Whole-body dose equivalent rate, mrem/y
60
—o—
50
—k—-
4yold
40
(b)
50-
Newborn
4-month old
—o—
1.5-y old
—i—
12-y old
——
10
Years after Ingestion
12-y old
——
—O——*—
0
1.5-y old
60
—e—
40+
4-month old
g-month old
—A—
20
Newborn
—__o—
—_o-—
60
Whole-body dose equivalent rate, mrem/y
—i—
(a)
20
9-month old
4-y old
18yold
30
Figure 3. The annual dose equivalent from ingestion of 157Cs_ beginning at different ages; (a) shows
lifetime dose equivalent rates and (b) shows an expanded view of (a) for the first 30 y of exposure.