One of the primary missions of NNSA is to maintain and enhance the safety, security and reliability of the U.S. nuclear weapons stockpile. NNSA, through its Office of Defense Programs, ensures that the U.S. nuclear arsenal meets the country’s national security requirements and continues to serve its essential deterrence role.
The Naval Nuclear Propulsion Program provides militarily effective nuclear propulsion plants and ensures their safe, reliable and long-lived operation. This mission requires the combination of fully trained U.S. Navy men and women with ships that excel in endurance, stealth, speed, and independence from supply chains.
NNSA ensures that capabilities are in place to respond to any NNSA and Department of Energy facility emergency. It is also the nation's premier responder to any nuclear or radiological incident within the United States or abroad and provides operational planning and training to counter both domestic and international nuclear terrorism.
The Office of Defense Nuclear Security develops and implements NNSA security programs to protect, control, and account for materials, information, and facilities across the nuclear security enterprise.
The Office of Counterterrorism and Counterproliferation is charged with providing expertise, practical tools, and technically informed policy recommendations required to advance U.S. nuclear counterterrorism and counterproliferation objectives. The office executes a unique program of work focused solely on the these missions, synchronizing their support activities across the NNSA, coordinating DOE/NNSA related policies, and building partnerships with U.S. government agencies and key foreign governments on these issues.