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Radiation Safety

Exposure Records

All personnel expected to receive one-tenth of their maximum permissible exposure are required to wear a personal monitor (film badge). Badges are exchanged every two months, and reports of doses recorded on the badges are reported by our dosimetry service.

We are required by law to keep the dosimetry reports in perpetuity in our department. A copy of each report is sent to each department in which radioactive material users work. Additionally, a report of dose received is sent to each rad worker annually, and a rad worker may request a record of his/her dose received at any time.


All users of radioactive material are required to attend a two and one-half hour training session prior to beginning work with radioactive materials. These sessions are offered at least three times during the year; Responsible Investigators will be informed of the specific dates, times, and locations about two weeks prior to each session, and sign-up is required. All rad workers are also required to attend a one-hour review session annually. Again, RI's are notified of dates, times, and locations about two weeks prior. No sign-up is required for the reviews.

Online Training

Online Quiz

Additionally, classes are offered on an as-needed basis for Laser Safety, X-ray Machine Safety, and other issues relating to both ionizing and non-ionizing radiation.

Waste Disposal

Radioactive waste pick-ups are normally scheduled twice a month on Tuesday afternoons. Whether it is the first and third Tuesday, or the second and fourth, will depend upon the building in which the lab is located. Special waste pick-ups will be done only in extremely rare circumstances. For any rad waste to be picked-up, it must be properly bagged or contained, and the necessary forms must be completed.

Radioactive waste must be separated into one of nine different categories:

  • Dry-solid, long half-life (89 days or greater).
  • Dry-solid, short half-life (less than 89 days).
  • Liquid, aqueous (any half-life).
  • Liquid, organic (H-3 and C-14 only).
  • Liquid, organic (all other isotopes).
  • Scintillation vials (H-3 and C-14 only).
  • Scintillation vials (all other isotopes).
  • Animal carcasses (H-3 and C-14).
  • Animal carcasses (all other isotopes).

Radiation Producing Machines

In accordance with the 410 IAC 5, the Indiana Rule for Radiation Control, we maintain an inventory of all machines on campus that produce ionizing radiation. Periodic surveys are conducted, and records of those surveys are kept in our department.

Risk Management and Safety must be notified any time a radiation producing machine is purchased or otherwise put into use on campus, so that the necessary application process for registration with the State of Indiana can be completed.


An inventory of all Class 3B and Class 4 lasers is maintained by Risk Management and Safety. Periodic safety surveys are conducted, and training is provided on an as-needed basis.

Our department should be notified anytime a new Class 3B or Class 4 laser is put in to use on the campus. Additionally, we must be notified when new personnel plan to begin work with one of these laser classifications so that the appropriate training can be provided.

UV Light

Information regarding the possible biological effects of ultraviolet light, as well as incidents involving ultraviolet light at other facilities is available at RM&S.


Several campus buildings, as well as some off-campus property, have been tested for radon gas concentration. No levels above the EPA Action Level were reported. Results are available in the RM&S office. Although no radon gas testing is currently being conducted, information regarding testing methods is available through RM&S.