Doses from external irradiation @ A. BouviLLe Er AL. 153 Table 5. Population-weighted average external dose to adults of four groups of atolls and/or communities. Grouping is based on similar levels of deposition of total '’Cs (see Fig. 2 of Simon 2010a). Range in parentheses represents the minimum and maximum total external dose within the group of atolls or communities. All values rounded to two significant digits. Total external dose Atoll or population group through 1970 from all tests (mGy) Atolls Southern latitude Ailinglaplap, Arno, Aur, Ebon, Jaluit, Mid-latitude Maloelap, Mili, Namorik, Namu, Ujae Ailuk, Kwajalein, Likiep, Mejit Island, 8.8 Kili Island’, Lae, Lib Island, Majuro®, All 5.3-22 34 Ujelang®, Wotho, Wotje Utrik and atoll of relocation® Rongelap, Ailinginae, Rongerik, and atolls of relocation® Utrik community Rongelap Island/Ailinginae/ Rongerik evacuees Rangeof total external doses among atolls (mGy) 22-59 130 1,000 — 470—1,600 27 5.4-1,600 All “Primary residence location of Bikini community during test years. > Includes Majuro permanent residents and Rongelap control group. © Primary residence location of Enewetak community during testing years. ‘See Table 3 of Simonet al. (2010a) for atolls of relocation. Table 6. Whole-body absorbed doses (mGy) from externalirradiation cumulated from 1948 through 1970 for representative persons by birth year (1930 to 1958) (rounded to two significant digits). Doses for Utrik and Rongelap Island communities account “Zr —— 131) 100 for relocations. Whole-body dose from external irradiation (mGy) oO Birth year Majuro residents <1931 9.8 22 130 1,600 1,600 i 1932 1933 1934 9.8 9.8 9.8 22 22 22 130 130 130 1,600 1,600 1,600 g Fe ° 1935 1936 9.8 9.8 23 23 130 130 1,600 1,600 > 5 1938 1939 1940 9.8 10 10 23 23 23 130 130 150 1,600 1,600 1,600 o 1931 1937 1941 1942 1943 9.8 9.8 12 12 12 ids 1946 12 Kwajalein residents 22 23 26 26 26 266 Utrik community 130 130 150 150 150 130 150 Rongelap Island community 1,600 © © => 3 4 2 1,900 1,900 1,900 1900 1.900 10 ot 0.01 10° 10' 107 10° Hours 10° 10° 10° 1947 2 27 150 1.900 Fig. 6. Relative contribution (%) of selected radionuclides to the total exposure rate on the groundas a function of time (h) after the 1948 12 23 150 1,900 detonation. 1951 12 21 150 1,900 calculated as deposition estimates for that radionuclide 2,100 are not available for each test separately. More impor- 1949 1950 1952 1953 12 12 13 2 1954 4.2 1956 0.47 1955 1957 1958 20 21 22 44 8.8 0.78 2.1 0.14 0.41 0.09 150 150 1,900 1,900 160 2,100 45 470 160 3.1 13 2.7 0.23 1.4 2.3 13 13 12 9.2 slight overestimates since the derived proportions are relative to only the 63 radionuclides considered. External dose from 7*?**“°Pu, the last radionuclide listed in Table 4 of Simonet al. (2010a), has not been . . tantly, the corresponding external doses would have been cen trivial trivial. As a basis for evaluating the magnitude of the estimated external doses, the annual and total doses reported for adults in Tables 4 to 6 and in Fig. 5 can be compared with the external doses that Marshallese adults typically received from natural background radiation or with typical doses received by Americans wholived near the NTS. The average annual external dose received by Marshallese from natural sources is about 0.24 mGy,