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The National Nuclear Security Administration announced this week that scientists at the Lawrence Livermore and Los Alamos national laboratories have completed two of the largest computer simulations ever attempted and created the first full-system, three-dimensional simulations of a nuclear explosion. 

Both of the simulations, which were achieved on the Advanced Simulation and Computing White supercomputer, were completed at the Lawrence Livermore National Laboratory under the Stockpile Stewardship Program, which is responsible for maintaining the safety, security and reliability of the country's nuclear deterrent. 

The simulation is a milestone of the program, and applauded by Secretary of Energy Spencer Abraham. 

“With this accomplishment the NNSA has advanced the state of the art in computer simulation,” Abraham said.