“There is…another concern about the NNSA’s plans: The designs of new warheads in which new plutonium pits would be used may depart from designs that have been previously tested. This could result in demands to resume explosive testing, which would undermine the moratorium on nuclear testing that has been observed by all nuclear-weapon states (other than North Korea) since 1998.”
By Curtis T. Asplund, Frank von Hippel, Bulletin of the Atomic Scientists | April 27, 2023 thebulletin.org
For two decades, the Pentagon and Congress have been increasingly concerned that the United States does not have a reliable capability to produce plutonium “pits,” the cores of US thermonuclear warheads. In 2018, the agency responsible for the production and maintenance of US nuclear warheads, the National Nuclear Security Administration (NNSA), responded with a plan to build, on a crash basis, pit production lines in New Mexico and South Carolina at the same time, with a combined production capacity of 80 pits per year.