te bet aes oe. tang}aayab MME oie GHB cag eb ga ete Ls miata. akephaient we SeuSt bereGBR MM i E. T. LESSARD er ai. Cs-t37 oT 5 ~ - 7 q a E q =z = ¢= oto e ~ a 4 RONGELAP MALES _ rn wen Lat _ > oo ue a _ — > a = a o = _ - -— sR -~ Ye wa on ~_ _ & el OF RR ~*~ TC ocd _ _ a ¢ 6 on > 888 — —- = = > : : 2 ~ ‘ ‘ O i oR o 2345 CO hobo: Lee ee 6rcf Nwre a on on 1D ec oO a iw FE a a = = tad ¢ 2 - > e a > z= ‘ iot- ee Oe eo De Mae oe Wt weno a a “* io3- a =e mn ~ 'e° oO ” 4107 x “ya: wm os \a = Ww 4102 2 oP = 5 e = —_= a wet aegee - ee AONGELAP -- ee + Zn-6F a - oT ant & a tee _ a eee 3 an POE % - Bou YS an . - x @ ac 7 g- 10e - @ 310° E i - eL g e316? e - f o4e- x a ic Ww a 4% = AIC sg a e z ™ > 1045 a _ - > - * —-—e8 Cs -t3 Fe be BC ——— Sr 80 4 , A yee ee . ~ a = I t rote Fe Se Wee RONGELAP FEMALES - 7c §21 TIME oF PAST REHABITATION, goys Fic. §. Body-purden historv for Rongelap adults. - 6¢ - AGE DURING 1957, yrs Fic 4. Dailyactivity ingestion rate for day of return to Rongelap Atoil. = _ daily fluid intake (Na80). Children and adolescents. however. were observed to receive a large portion of their daily fluid intake from two imported meals per day as part of the school ao ~ eer ee ae ' a ~ ale ~e aoe = = = - oe 7 = > = = for infants. and then again (in a fermented form! in adult life by males as a component of “ 7 “7 7“ ~ Tom — z awn “7 ~ 27 ~ ele a Ve — rn 7. = we ~ FE e = ye 2: = = xz ceo} ce ee at a oD - ape eee nnn TO on = = ~ al ge a = es = ob ne LAS Hoe Taye S267 Bre,e TAT TN ak tt na . Fic. 6. Bods-burden histors for Utrrk adults lunch program. Studies indicated that coconuts and coconut tree sap provided the major source of “Cs in the diet (Le80a: Mi80). Thus. the undulating shape of Fig. 4 reflected this vanation in the dietaryintake of '?’Cs-contaminated foods. Adult average values for activity ingestion rate on day of return were calculated for all nuclides. Results are listed in Table 4. This information, together with the estimate of& for the nuclide of interest. was used mm equation (2) to estimate adu't body-burden histories based on the assumption of declining continuous intake (see Figs. 5 and 6). The declining continuous intake equation (3) provided a smooth body-burden function for Rongelap and Utirik adults. The equation was a tool to provide retroactive body-burden estimates during the early years post-return to Utirik. Few direct measurements were made at this time. The data plotted in Fig. 6 for “Co and “Fe were derived from Rongelap measurements. Biological variation and errors in the col- lection and analysis of urine samples introduced larger errors in body-burden estimates than did direct whole-body counting. These variations can be observed in Fig. 5 where “Sr data vary widely from the theoretical curve. In contrast. the '’Cs data fit the curve closely. The method used to generate Figs. 5 and 6 was not chosen to minimize the weighted sum of squares of deviations of the body-burden estimates and measurements from thefitting function (equation (2)). Instead average values of k and P° were selected to represent all the bodyburden data. For Rongelap, the '’Cs body burdens varied from the fitted function by a