US scientists test strategic nuclear weapons for survivability

US scientists at Lawrence Livermore National Laboratory (LLNL) conducted experiments at the National Ignition Facility (NIF) to test the survivability and performance of nuclear weapons-grade plutonium under conditions simulating enemy missile defense threats. Using the cryogenic-compatible x-ray, neutron, and blast snout (CryoXNBS) diagnostic enclosure, researchers exposed plutonium samples from legacy W87-0 and newly manufactured W87-1 warhead pits to intense 14 MeV neutron radiation. This approach aimed to replicate the extreme heat, shock, and radiation stresses a nuclear warhead might encounter, providing critical data without actual nuclear detonations. The experiment supports the U.S. National Nuclear Security Administration’s efforts to modernize the nuclear stockpile, which currently includes approximately 5,177 warheads, with 3,700 active. By analyzing how plutonium behaves under these simulated conditions, scientists can refine predictive models to ensure the reliability and credibility of the U.S. nuclear deterrent.