5.3 Radiation Warning Signs and Labels

Caution – Radioactive Materials.  This warning sign is used to indicate that radioactive materials may be used or stored in this lab or area. 

Caution – Radiation Area.  This warning sign is used to indicate areas where radiation levels may exist that are in excess of 5 mrem per hour at a distance of 30 cm from the source of radiation or from any surface that the radiation penetrates.

Caution – High Radiation Area.  This warning sign is used to indicate areas where radiation levels may exist that are in excess of 100 mrem per hour at a distance of 30 cm from the source of radiation or from any surface that the radiation penetrates.

Radiation Warning Labels.  Use radiation warning labels to mark containers and equipment used to manipulate or store radioactive materials, contaminated items, or other sources of ionizing radiation.

Remove all radiation warning labels on items that no longer contain radioactive material, are no longer contaminated as determined by the appropriate survey or can no longer produce ionizing radiation.