Missions
The U.S. Nuclear Weapons Stockpile
One of NNSA’s core missions is to ensure the United States maintains a safe, secure, and reliable nuclear stockpile through the application of unparalleled science, technology, engineering, and manufacturing. The Office of Defense Programs carries out NNSA’s mission to maintain and modernize the nuclear stockpile through the Stockpile Stewardship and Management Program.
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NNSA works to secure or dispose of dangerous nuclear material, and detect and control the proliferation of related WMD technology and expertise.January 7, 2025 -
The Naval Nuclear Propulsion Program provides militarily effective nuclear propulsion plants and ensures their safe, reliable and long-lived operationJanuary 15, 2025 -
NNSA has a key role in U.S. efforts to prepare for, prevent, and respond to a terrorist or other non-state actor with a nuclear or radiological deviceJanuary 3, 2025
Established by Congress in 2000, NNSA is a semi-autonomous agency within the U.S. Department of Energy that protects our nation by designing and delivering a safe, secure, reliable, and effective U.S. nuclear stockpile; forging solutions that enable global security and stability through nonproliferation, counterproliferation, and emergency response; providing nuclear propulsion to power a global U.S. Navy; and leveraging transformative technologies to address emerging challenges.
NNSA and our partners across laboratories, plants, and sites — collectively the Nuclear Security Enterprise — provide comprehensive nuclear security solutions that protect the American people, our allies, and our partners in a dynamic world.
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January 16, 2025
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January 13, 2025