Office of Research

XIII. Labeling and Posting Requirements

A.        All areas, items, or containers within Restricted Areas will be posted with appropriate warning signs or labels as defined by S.C. DHEC Title-A Radioactive Materials Regulation 61-63.

1. Restricted Area

Any area to which access is controlled by the licensee for purposes of protection of individuals from exposure to radiation and rad materials.

2. Radioactive Materials Area

At a minimum, the entrance doors to rooms and laboratories in which radioactive materials are stored or used will be posted with a yellow and magenta sign bearing the radiation trifoil and the words "CAUTION-RADIOACTIVE MATERIALS". 

3. Radiation Area

A radiation area is any area where there exist dose rates such that a major portion of the body could receive a dose of 2 millirem in any one hour.  Dose rates of > 2 mR/hr but <100 mR/hr require posting as a RADIATION AREA.  The dose rate at the boundary of a radiation area may not exceed 2 mR/hr.  The posting of equipment as a radiation area will be based on a dose rate of 2 mR/hr measured at a distance of 12" from the source.

4. High Radiation Area

Any area where there exist dose rates such that a major portion of the body could receive a dose of 100 millirem in any one hour will constitute a HIGH RADIATION AREA.  Dose rates of >100 mR/hr, but <1000 mR/hr require posting as a HIGH RADIATION AREA.  The dose rate at the boundary of a high radiation area shall not exceed 100 mR/hr.  The posting of equipment as a high radiation area may be based on a reading of 100 mR/hr when measured at a distance of no more than 12". 

5. Airborne Radioactivity Area

Any room, enclosure or operating area where airborne radioactivity is in excess of 20% of the amounts specified in S.C. DHEC Title A RHA 3.53 Appendix B, Table I Column 

6. Contaminated Area

Any area with removable surface contamination ³200 dpm/100 cm2 beta / gamma or 20 dpm / 100 cm2 alpha

7. Additional Postings

DHEC Form RHA-20, Notice to Employees and the DHEC "Emergency Radiological Assistance" Form will be posted in a highly visible location within the lab or use area.