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Contamination Control Methods - hdbk-1130-98_ch10270
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Radiological Worker Training - index
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Contamination Monitoring Equipment - hdbk-1130-98_ch10272


DOE-HDBK-1130-98
i.
Use standard contamination control procedures as established by the Radiological
Control Organization.
1)
Do not violate contamination area ropes or barricades.
2)
Frisk materials out of contamination areas as directed by site procedures.
3)
Use change areas and step-off pads as directed.
4)
Do not pass items out of contamination areas without following site procedures.
5)
Be alert for potential violations to contamination control procedures.
j.
Ensure ventilation systems are operating as designed (i.e., no unauthorized
modifications).
k.
Radiological workers should always ensure that the proper entry, exit, and equipment
control procedures are used to avoid the spread of contamination. Comply with
procedures!!
2.
Engineering controls
a.
Ventilation
1)
Systems and temporary spot ventilation (e.g., temporary enclosures with HEPA
filters) are designed to maintain airflow from areas of least contamination to areas
of most contamination (e.g., clean to contaminated to highly contaminated areas).
2)
A slight negative pressure is maintained on buildings/rooms/enclosures where
potential contamination exists.
3)
High efficiency particulate air (HEPA) filters are used to remove radioactive
particles from the air.
b.
Containment
Permanent and temporary containments are used for contamination control. Examples
include vessels, pipes, cells, glovebags, gloveboxes, tents, huts, and plastic coverings.
3.
Personal Protective Measures
Sometimes engineering controls cannot eliminate contamination. Personnel protective
measures, such as protective clothing and respiratory equipment, will be used at this point.
a.
Protective clothing
1)
Protective clothing is required for entering areas containing contamination and
airborne radioactivity levels above specified limits to prevent personnel
contamination.
2)
The amount and type of protective clothing required is dependent on work area
radiological conditions and nature of the job.
78


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