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|  Radiological Safety Training for Plutonium Facilities
DOEHDBK11452001
Student's Guide
Fixed air samplers
Facilities are required to sample the air in
areas where an individual is likely to receive
an exposure of 40 or more DAC-hours in a
year. Real-time air monitoring shall be
performed to detect and provide warning of
airborne radioactivity concentrations that
warrant immediate action to terminate
inhalation of airborne radioactive material.
Fixed air samplers are used in these areas
(they may also be in areas with CAMs).
They are sensitive to low levels of airborne
radioactivity (they are capable of
determining a fraction of a DAC), but do not
have alarm capabilities to alert workers to
airborne radioactivity.
Breathing zone
Airborne radioactivity is easily influenced by
air currents, and air samplers (fixed or
CAMs) should be strategically placed to
represent the workers' "breathing zone."
The breathing zone is the air space where
the workers will be breathing the air. If the
air samplers are not located in the breathing
zone, a worker could receive internal
contamination with no indication from the air
monitoring systems.
Lapel air samplers
Lapel air samplers are small battery-
powered devices, attached to workers'
lapels, that draw air through a filter to collect
radioactive particulates for determination of
the air concentration breathed by the
worker.
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