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Y-12 National Security Complex


The Y-12 National Security Complex plays an important role in U.S. national security and is a one-of-a-kind facility in the National Nuclear Security Administration’s nuclear Weapons Complex. 

Y-12 was originally responsible for separating uranium-235 from natural uranium by the electromagnetic process.  Today, the site maintains a uranium and lithium technology base for the U.S. and focuses on defense-related R&D and nuclear nonproliferation.

 Y-12 has developed state-of-the-art capabilities in manufacturing technologies, protoyping, technical computing, nuclear nonproliferation and safeguards and security.

The Y-12 National Security Complex:

  • Provides critical elements of NNSA’s missions that ensure the safety, reliability and performance of the U.S. nuclear weapons deterrent
  • Supplies special nuclear material for use in naval reactors
  • Promotes international nuclear safety and nonproliferation
  • Reduces global dangers from weapons of mass destruction
  • Supports U.S. leadership in science and technology
  • Applies its expertise to solving a wide range of problems for U.S. industry through partnering and technology transfer