X-Ray Device Control Office - hdbk110997

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:

Shielding the primary X-ray beam

and

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.