|About this Abstract
||Materials Science & Technology 2019
||Materials Issues in Nuclear Waste Management
||The Influence of Reducing Conditions on the Stabilization of Iodine Containing Solid Secondary Wastes
||Matthew Asmussen, Sarah Saslow, James Neeway, Joseph Westsik, Gary L. Smith
|On-Site Speaker (Planned)
During vitrification activities at WTP at the U.S. DOE’s Hanford site many classes of solid secondary wastes (SSW) will be generated. The radioisotope iodine-129 will be present on several SSW streams including silver mordenite (AgZ) and granular activated carbon (GAC). The baseline disposal pathway for these two non-debris waste streams is stabilization/blending into a cementitious waste form and disposed of in shallow subsurface disposal at Hanford. The formulation to be used for the final waste form for these two streams has yet to be identified and little data exists on representative waste form systems. Both reduced (containing blast furnace slag) and oxidized (no slag) are candidates for use to stabilize the AgZ and GAC. This presentation will cover characterization of candidate formulations, their ability to stabilize AgZ and GAC and the leachability of iodine from stabilized AgZ and GAC.