“…The glass pump was effective as melt rate increased by about 5 -10%. [9] Although the glass pump was effective, SRR and its partner EnergySolutions, designed glass bubbler tubes for implementation into a pre-existing melter design. Bubblers were implemented into Melter #2 (September 2010) with the transition to processing of SB7a, and have consistently provided a positive impact on melt rate.…”