|About this Abstract
||Materials Science & Technology 2012
||Materials Issues in Nuclear Waste Management in the 21st Century
||Development of Structure in Saltstone Grout Slurries
||Marissa Reigel, Bradly Pickenheim, Erich Hansen
|On-Site Speaker (Planned)
The Saltstone Production Facility (SPF) at the Savannah River Site mixes radioactive salt solution with cementitious dry feeds to produce fresh Saltstone that is transferred to disposal units for permanent disposal. Understanding structure and yield stress development of the cementious slurry is critical to SPF operation and performance of the waste-form in the disposal units. Currently, a static pouring technique has been used to monitor structure formation in the slurry; however, this measurement is subjective and has limited applicability to the SPF. A rotating vane rheology measurement has been created to monitor the yield stress development in the fresh Saltstone slurry. The time at which the slurry develops a yield stress equal to the maximum processing pressures in the facility is the amount of time fresh grout can remain in the SPF piping. The slurry rheological properties can also indicate settling which can influence the cured Saltstone performance properties.