Tbd Materials At Y-12 National Security Complex

TBD Materials at Y-12 National Security ComplexAdam BruceY-12 National Security ComplexNuclear materials that no longer have programmatic use for associated Department of Energy (DOE)/National Nuclear Security Administration (NNSA) programs and that have no identified disposition path are referred to by the To Be Determined (TBD) attribute as marked in the annual Nuclear Materials Inventory Assessment (NMIA). The Y-12 National Security Complex’s (Y12) initial evaluation of the items with a TBD disposition code in the recently submitted endoffiscal-year (EFY) 2019 NMIA involves making sure the TBD list is accurate, incorporating any changes to the items submitted in the EFY 2019 NMIA with a TBD disposition code, and working with the Savannah River Site (SRS) and various DOE/NNSA programs and projects within Y-12 on any remaining items with a TBD disposition code. This initial evaluation is the short-term goal for Y12 in managing disposition of the TBD items, and the first step, reviewing the accuracy of the TBD list, has already been completed. Y-12 was able to remove approximately 950 items from the TBD listing, leaving around 2,630 items for which disposition paths were needed. Of these 2,630 items, approximately 2,570 items have been reassigned to the correct disposition path. These items include highly enriched uranium (HEU), low-equity (LE) items, down-blend of tritium (DBOT) items, high-assay low enriched uranium (HA-LEU) material, and LEU from DOE/NNSA program offices. Still in need of appropriate disposition paths are HEU items, normal uranium items, and plutonium-239 items. The second step of the TBD process at Y-12 is reconciling the TBD items with the DOE program office to which they belong. This includes determination of correct disposition paths, identifying and characterizing issues with disposition paths, and leveraging other information analysis activities, such as the LE disposition list, Y-12 facility material studies, etc. A majority of the applicable DOE program office ownership reviews are complete, but one is still on-going.