Table 4.
Cumulative (1979) dose equivalent summary (rem) for adults (class-
ified as persons >16 years of age upon return to Utirik in June
1954 or to Rongelap in June 1957 and having a mean body mass >60
kg).
Nuclide
Utirik
Rongelap
Utirik
Total-body
90sy
5Fe
137¢,
605
6°20
Total internal
Net external*
Total
0.0118
0.0329
1.13
0.507
12.5
14.2
3.19
17.4
Rongelap
Thyroid
0.0267
0.000749
0.0230
1.71
0.00169
0.0594
1.55
0.0143
0.0757
0.0415
2.35
0.359
11.1
1.85
2.02
0.0101
0.0672
13.1
3.19
3.87
2.47
2.02
16.3
Red marrow
4.49
Testes-ovaries
90s,
55Fe
0.0537
0.0603
0.123
0.0422
0.000749-0.000749
0.0583-0.0620
60c,
0.629
0.0177
0.442-1.78
1376,
657n
Total internal
Net external*
Total
1.70
17.2
19.6
3.19
22.8
2.57
0.103
2.86
2.02
4.88
1.54-1.74
137¢.
6065
657n
Total internal
Net external*
Total
0.225
0.0666
0.591
4.66
15.0
20.5
3.19
23.7
0.567
0.0465
0.895
0.132
0.0910
1.73
2.02
3.75
2.33-2.63
0.0125-0.0520
11.3-16.3
0.0685-0.0988
13.3-19.9
2.49-2.82
3.19
2.02
16.5-23.1
Lower large intestine wall
90s >
3 5fe
0.00169-0.0016
0.0736-0.0433
4.51-4.84
Liver
0.000671
0.115
1.81
0.792
16.5
19.2
3.19
22.4
0.00152
0.0804
2.74
0.0223
0.136
2.98
2.02
5.00
*A value of 0.73 rads in tissue of interest per roentgen measured in air at
one meter above the surface was used to convert exposure in air to dose
equivalent. The source was assumed to be exponential distribution of 137¢5
activity with depth in soil, typical of aged fallout (B.G. Bennett, Health
Physics 19:757-67, 1970). Because of the multidirectional nature of the
source, variation of dose with depth of organ is minimal.
External doses
are adjusted for lifestyle variations (e.g., standing, sitting, fishing,
etc.).
- 116 -