0.003 could be expected from these actions for a population living on JANET, . The island of YVONNE presents a unique hazard on Enewetak Atoll. 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 milligram-size pieces of plutonium metal, Coconut meat 6 9 Coconut milk 0.9 1 as well as smaller pieces which are physically indistinguishable in size from the ~