Experts have recommended improving operating and training procedures after inspectors raised concerns about explosives safety at the nation's only nuclear weapons assembly and dismantling plant.
The Amarillo Globe-News reported Thursday that a letter to Pantex from the U.S. Department of Energy cites six incidents since August 2012 that have heightened concerns.
The incidents include improperly packaging explosives in containers not meant for explosives, improper packaging of special nuclear materials and improper shipping of incompatible explosive materials.
Officials with plant operator B&W Pantex told the newspaper they did not want to comment on the letter from the director of enforcement and oversight in the department's Office of Health, Safety and Security.
Pantex, located 17 miles northeast of Amarillo, assembles, dismantles and modifies nuclear weapons from the U.S. atomic arsenal.