Independent Assessment of Conduct of Operations at the Y-12 National Security Complex Building 9215

August 2025,

Independent Assessment of Conduct of Operations at the Y-12 National Security Complex Building 9215 - July 2025

The U.S. Department of Energy Office of Enterprise Assessments (EA) conducted an independent assessment of the implementation of the conduct of operations program at the Y-12 National Security Complex (Y-12) Building 9215. This assessment focused on depleted uranium operations in the Building 9215 Complex, which consists of interfacing facilities including Buildings 9212, 9215, 9996, and 9998. Hereafter, this suite of facilities will be referred to as the 9215 Complex. Consolidated Nuclear Security, LLC (CNS) is the management and operating contractor at Y-12, with the National Nuclear Security Administration Y-12 Field Office (YFO) having field element oversight responsibilities. The assessment also evaluated the effectiveness of YFO oversight of the CNS conduct of operations program implementation. The assessment was conducted in March and April 2025.