176 Health Physics August 2010, Volume 99, Number 2 Table 10. Cumulative radiation absorbed doses (mGy) to four organs of representative persons by birth year (<1931 to 1958) from acute intakesoffallout (all values rounded to two significant digits). Doses for Utrik and Rongelap Island communities account for relocations. Dose in year of tests is birth-cohort averaged dose (BCAD). Majuro residents Kwajalein residents Birth year RBM Thyroid Stomach Colon RBM Thyroid Stomach Colon <1931 1931 1932 1933 1934 1935 1936 1937 1938 1939 1940 1941 1942 1943 1944 1945 1946 1947 1948 1949 1950 1951 1952 1953 1954 1955 1956 1957 1958 0.11 0.11 0.11 0.11 0.11 0.11 0.11 0.16 0.16 0.16 0.16 0.16 0.13 0.13 0.13 0.13 0.13 0.11 0.11 0.11 0.11 0.11 0.16 0.13 0.12 0.012 0.019 0.0021 0.0030 22 22 22 22 22 23 23 28 28 29 29 29 30 30 30 31 31 40 40 Al 42 42 55 49 20 4.3 3.2 0.68 0.37 0.32 0.32 0.32 0.32 0.32 0.33 0.33 0.37 0.37 0.37 0.37 0.37 0.36 0.36 0.36 0.37 0.37 0.41 0.41 0.41 0.43 0.43 0.60 0.54 0.17 0.047 0.027 0.0067 0.0025 4.4 4.4 4.4 4.4 4.4 4.4 4.4 4.8 4.8 4.8 4.9 4.9 5.6 5.6 5.7 5.7 3.7 6.3 6.3 6.3 6.6 6.6 8.6 8.3 1.6 0.74 0.24 0.11 0.021 0.25 0.27 0.27 0.27 0.27 0.27 0.26 0.34 0.34 0.34 0.34 0.34 0.29 0.29 0.29 0.29 0.30 0.27 0.27 0.20 0.20 0.20 0.28 0.25 0.24 0.024 0.035 0.0028 0.0042 66 70 70 70 70 71 71 85 85 86 86 94 96 96 96 98 110 130 120 99 100 100 130 130 64 9.8 6.9 0.91 0.50 1.1 1.1 1.1 1.1 1.1 1.1 1.1 1.2 1.2 1.2 1.2 1.3 1.3 1.3 1.3 1.3 1.4 1.5 1.3 1.1 1.1 1.1 1.6 1.5 0.63 0.11 0.061 0.0081 0.0031 12 12 12 12 12 13 13 14 14 14 14 15 16 16 16 16 18 20 15 14 14 14 19 19 4.2 1.7 0.44 0.13 0.026 Island community, '*’Cs was the most important contrib- utor to the chronic dose, whereas ®’Zn was the largest contributor to dose for the Kwajalein residents, the Majuro residents, and the Utrik community. DISCUSSION Comparison of estimated intakes and doses to other on Lessard et al. (1985) and in this work on the same bioassay data (Harris 1954), the estimates are close. Differences in estimated intakes for '*'I are a result of different assumptions on the TOIs and the excretion fraction on the day of sampling which must be derived from a specific biokinetic model. For the populations on Rongelap and Ailinginae, our estimates of intake of '"'I published values There are few estimates in the literature of radiation were similar to those of Lessard et al. (1985), though (1984, 1985) reported on chronic intakes and doses, and intakes of radionuclides other than '*'I (Table 16) are due were about three times greater than those suggested by doses to the Marshallese from nucleartesting that can be compared to the estimates provided here. Lessard etal. Goetz et al. (1987) for Rongerik (Table 16; also see Table 6, Harris et al. 2010). Differences in estimates of acute intakes and doses, respectively; however, both reports only apply to the Rongelap and Utrik populations and the acute doses were only from the Bravotest. Goetz et al. (1987) reported on acute exposures to the military weather observers on Rongerik exposed to Bravofallout. Nopublications knownto us have reported acute intakes and doses or chronic intakes and doses for population on atolls other than Rongelap and Utrik. For this reason, the comparisons that can be made with literature data are very limited. to differences in the assumed TOI and in the yield of Because the intake estimates for ‘I and other short-lived radioiodines and radiotelluriums were based other nuclides relative to '’I. As discussed, we used ratios of nuclides from the work of Hicks (1984) with small adjustments for fractionation. In terms of estimated doses, at Rongelap and Ailin- ginae, our estimates (Table 17) of absorbed dose to the thyroid from acute intake of '°'I from Bravo were similar to those of Lessard et al. (1985), but about four times greater for Rongerik compared to those reported by Goetz et al. (1987). Small differences could have been due to a variety of factors, e.g., the dose conversion coefficients. In our case, the dose conversion coefficients