Table § Total Body Equilibrium Dose Equivalent Rate per Unit Total Body Burden, x _ _ mRem yl ucia! 55K 26 2 x 10° 600, 6 x 10° 6575 1 x 107 90c, 3x 10° 1376, 55 2x 107 27 30 38 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. Figure 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 6520 body burden means for adults on Utirik and the observed dietary rate constant from Rongelap. [It was observed on Rongelap that -031% of © en was removed from the diet pathway each day in addition to radioaccive decay. Additionally, reduction in dietary radioactivity on Rongelap had been cbserved for 137, 8; 90 Sr and 6065 to be greater than that predicted by radioactive decay alone. Instantaneous reduction fractions very similar to 1?