intakes, the implication on excretion fraction on D+17 is considerable. For stable iodine, 6.4 x 107% is excreted on D+17, as deduced from ICRP-30, Part 1, and as used by Brookhaven. Application of the revision in Part 3 leads to a 9.3 x 107+ excretion on D+17. As the implied initial body burden is inversely proportional to this excretion fraction, the Brookhaven estimate is consequently overstated by 44 percent. Thus is explained the dominant difference between the Brookhaven and the present determinations of initial 1-131 body burden, per unit of activity excreted on D+17. 5.3 TOTAL DOSE The total dose to each organ is the sum of the external and internal dose contributions. For consideration of risk assessment, the long-term aspect of certain dose commitments must be included. However, the important contributions of internal dose to the total dose of the Rongerik personnel were only for organs in which the internal doseis rapidly accrued. Approximate total values are 230 rem to the thyroid, - 115 rem to the lowerlarge intestine wall, 85 rem to the upper large intestine wall, and about 40 to 50 rem to all other organs. 30 Kb