View source for Y-12 National Security Complex

{{Organization
|OrganizationName=Y-12 National Security Complex
|OrganizationType=Government Corporations (Sub-organization)
|Mission=Y-12 supports the U.S. nuclear deterrent by manufacturing, processing, and storing nuclear materials, reducing global nuclear threats, and providing fuel for the Naval Reactors program, all while ensuring safety, security, and environmental stewardship.
|ParentOrganization=National Nuclear Security Administration
|TopOrganization=Department of Energy
|Employees=4700
|Budget=$1.2 billion [2025 FY]
|OrganizationExecutive=Manager
|Services=Nuclear Material Processing; Component Manufacturing; Storage of Nuclear Materials; Environmental Management
|HeadquartersLocation=35.99168, -84.2524
|HeadquartersAddress=301 Bear Creek Road, Oak Ridge, TN 37830
|Website=https://www.y12.doe.gov
}}
{{Short description|US Energy Dept facility in Oak Ridge, Tennessee}}

[[File:Y-12 Aerial.jpg|thumb|Y-12 National Security Complex in Oak Ridge, Tennessee.]]

The '''Y-12 National Security Complex''' is a [[United States Department of Energy]] [[National Nuclear Security Administration]] facility located in [[Oak Ridge, Tennessee]], near the [[Oak Ridge National Laboratory]]. It was built as part of the [[Manhattan Project]] for the purpose of [[Enriched uranium|enriching uranium]] for the first atomic bombs.<ref>{{Cite magazine|url=https://newrepublic.com/article/120482/inside-oak-ridge-birthplace-atomic-bomb|title=A Visit to the Secret Town in Tennessee That Gave Birth to the Atomic Bomb|magazine=New Republic|access-date=2017-11-15|language=en-US}}</ref> In the years after World War II, it has been operated as a manufacturing facility for nuclear weapons components.

Y-12 is managed and operated under contract by [[Consolidated Nuclear Security]] (CNS), which is composed of member companies [[Bechtel]], [[Leidos]], [[Orbital ATK]], and [[Day & Zimmermann|SOC]], with [[Booz Allen Hamilton]] as a teaming subcontractor.<ref name=":0">{{Cite web|url=http://cns-llc.us/about|title=About|website=CNS – Consolidated Nuclear Security, LLC|access-date=2017-09-09}}</ref> CNS also operates the [[Pantex]] in Texas, the primary United States nuclear weapons assembly and disassembly facility.<ref>{{cite web|url=http://cns-llc.us/the-cns-team/ |title=The CNS team – key leadership|access-date=2014-09-20 |url-status=dead |archive-url=https://web.archive.org/web/20140910215722/http://cns-llc.us/the-cns-team/ |archive-date=2014-09-10}}</ref>