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  | ![]() DOE-HDBK-1130-98 
Module 9: Radioactive Contamination Control 
Instructor's Notes 
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!! 
EO4 Identify methods used 
2. 
Engineering controls 
to control radioactive 
contamination. 
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. 
HEPA - High Efficiency 
3) 
High efficiency particulate air (HEPA) filters are 
Particulate Air filter. 
used to remove radioactive particles from the air. 
b. 
Containment 
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