Savannah River Site Salt Processing Project: FY2002 Research and Development Program Plan

Caustic-Side Solvent Extraction: Chemical and Physical Properties of the Optimized Solvent

“…Data for the solubility of BOBCalixC6 acquired and reported for the Salt Processing Program (SPP) alternative technology down-select decision showed the above composition is supersaturated with respect to BOBCalixC6 [11]. Although samples of the baseline solvent have been observed for approximately one year without any solids formation, the CSSX technical team recommended a solvent-composition optimization task be undertaken to address the BOBCalixC6 solubility and other issues [19] such as third-phase formation, as a function of the plant operating temperature.…”

“…In 2001 the USDOE selected the CSSX process flowsheet as the preferred technology for this application [4,5] following an evaluation of alternative technologies [6][7][8][9][10]. This selection was largely founded on extensive testing and demonstration data that successfully addressed four high technology risks, including chemical stability [11], radiation stability [11][12][13][14][15], proofof-concept demonstration with waste simulant [15], and demonstration with actual SRS high-level waste [16].…”

“…Extensive data characterizing the distribution behavior of major and minor system components in extraction, scrubbing, and stripping (ESS) were collected, and effective means for solvent cleanup were described [11]. As work for technology selection drew to a close in April 2001, issues for continued research and development (R&D) were identified [7,11], ultimately leading to renewed effort through the end of FY 2002 [18]. The most important issue regarding chemical and physical properties was the probable supersaturation of the solvent.…”

Status Assessment of Readiness to Deploy Permanganate Treatment for Removal of Strontium and Actinides from Savannah River Site High Level Waste

“…Realizing these limitations, the Salt Processing Project initiated extensive research and development efforts to identify alternate process options with much work scheduled in fiscal year 2002. 2 One process alternative uses the addition of sodium permanganate and non-radioactive strontium nitrate to replace MST. Prior research proves this process effective in the treatment of waste from the Hanford, Washington, site.…”

Study of the Potential Impact of Gamma-Induced Radiolytic Gases on Loading of Cesium Onto Crystalline Silicotitanate Sorbent at ORNL's High Flux Isotope Reactor

“…The overall SPP encompasses the selection, design, construction, and operation of facilities to treat the soluble HLW. 1 Following treatment, the decontaminated liquid would go to the site's Saltstone Facility, and the sludge would go to a borosilicate-based vitrification facility known as the Defense Waste…”