July 30, 1999
Issued to Lockheed Martin Energy Systems, Inc. related to Radioactive Material Uptakes at the Y-12 National Security Complex
This letter refers to the Department of Energy's (DOE) evaluation of the facts and circumstances concerning the unexpected uptakes of a radioactive material, [ ], by employees at the Y-12 Plant subsequent to the June 8, 1998, restart of [ ] operations [ ]. These uptakes occurred at Y-12 Buildings 9212 and 9215 and involved 55 workers over a period of approximately five months. Radiation doses received by these workers ranged from 115 to 1124 millirem committed effective dose equivalent. During April 6-7, 1999, DOE conducted an investigation of these uptakes to determine what, if any, noncompliances with nuclear safety regulations may have occurred. A copy of the investigation summary report is enclosed.