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|  DOE-HDBK-1109-97
Radiological Safety Training for Radiation-Producing (X-Ray) Devices
Instructor=s Guide
MINIMUM SHIELDING TO KEEP THE DOSE RATE BELOW 0.25 MREM/HOUR
ANODE CURRENT
MILLIMETERS OF LEAD
(MA)
50 KVP
70 KVP
100 KVP
20
1.5
5.6
7.7
40
1.6
5.8
7.9
80
1.6
5.9
--
160
1.7
--
--
Lesson Plan
Instructor=s Notes
ii.
Industrial Systems.
Some industrial X-ray systems, such as the
cabinet X-ray systems used for airport
security, are completely enclosed in an
interlocked and shielded cabinet. Larger
systems such as medical X-ray units are
enclosed in a shielded room to which
access is restricted. Shielding for X-ray
rooms is conservatively designed to handle
the expected workload conditions.
Radiological control technicians (RCTs)
periodically verify that the shielding
integrity has not deteriorated.
56
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