Table 5 Total Body Equilibrium Dose Equivalent Rate per ox Unit Total Body Burden, mRem yl uci! 336 2 x 10° 6005 27 6x 10° 6504 30 l x 102 90, 3x 10° 13706 2 x 10° 26 38 55 maximum of approximately several hundred millirem per year persisted for several hundred da‘s. component. The majority of the dose rate is attributable to the 1370. Cesium dominated over the entire post return period and would be of prime concern for populations returning to a contaminated environment years after a fission-type initiating event. Figuce 16 illustrates two possibilities for the Utirik body burden history during the first three years post return. The higher body burden resulted from use of the two measured 6300 body burden means for adults on Utirik and the observed dietary rate constant from Rongelap. It was observed on Rongelap that -031% of Gon was removed from the diet pathway each day in addition to radioaccive decay. Additionally, reduction in dietary radioactivity on Rongelap had been observed for 137, radioactive decay alone. S, 90 Sr and 6066 to be greater than that predicted by Instantaneous reduction fractions very similar to 17