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Evaluation of Work Activities - doe-hdbk-1113-98_reaffirm_2005_040142
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Radiological Safety Trainign for Uranium Facilities
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Minimization of Contamination Areas - doe-hdbk-1113-98_reaffirm_2005_040144


DOE-HDBK-1113-98
Radiological Safety Training for Uranium Facilities
Module 104 Internal Dose Control
c.
Control and Monitoring of Airborne Contamination
Uranium contamination is relatively dense (heavy) so it is not easily
stirred up into the air and quickly settles out when disturbed. Therefore, it
is unlikely that significant airborne contamination will result from normal
activities (such as walking) in areas contaminated with uranium. It is
possible for airborne contamination to result from activity that vigorously
disturbs the surface, such as sweeping, grinding, welding, and direct, high-
volume air flow. Failure to control airborne contamination could result in
inhalation of the contamination and spread of contamination to other
areas.
Control of airborne contamination should include:
an evaluation of activities that are likely to cause contamination to
become airborne,
engineered controls such as installed or portable ventilation with High
Efficiency Particulate Air filtration systems (HEPA systems) to
remove contamination from the air at a point as close to the source as
possible,
physical barriers (e.g., pipes, gloveboxes, etc) and pressure differential
zones,
use of alternate work activities or equipment that is less likely to
generate airborne contamination,
air sampling to track airborne contamination levels, and
using respiratory protection to minimize internal dose of the worker.
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