DEFROSTING A CONTAMINATED FREEZER
- Check to see if appropriate tritium (3H) waste containers
(liquid and solid) are available for the waste generated from the freezer.
If appropriate waste containers are not available, contact Health Physics
at (303) 492-6523.
- Open the door and follow manufacturer's directions for switching to
- Be sure to place pans and absorbent bench paper around the freezer
to catch any water leakage.
- Prepare the fume hood by placing absorbent paper with a plastic backing
in the bottom of the hood. The fume hood will be used to allow ice to melt
in containers and dry out paper towels.
- When chunks of ice begin to loosen, put on two pairs of disposable
gloves and a lab coat and remove the larger pieces of ice. Change gloves
- Place the ice in large beakers or other containers and let thaw in
an adequately ventilated fume hood.
- Blot up frost melt with disposable paper towels and place the towels
in the hood to dry.
- Place liquid frost melt in a tritium (3H) liquid radioactive
waste container, noting activity on container contents sheet. Place the
dry paper towels and used gloves in a tritium (3H) solid radioactive
waste container, again noting activity on container contents sheet.
- After all the ice and residual liquid is removed, wash down the interior
surfaces with a decontamination solution and disposable paper towels. Rinse
and dry. Dispose of paper towels, rinse, and used gloves as in 5 and 6
- Check area around freezer for contamination
- Wash hands.
F Appendix H