WCI’s computer simulations and code development are conducted on two of the world’s most capable supercomputers, which are operated by LLNL’s Computation Directorate in their Terascale Simulation Facility. Weapon system simulations are done on IBM’s “Purple” machine – capable of 100 trillion floating-point operations per second (i.e., 100 teraFLOPS) peak speed. This is a shared facility used by scientists from both Livermore and Los Alamos to support NNSA’s Stockpile Stewardship Program. Weapon science calculations are done on the world’s fastest supercomputer, IBM’s “BlueGene/L, which is #1 on the TOP 500 list of worldwide supercomputers with a sustained speed of 280.6 teraFLOPS (367 teraFLOPS peak speed). The combination of these two machines provides the high-performance computing capability required for the largest, most complex weapon simulations on the Purple machine as well as the capacity to conduct the high volume of smaller calculations needed to advance our knowledge of weapon science on BlueGene/L. B Division maintains an extensive code-development effort to enable application of our world-class computing platforms to problems relevant to our mission.
LLNL’s supercomputers, including “Purple” and “BlueGene/L,” are housed in our Terascale Simulation Facility operated on our main site by LLNL’s Computation Directorate.
"Public-viewable" Codes developed within B Division
Codes no longer supported, but left here for your convenience