UFC 4-022-01
25 May 2005
Figure 7-3 Example Exclusion Zones for Mobile Inspection Systems
Exclusion
Exclusion
3.0m
4.6m
1.5m
3.0m
Exclusion Zone for MobileSearch
Exclusion Zone for
(Determined by 2 mR/hr threshold)
Mobile VACIS
(Determined by 2 mR/hr threshold)
The Mobile VACIS system is designed to acquire images by either traveling past a
stationary vehicle or in a pass-through mode as a moving vehicle passes through the
scan area. Additionally, the system can conduct operations on either side of the VACIS
vehicle. The vehicle requires a clear height of 20 ft (6.1 m) and a surface grade of less
than 5%. The exclusion zone for each system is illustrated in figure 7-3. Note that this
information was based on available manufacturer literature and it must be verified with
the manufacturer of the specific system anticipated. Also these exclusion zones are
based on the 2mR in any one-hour dose limit. Therefore, the manufacturers should be
contacted for the radiation rate data beyond the exclusion zone to determine the zone
appropriate for a specific application. The 100 mR per year limit may govern the
location of a permanent facility. Since the portable units are entirely self-contained they
require no land based power or other facilities. If an entry control facility or truck
inspection station design is to incorporate a portable vehicle inspection system similar to
those illustrated above, but the system is unspecified the following recommendations
regarding site development should be followed.
Provide a 35 ft (10.7 m) wide x 110 ft (33.5 m) long paved inspection area for
use by the portable equipment. This provides enough width for the inspection
system and the lane of travel for the vehicles to be inspected. The length is
7-6
Previous Page
