Lawrence Livermore National Laboratory



The paramount national security mission of Lawrence Livermore is ensuring the safety and reliability of the nation's nuclear weapons stockpile. The Stockpile Stewardship Program, initiated in 1994, was established to keep the U.S. nuclear stockpile safe, secure, and reliable without nuclear testing. Designed to provide an enduring foundation for continued confidence in our nuclear stockpile, it establishes a science-based fundamental understanding of nuclear weapons performance and provides enhanced warhead surveillance tools to detect the onset of problems in the stockpile.

Array of sensors

Rapid Brittle Fracture Simulation

As part of the Stockpile Stewardship Program, LLNL uses supercomputers to generate increasingly realistic simulations ensure the safety and reliability of the nation's weapons stockpile. In this Livermore multimillion-atom simulation crack propagation in rapid brittle fracture was studied on the 12.3-teraops ASC White supercomputer. [More on simulations]

Each year the Stockpile Stewardship Program's most important accomplishment is the ability to assess and certify the safety, security, and reliability of the stockpile without a return to nuclear testing. The multidisciplinary Stockpile Stewardship Program ensures the preservation of the core intellectual and technical competencies of the United States in nuclear weapons without nuclear testing.

With the investments in supercomputers and experimental facilities made over the last decade, the Stockpile Stewardship Program is poised to answer key nuclear weapons physics questions necessary to sustain confidence in warhead certification over the coming decades.