173 Acute and chronic intakes of fallout radionuclides @ S. L. SIMoNn ET AL. Table 8. (Continued) Utrik community Radionuclide Castle series Bravo Fe" St Sr ey BY SZyr °°Mo ‘BRU RU BimTe By OTe 1327 1337 135] BIC M0Ba MOFa Mpa Ce BCe Ce 3Ce 1.3 7.5 2.5 2.0 1.3 1.1 1.8 1.7 1.4 2.3 5.4 1.3 1.3 3.2 9.6 6.6 4.3 2.3 1.6 2.1 1.9 1.4 4.1 23°NIp? x X X X < X x x x X x X X x X X < X X X x x X Rongelap Island community 107! 10! 107! 10° 10° 10? 10° 107! 10! 10° 10° 10° 10° 10° 10° 107! 10° 10° 10° 10° 10° 10! 10° 1.3 8.3 2.7 2.1 1.3 1.1 1.9 1.8 1.6 2.4 5.9 1.4 1.4 3.4 1.0 7.3 4.6 2.6 1.6 2.2 1.9 1.5 4.2 1.1 x 104 x x x X x X x x < X x x x X x X X X X X x x X 107! 10! 107! 10? 10° 10? 10° 107! 10! 10° 10° 10° 10° 10° 10° 107! 10? 10° 10° 10? 10° 10! 10? 1.1 x 104 Total 1.3 x 8.4 x 2.8 x 2.1 X 1.3 Xx 1.1 Xx 1.9 x 8.8 x 1.6 X 2.5 X 5.9 X 1.4 x 1.4 x 3.4 X 1.0 X 74x 4.7 X 2.6 X 1.6 X 2.2 X 1.9 x 1.5 xX 42x 107! 10! 107! 10° 10° 10° 10° 107! 10! 10° 10° 10° 10° 10° 10° 107! 10° 10° 10° 10° 10° 10! 10° 1.1 X 104 intakes were obtained as sums of estimated annual intakes. Results of estimation of cumulative intakes by Majuro residents, Kwajalein residents, the Utrik community, and the Rongelap Island community are presented in Table 9. The cumulative intakes of long-lived radionuclides had roughly the same geographic pattern (in Castle series Bravo 1.1 6.2 1.6 6.9 5.3 1.0 2.0 1.1 8.9 2.5 3.6 9.9 1.0 4.4 6.1 3.1 3.2 5.7 6.7 1.2 2.7 1.2 4.8 x X x xX X x x x x X X x x x x x X X x x x X x 10° 10° 10° 104 10° 10° 10* 10° 10! 10° 10° 10° 10* 104 10° 10° 107 10° 10° 10° 10° 10° 104 1.1 6.2 1.6 6.9 5.3 1.0 2.0 1.1 9.0 2.5 3.6 9.9 1.0 4.4 6.1 3.2 3.2 5.8 6.7 1.2 2.7 1.2 4.8 1.3 x 10° x X x X x x x x x X X x x x X x X X X x x X x Total 10° 107 10° 104 10° 10° 10* 10° 10! 10° 10° 10° 10* 10* 10° 10° 10° 10° 10° 10° 10° 10° 10* 1.3 x 10° 1.1 6.3 1.6 6.9 5.3 1.0 2.0 5.1 9.1 2.5 3.7 9.9 1.0 4.4 6.1 3.2 3.2 5.9 6.7 1.2 2.7 1.2 4.8 x 10° X 10° X 10° x 10° x 10° x 10° x 10* x 10° xX 10! X 10° X 10° x 10° x 104 x 104 X 10° x 10° X10 X 10° X 10° x 10° x 10° X 10° x 10* 1.3 x 10° chronic intakes were muchgreater than the acute intakes of the same radionuclides. This phenomenonis a result of the relatively long residence times of certain radionculides in the environment. For example, at Majuro, the acute intake of *’Sr by adults from all tests was 0.022 kBg (Table 8) compared to the chronic intake of 0.081 kBg (Table 9), indicating chronic intake was close to four terms of relative intakes between atolls) as for the acute times greater. Even more indicative of differences in intake according to the modeof intake wasthe difference intakes. For example, adults on Majuro would have had about 3% and 2% of the chronic '’’Cs intakes of those for '°’Cs. At Majuro, the acute intake of '°’Cs by adults experienced by Utrik and Rongelap community mem- from all tests was 0.064 kBq compared to the chronic intake of 18 kBq, indicating chronic intake was more than 280 times greater than the acute intake. In the case bers, respectively. While the geographic pattern of chronic uptakes among atolls was similar to that for acute intakes, the Table 9. Estimated cumulative chronic intakes (kKBq) of the long-lived radionuclides considered in this study by representative adults of four population groups from the Bravotest (1 March 1954), the Castle (1954)series that includes the Bravo test, and over all tests considered. All values rounded to twosignificant digits. Majuro residents Kwajalein residents Utrik community Rongelap Island community Radionuclide Bravo test Castle series Total overall tests Bravo test Castle series Total overall tests Bravo test Castle series Total overall tests Bravo test Castle series Total overall tests Re Co 7 Str BIC 4.2 0.50 27 0.015 3.3 20 2.3 120 0.068 16 23 2.7 150 0.081 18 2.1 0.26 14 0.0075 1.7 26 3.1 170 0.092 21 40 4.9 250 0.14 31 1,600 46 4,300 0.94 460 1,800 53 5,100 1.2 620 1,900 55 5,300 1.3 640 1,900 32 230 3.9 540 2,300 38 280 5.8 1,020 2,300 42 490 5.9 1,040