,. BUDGET TITLE Dose Reassessment for Rongelap and Utirik CONTRACTOR NAME Associated Universities, 2of. I Inc. AND REPORTING HA-02-01-01-0 DATE PREPARED CODE I 03/31/80 I CODE BNL WP NUMBER TASK NO. REV. NO. o Technical Progress cont. ash” the fallout material that settled on the Japanese fishing vessel. These samples should provide the most accurate characterization of the fallout. Preliminary computer simulations of fallout transportation and deposition have been completed. Data analysis of the recent ’diet and life style study has been completed. Discussion with scientists and technical people who were involved with the BRAVO test is being continued. Analysis of the Marshallese teeth samples for Pu isotopes is in progress. Expected Progress in BY-2 (FY 1980). A final report on the diet and life style for the Marshallese will be completed. The computer simulation of fallout will also be COIIIleted. Thyroid glands from the exposed Marshallese will be analyzed for 99Tc and 1?? ‘I. AnalYsis of the “Bikini-ash” will be done as soon as we get an aliquot of the sample. It is also expected that data on the exposed Japanese fishermen will be made available at that time. Preliminary analysis of the data generated so far will be made using existing models. The results will be extrapolated to present times so as to test the validity of the models used. Expected Progress in BY-1 (1981). Final dose estimates to the exposed inhabitants of Utirik and Rongelap should be completed. The methodology developed will be extended to Likiap and other islands which were on the “fringe” of the fallout pattern. 2og. Future Accomplishments. The techniques and expertis~ developed in the course of this study could be used to reassess doses to population in other areas subjected to exposure from from occupational situations in the past. fallout or even those resulting 20h. Relationship to Other Projects. a. This study will help establish dose estimates from the time of the incfdent to the present, and will complement the aerial survey for external radiation measurements, over these islands, which has been completed. Together they should present a reliable picture of doses received by the populations and also enable dose estimates to be projected into the future. b. This study will be in close conjunction with the BNL Radiological Safety Program in the Marshall Islands (HA-02-01-02-0) and with related programs of the BNL Medical Department (HA-02-01-01-0). Continued collaboration with the University of Washington, Laboratory of Radiation Ecology, and the Battelle Pacific Northwest Laboratory will be maintained in the area of sample analysis and data interpretation.