Molecular Techniques and Methods

Radioactive Waste Control

Copy Right © 2001/ Institute of Molecular Development LLC

Dry Waste


  • Separate Waste by Isotope
  • Obliterate completely the word "radioactive' and all radiation symbols.

  • Package sharps, glass and pipettes in a semirigid tertiary container labeled with its contents. This container is placed in double bags with other dry waste. Double bag waste in clear bags of at least 3 mil thickness*, (18" by 24" size 3 mil bags are available through Lab Safety Supply item 9A-34530 from 1999 catalogue.)

  • Take necessary precautions to prevent external contamination of the outer bag. Twist and tape each bag closed.

  • Fill out the tag completely, include your license number. Express activity in milli or micro curies.

  • Identify any biological materials and contact the radiation safety isotope desk for disposal options.

  • Do not tie bags closed with only tag wires or rubber bands.

  • Do not place biohazardous or other biological material with other dry waste.

  • Do not place lead shielding materials into waste.

  • If you already have a supply of bags of less than 3 mil thickness, they can be used in conjunction with a 3 mil bag (use one of each) until your supply of thin bags is expended.




    Liquid Waste


  • Separate waste by isotope

  • Insure that the lids are tightly closed on all containers during transfer

  • Transfer waste in a secondary container of sufficient volume to contain the waste in the event of a leak.

  • Completely fill out the radiation tag including LA# and all chemical components in percent by volume including water. If hazardous chemicals are present then a hazardous waste tag is also required.

  • Minimize hazardous mixed waste.

  • Inspect containers for holes or cracks before use.

  • Call the isotope desk to schedule the return of waste jugs.




    Liquid Scintillation Fluid


  • Use liquid waste tags for scintillation vials. Double bag vials in their original racks if possible.

  • Insure that the caps are tightly secured on the vials.

  • Write the brand name and/or product name of the cocktail on the tag.

  • Do not fill containers to more then 75% capacity.

  • Do not use containers larger then 10 liters.

  • Do not reuse reagent bottles unless chemical compatibility requires the use of a specific container type.

  • Do not place pipette tips or other solid materials into liquid waste.



    -Preferred Nalgene carboys available from 97-98 catalogue VWR Cat# 16115-125-


  • Please send your comment on this protocol to "editor@MolecularInfo.com".

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