Oo -_ iw > . cr ct 2. a“ @ 0 ty 73 ct gy oO 3 s ct ye ct ta tae ja oO ie] ee oO $00] j++ Continuing Assessment of Radi oO 5. The @ose assessments reported in NVO-1450 are based upon Gata obt i tions are based uncn thesse during the 1972 survey. ce and long-term dose estimates are besed uron concentration factors deriv data without benefit of time-dependence tion. Also, both the from a limited deta base and from correlation analysis methods. With de obtained in this follcw-up research, we can eliminate much of the uncertainty in the initial dose estimates. continue to updéete both short-term and jJong-term dose We will therefore ery relevant information obtained assessments in the light of the critical and ve The usdavted assessments will be quite in the follow-up work described above. useful in develering plans for renabitaticns of northern islands, as well as Mest importantly, for land-use planning end for srecific egricultural blanning. it will fulfill the AEC committment to the Enewetak people, the Micronesian Legal Services, and the Trust Territory. 6. Ecolorical Ststems Model * QO oO u ct a3 ve es QO The data base of the 1971 Erewetex Survey is perneaps c radioeccological G2ava bese in existence. It vcrovides an cprortunity 7t a comprehensive ecosystem model of elemental flow, 2... and would have special nayerfr 3 : ~ O 3 . 235 value for comparative eveluations of OCs, 9Sr, 15?Cs, end “%pu. ryT present data bese adequetely cescribes the state of of the % system; com cnzoing and proposed DEER research will provide the kinetic information needed to describe transfer béiween compartments. Much of the researcn needed to aevelos fucn 2 model is already in vrosress or is prerosed in this 169. Tne Analysis ana Assessment Group, tne Marine Group, and the Terrestrial Beolesy Group will continue to intesrate tne new data, as it betomes available, into e@ systens model. In the process they will define areas where further research is needed. B. Bikini Atoll The tasks to be carried out at Bikini are es follows. 1. Sampling of Ave ileble Food Chain Products end Correcvonding Ssiis The major focd crops planted tive years ego on Bikini atoll provide a five-year head start for initial assessments as outlined under the objectives of the program. Banana end pavaya will be collected immediately for direct measurement of radicnuclide uptake. Corresponding soil sanples will be collected from the aree surrounding the root zone. These soil samples will be serursted into fractions so that we cen determine which soil component cantains the activity. The fraction of the total radionuclide inventory in the soil evailable to the plants will be determined by leaching studies, and appropricte concentration factors will be determined. As the coconut, pandanus fruit, end