Quantcast Figure 7.9 VACIS II - Gamma Ray Imaging System Exclusion Zones

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SOURCE: .75 Ci Co-60
.12 mR/hr
250'
22.5
20
.18 mR/hr
200'
5
.28 mR/hr
150'
.52 mR/hr
100'
1.29 mR/hr
50'
33'
30'
2.16 mR/hr
EXCLUSION ZONE UNDER
4.33 mR/hr
10'
U.S. REGULATIONS
0'
DETECTOR TRACK
Figure 7.9 VACIS II - Gamma Ray
Imaging System Exclusion Zones
SOURCE TRACK
100'
5'
Cobalt Source with and without
NOTE: THE EXCLUSION ZONE PERIMETER SHOWN IS BASED
Shielding Wall
ON THE U.S. STANDARD OF A 2 mR/hr LIMIT.
(Courtesy of Science Applications
International Corporation, Inc.)
SOURCE: 0.75 Ci Co-60
22.5
20
5.0
0.07 mR/hr
40'
0.09 mR/hr
30'
0.13 mR/hr
20'
0.17 mR/hr
10'
CONCRETE WALL
12" THICK x 8' HIGH
0'
EXCLUSION ZONE UNDER
10'
DETECTOR TRACK
U.S. REGULATIONS
SOURCE TRACK
5'
100'
NOTE: Value at wall rear is 0.255 mR/hr.
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