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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
X-Ray Device Control Office (or facility-
specific equivalent) personnel develop
recommendations for shielding based on
the following information:
1.
Shielding the primary X-ray beam
and
2.
Shielding the areas not in the line
of the primary beam from leakage
and scattered radiation.
There are independent analyses
for each component to derive an
acceptable shield thickness.
For example, the calculation used
for the primary X-ray beam
depends on:
- Peak voltage.
- The maximum permissible
exposure rate to an individual.
- The workload of the machine
expressed in mA min/wk.
- The use factor: the fraction of
the workload during which the
useful beam is pointed in a
direction under consideration.
- The occupancy factor that takes
into account the fraction of
time that an area outside the
barrier is likely to be occupied
by a given individual.
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