Table V
Human radiation exposure
(r/yr)
_
Natural radiation exposure
A.
I.
2.
External Exposure to Whole Body
Cosmic radiation
;
at sea level
at
at
at
at
Exposure from fallout from nuclear detonations
2,000 feet
5,000 feet
10,000 feet
15,000 feet
To gonads and
soft tissue
5
:
Internal Exposure
To bone
0.020
Carbon-14
0.001
Radium
0.002
0.005
0.001,
a
Average
a
0.120
0.023
To gonads and
soft tissue
To bone
(1955)
a
0. 004 ean)
Strontium -90
.
Cesium-137
lodi
0.001
131
oane=
0,126
C.
a
Average
0.001
a
a
G
e
Now
0.164
0.179
0.264
0.282
(young
0.002 (adult)
0. 004 (young)
Total Exposure
.
At 5,000 ft (Denver)
0.003
0.10
B.
Hydrogen-3
0..05
0.12 u°
0.09-0.16
Average
Potassium -40
Salt Lake City
All other U. S. cities
and other countries
0.04
Berkeley hills
Sweden
At sea level
Fallout to earth, 6 Oct. '52 to Sept. '56
0.043
0.056
0.112
0.214
Radiation from the earth
England
Prefallout
l.
0.038
nm
0.165
0, 183
0.269
0.287
i
o
if