always signify a radiological area. Radiological areas are posted based on the potential for radiation exposure above certain levels, while Radioactive Materials Areas are posted based on the quantity of material. However, in order to maintain control and accountability of radioactive materials, Controlled Areas are always established where radioactive materials are used or stored. Removal of radioactive items from these areas requires RCD approval. Note: Installed beamline components and hardware are not normally tagged as radioactive material. Always get concurrence from the RCD to disassembling/removing such equipment. Typical locations of Radioactive Materials Areas at JLab: Beam Enclosure Areas within the EEL and Test Lab Designated Radioactive Material Storage Areas within the site Controlled Area Summary of Radiation Worker I accessible areas. Location Dose Rate Criteria Posting Controlled < 100 mrem/yr Controlled Area, Training or Area Escort Required for Radiologically > 0.05 mrem/hr Radiologically Controlled Controlled (>100 mrem/yr) Area (or RCA) Dosimetry Area Required for Entry Radiation Area 5 mrem/h - 100 Caution Radiation Area mrem/h High Radiation > 100 mrem/h Caution High Radiation Area, Area RWP Required Hot Spot > 100 mrem/h on Caution Hot Spot contact Radioactive Radioactive Caution Radioactive Materials Area materials above Materials
always signify a radiological area. Radiological areas are posted based on the potential for radiation exposure above certain levels, while Radioactive Materials Areas are posted based on the quantity of material. However, in order to maintain control and accountability of radioactive materials, Controlled Areas are always established where radioactive materials are used or stored. Removal of radioactive items from these areas requires RCD approval. Note: Installed beamline components and hardware are not normally tagged as radioactive material. Always get concurrence from the RCD to disassembling/removing such equipment. Typical locations of Radioactive Materials Areas at JLab: Beam Enclosure Areas within the EEL and Test Lab Designated Radioactive Material Storage Areas within the site Controlled Area Summary of Radiation Worker I accessible areas. Location Dose Rate Criteria Posting Controlled Area < 100 mrem/yr Controlled Area, Training or Escort Required for Radiologically Controlled Area > 0.05 mrem/hr (>100 mrem/yr) Radiologically Controlled Area (or RCA) Dosimetry Required for Entry Radiation Area 5 mrem/h - 100 mrem/h Caution Radiation Area High Radiation Area > 100 mrem/h Caution High Radiation Area, RWP Required Hot Spot > 100 mrem/h on contact Caution Hot Spot Radioactive Materials Area Radioactive materials above Caution Radioactive Materials