Independent Assessment of Safety System Management at the Nevada National Security Sites Device Assembly Facility
Office of Enterprise Assessments
May 6, 2024
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May 2024,
Independent Assessment of Safety System Management at the Nevada National Security Sites Device Assembly Facility
The U.S. Department of Energy (DOE) Office of Enterprise Assessments (EA) conducted an independent assessment of safety system management (SSM) at the Nevada National Security Sites (NNSS) Device Assembly Facility (DAF) from November 2023 to March 2024. Mission Support and Test Services, LLC (MSTS) manages the DAF under the direction and oversight of the National Nuclear Security Administration Nevada Field Office (NFO). This assessment was performed within the broader context of targeted SSM assessments at selected high risk (i.e., hazard category 1 and 2) nuclear facilities across the DOE complex. The purpose of the assessment was to evaluate whether the safety class blast door interlocks and fire dampers were appropriately functionally classified and are operated and maintained in a manner to ensure that they can reliably perform their intended function of protecting workers and the public from analyzed hazards.