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.