Penetration through walls

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.