At the end of a busy shift the hot lab holds two multi-dose vials of different nuclides, several drawn patient doses, and the sealed flood source used for daily camera checks. The department requires shielding, separation of unsealed material from sealed sources, and restricted overnight access. Which storage arrangement for the radiopharmaceuticals and sealed source meets all three requirements?

The arrangement with each container in its own labeled shielded holder, the sealed and unsealed groups stored apart, and the storage locked meets all three requirements. Individual shielding limits radiation exposure, separation prevents inappropriate contact or contamination concerns, and locked storage restricts overnight access. Keeping vials and the flood source in shielded holders while leaving drawn patient doses in a labeled refrigerator tray does not meet the shielding requirement for those doses. A refrigerator may be suitable for some products, but it does not substitute for radiation shielding. Placing the sealed and unsealed groups in separate bins within one locked cabinet compartment provides shielding and a lock, but fails the required separation between the groups. Locking the storage while keeping the key in a shared night-staff key cabinet provides shielding and separation, but the key remains available beyond a specifically restricted group, so the lock alone does not ensure restricted access. Exam caveat: shielding, physical separation, and access control are distinct requirements; satisfying one does not imply the others. Practical check: verify the facility’s storage procedure, including container shielding, designated locations for sealed and unsealed sources, and who can retrieve the key overnight.