Table 12. The 30-, 50-, and 70-y integral effective dose for Rongelap Island residents fof diet when
imported foodsare unavailable (TUA; i.e., only local foods.)
ne
Integral effective dose , Sv (rem)
30y
Ny
70y
0.0024 (0.24)
0.0033 (0.33)
0.0039 (0.34)
B37Cs
0.0081 (0.81)
0.011 (1.1)
0.013 (1.3)
239+240Py
241Am
5.1 x 10-5 (0.0051)
2.5 x 10-5 (0.0025)
1.3 x 10+ (0.013)
6.0 x 10-5 (0.0060)
23x 104 @.023)
1.0 x 10-4 (§.010)
‘External
Internal
Ingestion
Sr
2.7 x 10+ (0.027)
Inhalation
239+240Py
4.0x 10-4 (0.040)
2.9x 10-5 (0.0029)
241Am
7.0 x 10-5 (0.0070)
1.9 x 10-5 (0.0019)
4.5 x 10-5 (0.0045)
Totala
0.011 (1.1)
0.015 (1.5)
a The total dose may vary in the second decimal place due to rounding.
48x104
(0.048)
1.3 x 10-4 (@.013)
78x 10-5 (§.0078)
0.018 (1.8)
Table 13. Comparison of the doses estimated in 1982 based on the 1978 NMIRSdata, to those in this
report for the case of imported foods available.
Previous Estimates (1998+)
Current estimajes
(1995)
Maximum annual effective dose
0.37 mSv (37 mrem)
0.26 mSv (26 nrem)
30-y integral effective dose
0.0089 Sv (0.89 rem)
0.0059 Sv (0.$9 rem)
50-y integral effective dose
0.012 Sv (1.2 rem)
0.0082 Sv (0.42 rem)
70-y integral effective dose
0.013 Sv (1.3 rem)
0.0097 Sv (0.97 rem)
4
Doses are decay corrected to 1995 for comparison with the current dose estimates.
United States is about 3 mSv y-! (300 mrem y-1);
the breakdown by source is given in Table 14
uncertainty in the current estimatd of 2 mSv y—!
(200 mrem y-1).
background effective dose is 2.4 mSv y-! (240
mrem y-!) with some areas over 10 mSv y—! (1000
mrem y-!) (UNSCEAR, 1972, 1988). Note the
major contribution is from radon; only in the last
few years has the extent and magnitudeof this
in the Marshall Islands
concentration of the parent
cause the
jJadionuclide,
(USAEC,1973), the concentration
radon in the
estimates determined.
1987), and the open, outdoor
l#estyle in the
(NCRP, 1987a)..
The world-wide average
source been addressed and average dose
There is still some
Exposure to radon is essentiallf insignificant
Radium-226 (226Ra), in coral so# is very low
air is very much lower than ovdr continental
land masses, (Larson and Bressan, 1980; Robison,
31