Labconco Protector 4882200 User Manual page 38

Chapter 5: Using Your Protector Radioisotope Fume Hood
34
Final Purging
• Upon completion of work, the hood should be
allowed to operate for two to three minutes
undisturbed, to purge airborne contaminants
from the work area before shutting down
blower.
Unloading Materials and Equipment
• Objects in contact with contaminated material
should be surface decontaminated before
removal from the hood.
• All open trays or containers should be covered
before being removed from the hood.
Final Decontamination
• Water washdown or flooding the surfaces with
water is standard practice and results in about
50% reduction of contamination on the 304
stainless steel liner material due to
radiochemicals.
• A secondary means of surface decontamination
involves the use of organic solvents that can
result in up to 75% reduction of contamination
due to radiochemicals.
• Even though 304 stainless steel seams are
smooth to the touch, there are microscopic voids
within the surface in which radioactive particles
can lodge and are not easily removed except by
abrasion decontamination. Abrasion
decontamination consists of sanding and/or
scouring operations to dislodge radioactive
particles from the stainless steel hood liner.
Shutdown
• Only turn off the fluorescent light and hood
blower if final decontamination is complete, and
then close the sash.
Your Next Step
After you understand how to operate and work in the
fume hood, you are ready to proceed to Chapter 6:
Maintaining Your Protector Radioisotope Fume Hood.
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