A radiography crew had completed activities at a location at the Sun Refinery in Philadelphia
Pennsylvania at approximately 1630 EDT on 5/17/05. The radiography camera used by the crew was an
AEA Model 660B, containing a 32 Curie
Ir-192 source (serial number B3762). The source was safely retracted and locked in its shielded position in the camera. The radiographer believed that the camera was in the possession of the assistant radiographer. The assistant radiographer believed the camera was in the possession of the radiographer. The camera was actually left unattended on a
scaffolding at the Sun Refinery job site. At 2040 EDT on 5/17/05, Sun Refinery personnel discovered the camera while preparing to remove
scaffolding at the job site. The licensee was immediately contacted and recovered the camera. The licensee stated that there is no indication that anyone had disturbed or worked in the vicinity of the camera while it was unattended.