Material Control & Accountability Activities Associated with the FB-Line

The Savannah River Site (SRS) is currently in the process of Deactivation and Decommissioning (D&D) several processing areas on site. One of these areas is the 221-F Canyon Complex which includes the FB-Line Material Balance Area (MBA). This paper addresses the Material Control and Accountability (MC&A) activities that were developed and implemented to downgrade the FB-Line MBA from an active Category I facility to an inactive Category IV MBA. MC&A downgrade requirements developed address topical areas that can impact final facility closure milestones. Final operational activities to process the remaining nuclear material in the facility needed to be coordinated with MC&A closure activities to minimize the amount of time and cost associated with the closure of the FB-Line facility. MC&A activities that needed to be addressed included: the decommissioning of process areas, transfer of accountable nuclear material to other facilities, the material hold-up measurements required once process areas were shut down, the access requirements to nuclear material during the final processing and simultaneous closure of processing areas, the usage of enhanced material surveillance requirements to improve the utilization of Operations personnel, the updating and record retention for accountability records, the transition to a lower category MBA for final deactivation activities which included phasing out security force personnel, and the establishment of an administrative/inactive MBA once all deactivation activities were completed.