Table 4. Cumulative (1979) dose equivalent summary (rem) for adults (classified as persons >16 years of age upon return to Utirik in June 1954 or to Rongelap in June 1957 and having a mean body mass >60 kg). Nuclide Utirik Rongelap Utirik Total-body 90sr 55Fe 137¢5 60¢9 657n Total internal Net external* Total 0.0118 0.0329 1.13 0.507 12.5 14.2 3.19 Thyroid 0.0267 0.000749 6.0230 1.71 0.0143 Net external* Total 0.123 0.0422 2.57 0.0177 0.103 2.86 22.8 4.88 3.19 Lower 90g y 5 5Fe 137¢5 60¢9 652n Total internal Net external* Total large 0.225 0.0666 0.591 4.66 15.0 20.5 3.19 23.7 2.02 0.0101 11.1 0.0672 13.1 3.19 3.87 0.0537 0.0603 1.70 0.629 17.2 19.6 0.0415 2.35 0.359 0.0757 2.47 2.02 16.3 Red marrow 90sy 35Fe 13765 60¢, 652n Total internal 0.00169 0.0594 1.55 1.85 2.02 17.4 Rongelap 4.49 Testes-ovaries 0.000749-0.000749 0.0583-0.0620 1.54-1.74 0.442-1.78 11.3-16.3 13.3-19.9 0.00169-0.0016 0.0736-0.0433 2.33-2.63 0.0125-0.0520 0.0685-0.0988 2.49-2.82 16.5-23.1 4.51-4.84 3.19 intestine wall 0.567 0.0465 0.895 0.132 0.0910 1.73 2.02 3.75 2.02 Liver 0.000671 0.00152 0.115 0.0804 1.81 0.792 16.5 19.2 2.74 0.0223 0.136 2.98 3.19 2.02 22.4 5.00 *A value of 0.73 rads in tissue of interest per roentgen measured in air act one meter above the surface was used to convert exposure in air to dose equivalent. The source was assumed to be exponential distribution of 137¢5 activity with depth in soil, typical of aged fallout (B.G. Bennett, Health Physics 19:757-67, 1970). Because of the multidirectional nature of the source, variation of dose with depth of organ is minimal. are adjusted for lifestyle variations (e.g., ete.). - 116 - standing, External doses sitting, fishing,