Impact of Reducing the 100 C Liquidus Temperature Offset on Waste Loading Targets

Mar Assessments of the High Level Waste System Plan Revision 16

“…However, higher processing risk could take the form of reducing the current T L off-set from 100°C to some lower value or selecting a system in which only a limited number of EVs fail T L at WLs of interest based on the Variation Stage assessment. Peeler and Edwards 10 have shown the impact of reducing the T L off-set from 100°C to 50°C (while still applying the same PAR and MAR uncertainties) on increasing the accessibility to higher WLs for T L -limited systems. In that assessment, reducing the T L off-set resulted in an increase in the operating windows for some systems by up to 8 WL points.…”

“…For example, consider the two frits ("10,4,8,78" and "16,2,9,73") shown in Table 11 for SB9 (sludge-only and SWPF). Using the frit with 10 wt % B 2 O 3 (10,4,8,78), the projected operating windows for sludge-only and SWPF are 30-47 and 30-48% WL, respectively. As the B 2 O 3 content increases to 16 wt %, the projected operating windows are only slightly reduced for sludge-only and SWPF at 27-45 and 27-46% WL, respectively.…”

Impacts of Small Column Ion Exchange Streams on DWPF Glass Formulation: Kt01, Kt02, Kt03, and Kt04-Series Glass Compositions

“…This provides a 100 °C margin of safety below the nominal melt pool temperature of 1150 °C before crystallization of spinels is predicted to occur. a a Note that a reduction in the magnitude of the T L margin (or increase in the allowable predicted T L ) was proposed at the time the current model was developed, 11 and has recently been proposed again, 12 to allow DWPF access to higher waste loadings.…”