Table 5.
Estimated total 137Cs deposition (Bq m−2), external dose (mGy), and internal dose (mGy, sum of acute + chronic) to red bone marrow (RBM), thyroid, stomach, and colon of representative adults of all population groups. Values in table are best estimates and 90% uncertainty range (5%–95%) as discussed in text. All entries are rounded to two significant digits.
| Community/Atoll by geographic grouping | Total 137Cs, kBq m−2 (5%–95%) | External dose, mGy (5%–95%) | Internal dose to RBM, mGy (5%–95%) | Internal dose to thyroid, mGy (5%–95%) | Internal dose to stomach wall, mGy (5 %–95%) | Internal dose to colon, mGy (5%–95%) |
|---|---|---|---|---|---|---|
| Southern latitude group | ||||||
| Ailinglaplap | 1.5 (0.73–2.8) | 6.9 (1.8–18) | 0.80 (0.051–3.8) | 20 (1.3–93) | 0.84 (0.054–4.0) | 4.3 (0.27–20) |
| Arno | 2.2 (1.1–3.8) | 10 (2.7–28) | 1.2 (0.07–5.2) | 25 (1.6–120) | 1.1 (0.07–5.2) | 5.6 (0.36–26) |
| Aur | 2.0 (1.2–3.1) | 9.9 (2.6–26) | 1.1 (0.068–5.1) | 25 (1.6–120) | 1.1 (0.070–5.2) | 5.7 (0.36–27) |
| Ebon | 1.4 (0.95–2.0) | 5.3 (1.4–14) | 0.74 (0.047–3.5) | 12 (0.76–56) | 0.67 (0.042–3.2) | 2.7 (0.17–13) |
| Erikuba | 2.4 (1.7–3.4) | — | — | — | — | — |
| Jabala | 1.7 (0.81–3.0) | — | — | — | — | — |
| Jaluit | 1.5 (0.80–2.5) | 6.6 (1.8–18) | 0.78 (0.050–3.7) | 14 (0.91–68) | 0.74 (0.047–3.5) | 3.3 (0.21–15) |
| Kili Islandb | 1.5 (0.89–2.3) | 11 (2.8–28) | 1.1 (0.071–5.3) | 27 (1.7–130) | 1.2 (0.074–5.5) | 6.1 (0.39–29) |
| Knox | 1.6 (0.95–2.5) | — | — | — | — | — |
| Lae | 2.0 (0.76–4.5) | 10 (2.7–27) | 1.1 (0.070–5.2) | 28 (1.8–130) | 1.2 (0.074–5.5) | 6.2 (0.39–29) |
| Lib Island | 2.4 (0.97–4.9) | 12 (3.2–33) | 1.3 (0.081–6.0) | 34 (2.2–160) | 1.4 (0.088–6.6) | 7.3 (0.45–34) |
| Majuro | 2.0 (1.4–2.9) | 9.8 (2.6–26) | 1.1 (0.069–5.1) | 23 (1.5–110) | 1.1 (0.068–5.1) | 5.4 (0.34–25) |
| Maloelap | 2.4 (1.4–3.8) | 12 (3.3–33) | 1.3 (0.083–6.1) | 32 (2.0–150) | 1.4 (0.086–6.4) | 7.1 (0.45–33) |
| Mili | 1.6 (0.95–2.5) | 7 (1.9–19) | 0.84 (0.054–4.0) | 17 (1.1–80) | 0.82 (0.052–3.9) | 3.9 (0.25–18) |
| Namorik | 1.3 (0.75–2.1) | 5.5 (1.5–15) | 0.68 (0.043–3.2) | 12 (0.76–56) | 0.63 (0.040–3.0) | 2.7 (0.17–13) |
| Namu | 2.0 (0.82–4.1) | 11 (2.8–28) | 1.1 (0.068–5.1) | 29 (1.8–140) | 1.2 (0.074–5.5) | 6.1 (0.39–29) |
| Ujae | 1.6 (0.53–3.7) | 8.6 (2.3–23) | 0.87 (0.055–4.1) | 22 (1.4–100) | 0.92 (0.058–4.3) | 4.9 (0.31–23) |
| Rongelap control groupc | 2.8 (1.7–4.5) | 22 (15–31) | 21 (1.3–97) | 53 (3.4–250) | 17 (1.1–82) | 27 (1.7–129) |
| Mid-latitude group | ||||||
| Ailuk | 7.5 (3.8–14) | 59 (16–160) | 5.8 (0.37–27) | 160 (10–760) | 7.1 (0.45–33) | 44 (2.8–210) |
| Jemo Islanda | 5.2 (2.5–9.5) | — | — | — | — | — |
| Kwajalein south | 3.6 (2.2–5.5) | 22 (5.8–58) | 1.9 (0.12–9.2) | 67 (4.3–320) | 2.4 (0.15–11) | 14 (0.88–65) |
| Kwajalein northa | 4.3 (1.9–8.1) | — | — | — | — | — |
| Likiep | 5.5 (2.5–11) | 39 (10–100) | 3.5 (0.22–16) | 110 (7.0–520) | 4.3 (0.27–20) | 25 (1.6–120) |
| Mejit Island | 6.6 (3.3–12) | 49 (13–130) | 4.5 (0.29–21) | 120 (7.7–580) | 5.3 (0.34–25) | 31 (2.0–150) |
| Ujelangd | 4.0 (1.8–7.8) | 25 (6.6–66) | 2.2 (0.14–10) | 86 (5.4–400) | 3.0 (0.19–14) | 18 (1.1–84) |
| Wotho | 4.0 (2.4–6.4) | 23 (6.2–62) | 2.2 (0.14–10) | 77 (4.9–360) | 2.8 (0.18–13) | 15 (0.96–71) |
| Wotje | 5.2 (2.6–9.4) | 31 (8.2–82) | 2.8 (0.18–13) | 80 (5.1–380) | 3.1 (0.20–15) | 17 (1.1–82) |
| Utrik group | ||||||
| Utrike | 29 (15–50) | 130 (53–260) | 35 (3.8–138) | 760 (83–3,000) | 41 (4.4–160) | 210 (23–830) |
| Takaa | 20 (11–33) | — | — | — | — | — |
| Northern latitude group | ||||||
| Ailinginaef | 54 (24–110) | 470 (125–1,300) | 25 (1.6–120) | 2,600 (160–1,200) | 232 (15–1,100) | 940 (60–4,500) |
| Bikara | 68 (26–150) | — | — | — | — | — |
| Rongelap northa | 560 (180–1,300) | — | — | — | — | — |
| Rongelap Island communityg | 180 (100–280) | 1,600 (1,100–2,200) | 42 (8.4–130) | 7,600 (1,500–23,000) | 550 (110–1,700) | 2,800 (560–8,500) |
| Rongerikh | 120 (45–250) | 940 (390–1,900) | 11 (0.71–52) | 3,900 (250–19,000) | 200 (13–940) | 1,200 (77–5,700) |
| Taongia | 1.2 (4.0–2.8) | — | — | — | — | — |
No dose entry indicates an atoll or island that was not traditionally inhabited.
Deposition pertains to the total 137Cs deposited on Kili Island from all tests. Doses pertain to Bikini community.
Rongelap control group refers to 117 Rongelap community members who were not on Rongelap Island at the time of the Bravo test and were assumed in this work to have been on Majuro at that time. Deposition pertains to the sum of the 137Cs deposited on Majuro in 1954 and 1956, and on Rongelap Island for the other years. Doses account for the entire residence history of this group (see Table 3).
Deposition pertains to the total 137Cs deposited on Ujelang Atoll from all tests. Doses pertain to Enewetak community.
Deposition pertains to the total 137Cs deposited on Utrik Atoll from all tests. Doses pertain to Utrik community.
Deposition pertains to the total 137Cs deposited on Sifo Island, Ailinginae Atoll. Doses, however, pertain solely to 18 members of Rongelap community exposed to Bravo fallout on Sifo Island, but exposed to fallout from all other tests at the same locations as the Rongelap Island community (see Table 3 for relocation history).
Deposition pertains to the total 137Cs deposited on Rongelap Island from all tests. Doses, however, account for evacuations and relocations of the community (see Table 3 for relocation history).
Deposition pertains to the total 137Cs deposited on Rongerik Atoll. Doses pertain only to the acute exposure from Bravo fallout received by U.S. military weather observers.