Sludge Batch 4: Model Based Assessments of the February 2007 Sludge Projection

Mar Assessments of the High Level Waste System Plan Revision 16

“…7,8 The primary differences have been a transition in: (1) applying variation to only a sludge-only projection instead of both sludgeonly and coupled projections and (2) what has been (or is being) defined as an acceptable WL interval for the Nominal Stage assessment. In previous studies, an "acceptable" operating window for the Nominal Stage assessment was based on a minimum 25% WL up to a WL in the low 40s.…”

“…The Li 2 O concentrations are also relatively low (3 or 4 wt %) and may result in T L model applicability concerns over a portion of the WL interval being assessed. 8,4,12,76 High η 26-49 Low η…”

“…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.…”