Radionuclide

Effective dose (μSv/y)

Infants

Children

Adults

≤5 y

5 - 10 y

10 - 15 y

≥17 y

²³⁸U

Minimum

0.07

0.30

0.58

1.74

Maximum

0.22

0.92

1.8

5.38

Average

0.13

0.55

1.09

3.25

²²⁶Ra

Minimum

0.47

3.0

11.25

5.25

Maximum

1.56

10.8

40.5

18.90

Average

0.99

6.39

23.97

11.86

²³²Th

Minimum

0.29

1.22

2.1

4.83

Maximum

0.39

3.87

6.68

15.35

Average

0.58

2.41

4.16

9.56

⁴⁰K²²

Minimum

0.29

0.91

1.07

2.17

Maximum

7.40

22.90

26.78

54.61

Average

4.37

13.53

15.82

32.26

Total Average

6.07

22.88

45.03

56.26

^*UNSCEAR 2013

14.9

25.3

37.1

37.1