rate from the equation. This method yields n-1 estimates of Ky where n was the number of data points. An average value of K, was assigned for each nu- clide, and the results for the Rongelap and Utirik populations are given in Table 3. For the evaluation of Ke from Eq. 1 and 2, radiological and physiological parameters were obtained from the open literature (ICRP59, ICRP68, ICRP69, ICRP79, Ki78). A representative sample of these parameters is presented in Table 4. Table 3 Summary of Dietary Rate Constants (K., a7) 60,, 90, 65,0 1370 Rongelap Adults Males 1.5x107> —-1.8x107% 3.1x107° 14x107 Females 1.6x107> 4.1x10 4 3.5x10> 14x10" 1.5x10 > 1.9x10 + 3.1x10 > 14x10" Adults Utirik Adults Males N.D. 4.6x10 Females N.D. Adults N.D. -4 -4 N.D. 1.4x10 4.0x10¢ N.D. 1.4x10° 4.2x10~¢ N.D. 1.4x10~" N.D. = No data sufficient for analysis. The values of K, were similar for males and females and for residents of Rongelap and Utirik. For 305, on Rongelap a factor of 2 difference between Ke values was observed for males and females. The female parameter for Rongelap Atoll compares with that obtained from the Utirik data. A paired t-test of the Rongelap male and female data indicates that the male/female difference was highly probable and therefore not significant. LS This difference leads to a