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DOE-HDBK-1109-97
Radiological Safety Training for Radiation-Producing (X-Ray) Devices
Instructor's Guide
Lesson Plan
Instructor's Notes
4.
The examination of large or bulky
samples.
The following safety features are essential
in an open-beam X-ray system:
1.
Each port of the X-ray tube
housing must have a beam shutter.
2.
All shutters must have a
conspicuous SHUTTER OPEN
indicator of fail-safe design.
3.
Shutters at unused ports should be
mechanically or electrically
secured to prevent casual opening.
4.
Special rules apply when the
accessory setup is subject to
change as is the case with powder
diffraction cameras. In these cases,
the beam shutter must be
interlocked so the port will be
open only when the accessory is in
place.
5.
Exposure rates adjacent to the
system must not exceed
2.5 mrem/hour at 5 cm from the
surface of the housing.
6.
A guard or interlock must prevent
entry of any part of the body into
the primary beam.
69


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