The Impact of the Source of Alkali on Sludge Batch 3 Melt Rate (U)

Investigation of high‐level waste glass melting using X‐ray computed tomography

“…The impact of gas evolution on melting rate is also shown in an earlier MRF study, 6 where the SB3 simulant was melted with frits containing from 0 to 16 wt% Na 2 O at 4 wt% increments, while adjusting the sodium content in the sludge to maintain the same Na 2 O content in glass. The results showed that when the sludge was completely depleted of sodium (ie, 16 wt% Na 2 O in frit), the feed became too refractory (ie, not enough fluxes) and melting rate was the lowest of all cases.…”

“…[2][3][4][5][6][7][8][9][10] For example, feeds with high salt and/or multivalent metal contents can foam severely as a result of excessive gas evolution during calcination and reduction/oxidation (REDOX) reactions in the cold cap. [2][3][4][5][6][7][8][9][10] For example, feeds with high salt and/or multivalent metal contents can foam severely as a result of excessive gas evolution during calcination and reduction/oxidation (REDOX) reactions in the cold cap.…”

“…[2][3][4][5][6][7] For example, the method determined that reducing the Na 2 O content of Frit 418 from 8 to 6 wt% and replacing it with 2 wt% MgO for the SB3 melter feed would result in a 10%-30% reduction in melting rate, 5 which was confirmed during DWPF processing based on canister production rates. [2][3][4][5][6][7] For example, the method determined that reducing the Na 2 O content of Frit 418 from 8 to 6 wt% and replacing it with 2 wt% MgO for the SB3 melter feed would result in a 10%-30% reduction in melting rate, 5 which was confirmed during DWPF processing based on canister production rates.…”

Initial SB4 Melt Rate Furnace Testing (U)

“…All MRF melt rate data in the document is reported as linear melt rate (LMR -inches/hr). 9 The results show that the impact of washing on SB4 was minimal (if any). This was not unexpected due to the similarity (see Table 2-1) of the targeted baseline and one less washed SB4 sludge compositions.…”

“…Therefore the first 2% TiO 2 MRF test appears to have been an outlier. Based on the expected range of LMR's for a particular feed, 9 the results indicate that the addition of the MST stream will not negatively impact SB4 melt rate (when compared to SB4/Frit 320).…”