Sealed Source Safety Manual

25 Sealed Source Safety Manual Notify EH&S immediately (24/7) if a nuclear gauge is missing, damaged, or the source cannot be retracted. Nuclear gauge accidents have specific reporting schedules that must be observed. Equipment A calibrated radiation detection meter is required for source verification and exposure measurements. Contact EH&S for the correct type of meter to use with your nuclear gauge. Storage Postings – Once a room is approved for nuclear gauge storage or use, EH&S will post the required signs. No work involving nuclear gauges may be initiated until the following signs have been posted. • “Caution Radioactive Materials” signage – This sign alerts personnel to the presence of sealed sources. • ISU Radiation Safety Posting – This posting includes ISU procedures and contact information. • Iowa Department of Public Health (IDPH) Notice to Employees – This document summarizes the rights and responsibilities of radiation workers and provides IDPH contact information. • IDPH Notice to Workers – This posting includes information on where to find applicable rules for working with radioactive material. Safety • Nuclear gauges should be stored no closer than 15 feet from the nearest work area. • Always keep unauthorized/untrained persons away from the nuclear gauge. • Members of the general public shall not receive an equivalent dose of more than 2 mrem (0.002 rem) in any one hour or 100 mrem (0.1 rem) per year. • After making changes affecting the portable gauge storage area (e.g., changing the location of portable gauges within the storage area, removing shielding, adding portable gauges, changing the occupancy of adjacent areas, moving the storage area to a new location), contact EH&S to reevaluate compliance with public dose limits and ensure proper security of portable gauges. Temporary – If the portable nuclear gauge is used at a remote job site and will not be returned to the permanent storage area at the end of the day, the temporary storage location must follow the