|About this Abstract
||Materials Science & Technology 2011
||MS&T'11 Poster Session
||094 Isotopic Enrichment Studies to Determine Elemental Diffusion Profiles Through an Established Alteration Layer
||Joseph Ryan, A. Mitroshkov, Z. Zhu, C. Rodriguez, J. Neeway
|On-Site Speaker (Planned)
Research into new spent nuclear fuel cycles by the Department of Energy Fuel Cycle R&D program may result in a repository inventory where HLW glass would play a deterministic role in models of radionuclide release. One of the key remaining questions is the mechanism and extent by which alteration layers present a barrier to corrosion. In order to investigate the diffusion of ions and their rate of dissolution/reprecipitation from glasses in a mature state of corrosion, isotopically enriched glasses and those with natural elemental abundances were both synthesized and allowed to corrode in equivalent conditions. Following the development of a mature alteration layer, the solutions were swapped and the diffusion of individual isotopes through the corrosion products monitored. In this manner, reactions to and from a solution can be monitored without chemical disruption. We present the initial data from the solution and surface characterization after the solution swap.