Sample

No.

Radiation hazards

Radium equivalent

Ra_eq (Bq/Kg)

Absorbed dose

D (nGy/h)

Annual effective dose

D_eff (mSv/y)

External index (H_ex)

Internal index (H_in)

SS1

Region 1

Al Wajh

167.43

49.45

44.45

0.31

0.46

SS2

Al Ula

14.03

3.54

1.32

0.02

0.03

SS3

Al Ula

422.73

102.10

41.68

0.63

0.74

SS4

Al Ula

18.06

4.55

1.76

0.03

0.03

SS5

Al Ula

38.15

12.19

6.56

0.08

0.13

SS6

Al Ula

127.60

39.39

18.56

0.24

0.36

SS7

Al Ula

6.29

1.52

0.62

0.01

0.01

Average

121.13

27.22

11.75

0.07

0.10

SS8

Region 2

N. Al Ula

9605.84

2993.47

1596.02

18.65

30.00

SS9

6429.92

1680.42

747.86

10.34

13.67

SS10

2880.90

848.27

406.10

5.17

7.73

SS11

7346.45

1885.34

821.83

11.58

14.91

SS12

Az Zabirah- Wasia

2214.70

569.59

310.84

3.52

5.97

SS13

5792.80

1961.90

867.72

12.10

15.77

SS14

5516.20

1761.49

807.54

10.86

14.84

SS15

6188.40

2134.00

979.17

13.19

17.92

SS16

6461.10

2191.35

1039.36

13.56

19.17

Average

5775.19

1787.78

846.58

11.57

15.64

UNSCEAR, 2000

370

65

1

≤1

≤1