Industrial Systems - DOE-HDBK-1109-97

DOE-HDBK-1109-97

Radiological Safety Training for Radiation-Producing (X-Ray) Devices

Student's Guide

is met if the shielding is at least equal to the thickness of lead specified in the following

table for the maximum rated anode current and potential.

MINIMUM SHIELDING TO KEEP THE DOSE RATE BELOW 0.25 MREM/HOUR

ANODE CURRENT

MILLIMETERS OF LEAD

(MA)

50 KVP

70 KVP

100 KVP

1.5

5.6

7.7

1.6

5.8

7.9

1.6

5.9

160

1.7

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.

X-Ray Device Control Office (or facility-specific equivalent) personnel develop

recommendations for shielding based on the following information:

Shielding the primary X-ray beam and

Shielding the areas not in the line of the primary beam from leakage and scattered