High Quality Content by WIKIPEDIA articles! The Pantex plant is America`s only nuclear weapons assembly and disassembly facility and is charged with maintaining the safety, security and reliability of the nation’s nuclear weapons stockpile. The facility is located on a 16,000 acre (65 km2) site 17 miles (27 km) northeast of Amarillo, in Carson County, Texas in the Panhandle of Texas. The plant is managed and operated for the United States Department of Energy by BWXT Pantex and Sandia National Laboratories. BWXT Pantex is a limited liability enterprise of Babcock Wilcox Technical Services Group, Honeywell and Bechtel.