Experiences with confirmatory measurements at the Savannah River Plant

Confirmatory measurements are performed on all Category I and II plutonium shipments to the Savannah River Plant (SRP). The primary technique employed has been neutron coincidence counting using three instruments; two slab counters, and a well counter. These measurements have provided the required safeguards features to support the physical security measures already in place for inter-site shipments of special nuclear material (SNM). Similar confirmatory measurements have also been performed on a variety of scrap mixed-oxide materials stored at SRP for later processing. The data handling and results for several categories of material are examined in addition to planned uses of the Rocky Flats Plant (RFP)/SRP Confirmatory Measurements Counter