Tangle Lo
Dose Rates Due to External and .nternal Irradiation from
Natural Sources in "Nurmal" Areas
(from the 1966 UNSCEAR Report)
Dose Rates (mrad/v)
Source of [Irradiation
Gonads
YNaversian
Canal
Bone
Marrow
External irradiation
Cosmic rays
Ionizing component
28
Neutrons
0.7
Terrestrial radiation
(including air)
28
0.7
28
0.7
50
50
50
20
15
15
< 0.3
<0.3
Internal irradiation
KAO
Rb?!
0.3
226
Ra e
-
0.6
0.03
Rare’
-
0.7
0.03
Poet
0.3
2.1
0.3
0,3
0.3
0.3
cl4
Rn
222
0.7
fas
.
.
(dissolved in tissues)
Rounded Total
100
1.6
99
1.6
96