The licensee called to report that a Filtec FT-50 fill level
gauge, serial number, 112082, containing 100 millicuries of
Am-241 in sealed source, serial number 4473, could not be located during inventory. The unit was removed from a manufacturing line in June, 1995 and stored in a building along with other idle equipment. During a recent project to clean this building and dispose of old equipment, the licensee was unable to locate this unit. An extensive search was conducted throughout the facility and the
gauge could not be located. Personnel who may have had knowledge of the unit were interviewed. The last documented time that the
gauge was seen in storage was in January 1998. The licensee believes that the unit was discarded with other idle equipment. The manufacturer's records indicate the source was not returned to them. Inspectors [Tennessee Division of Radiological Health] are enroute to the facility to investigate.