Radiological Safety Traning for Uranium Facilities
Module 104 - Internal Dose Control
· long-term, low-volume air samples that provide an average of the airborne
concentration over a given time;
· short-duration, high-volume air samples taken in the breathing zone of a
worker during work activities likely to generate airborne contamination;
· low-volume (about 2 liters per minute) breathing zone samples from personal
air monitors; and [Note: A liter is approximately the same volume as a quart.
Use the concept of a 2-liter soda bottle to discribe the quantity.]
· continuous air monitors that track airborne contamination levels over time and
can be set to alarm if a specified level is reached.
It is important that air samples represent the actual airborne contamination levels
breathed by the worker so that accurate intakes may be estimated. Air
monitoring is also used to detect loss of containment. It is important to ensure
sample volumes and methods allow detection of airborne contamination levels
below the level of concern.
Minimization of Contamination Areas
Loose contamination on work surfaces can result in contamination of shoes,
clothing, and skin and thereby result in the potential for tracking of
contamination into uncontrolled areas.
This potent ial can be red uced by:
· minimizing the size and number of contamination areas,
· using disposable work surfaces (such as covering a benchtop with plastic)
when performing work that is likely to generate contamination, and
· promptly decontaminating work surfaces (good housekeeping).