Location(RBM)

Activity Concentration (Bq/kg)

Bi-212

Pb-212

Bi-214

Pb-214

Ra-226

Ac-228

NBRB

5.73

9.84

6.57

5.55

18.30

11.22

NGRB

7.05

15.82

3.87

3.44

8.46

5.12

WMRB

0.17

5.44

5.28

2.60

8.86

5.12

Mean

Standard Deviation

4.32

±2.98

10.37

±4.25

5.24

±1.10

3.86

±1.24

11.87

±4.55

6.52

±2.94

Maximum

7.05

15.82

6.57

5.55

18.30

11.22

Minimum

0.17

5.44

3.87

2.60

8.46

3.21