Radiation: EC, Gamma

Energy:
Gamma: 0.035 Mev (6.5%)
Ka X-rays: 0.027 Mev (112.5%)
KB X-rays: 0.031 Mev (25.4%)

ALI: 20 uCi

DAC: 1E-8 uCi/mL

• Follow General Precautions for working with radioactive material.
• Use lead foil (~3 mm thick) to shield mCi quantities of I-125.
• Handle multi-mCi quantities with remote handling tools.
• Use double gloves when working with volatile NaI.
• Handle volatile NaI in fume hood.
• A radioiodine fume hood is available through the Radiation Safety Office.
• Film badges are required for work with I-125, except when using the I-125 kits. Ring badges are required for work with quantities greater than 1 mCi.
• Use GM detector or liquid scintillation counter to monitor for I-125.
• Keep containers of NaI closed when not in use to minimize release of volatile material.
• A thyroid scan is required within 24 hours, if possible, but not later than 72 hours after working with the following limits or greater:
  • processes in open room or bench with possible escape of iodine from process vessles: a. 1 mCi, if volatile form and
    b. 10 mCi, if bound to nonvolatile agent
  • processes with possible escape of iodine carried out within a fume hood of adequate design, face velocity, and performance reliability:
    a. 10 mCi, if volatile form and
    b. 100 mCi, if bound to nonvolatile agent
  • processes carried out within gloveboxes, ordinarily closed, but with possible release of iodine form processes and occasional exposure to contaminated box and box leakage:
    a. 100 mCi, if volatile form and
    b. 1,000 mCi, if bound to nonvolatile agent
• Seal all waste containers with NaI to prevent release of volatile material.
• Dispose of radioactive waste in accordance with requirements in Appendix G of the Radiation Safety Manual.