Press Release NNSA Announces Completion of first B83 Dismantlement at Y-12 Jan 20, 2011 Program required development of new equipment and training program WASHINGTON, D.C. – The National Nuclear Security Administration (NNSA) today announced that its Y-12 National Security Complex has completed the dismantlement of the first secondary from a retired B83, one of the biggest weapon systems ever built. The B83 was introduced into the U.S. nuclear stockpile in 1983. While the B83 remains in service, some of its components have been replaced and some retired B83s have been removed from the stockpile. “Dismantlement of the first B83 secondary...