 It is home to the Spallation Neutron Source, a 1.4 billion dollar project completed in 2006, and "Titan", one of the world's most powerful scientific supercomputers, which has peak performance of more than one quadrillion operations per second.The Y-12 National Security Complex is a component of the U.S. nuclear weapons complex.The Department of Energy's Environmental Management office is conducting an extensive program of decontamination and decommissioning, environmental cleanup, and waste management to remove or stabilize the hazardous residues remaining from decades of government production and research activities.