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|  DOE-HDBK-1106-97
Lesson Plan
Instructor's Notes
2.
Penetration through walls
Be certain to consider what (or who) is on the other
side of the wall. However, if this can not be
accommodated, shielding should be considered for
the work station on the opposite side of the
workbench where your colleague may be working.
3.
Beta and Gamma Emitters
When shielding for both beta and gamma emitters,
the shielding for the beta emitters should be first.
The beta shield (plastic, wood, foil) should be closer
to the radiation source to minimize the production of
X-rays from the beta emitter interacting with the lead
(gamma) shield.
4.
Considerations
Some considerations for use of shielding were
addressed above. Because issues involving shielding
can be complex, always consult the Radiological
Control Organization before using shielding.
E.
Ventilation Control
1.
Airflow
Airflow should be from the areas of least
contamination to areas of most contamination (e.g.,
clean to contaminated to highly contaminated areas)
such as fume hoods, gloveboxes, etc.
21
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