Analytical Results of DWPF Glass Sample Taken During Filling of Canister S01913

Abstract

• The Defense Waste Processing Facility (DWPF) began processing Sludge Batch 2 (SB2) (Macrobatch 3) in December 2001 as part of Sludge Receipt and Adjustment Tank (SRAT) Batch 208. Macrobatch 3 consists of the contents of Tank 40 and Tank 8 in approximately equal proportions. A glass sample was obtained while pouring Canister S01913 and was sent to the Savannah River National Laboratory (SRNL) Shielded Cells for characterization. This report contains observations of the glass sample, results for the density, the chemical composition, the Product Consistency Test (PCT) and the radionuclide results needed for the Production Record for Canister S01913.

Analysis of Sludge Batch 3 (Macrobatch4) DWPF Pour Stream Glass Sample for Canister s02312

“…Silicon indicates a lower dissolution rate for the glass because some of the silicon is retained in an altered layer on the glass. This has been observed in previous DWPF glass samples 19,20,21,22,23 and was found for the EA glass. Because SB3 contained additional Np, U, Pu, Am and Cm that was added from the SRS Canyons to the Tank Farm during the formation of SB3 it was decided to measure the normalized releases of these elements from the glass.…”

Retention of Sulfate in Savannah River Site High‐Level Radioactive Waste Glass

“…Although the experimental methods used differ considerably from full-scale melter conditions, a good correlation has typically been shown between laboratory studies and the full-scale melter operation. 30,31 The first series of tests identified increased concentrations of B 2 O 3 and CaO in the frit as being beneficial for sulfate retention for SB6, while increased Na 2 O in the frit had a negative effect. These trends continued for glasses prepared with the same frits when the concen-trations of the major components of the waste (Al 2 O 3 , Fe 2 O 3 , and Na 2 O) were varied.…”

“…Despite these differences, this type of laboratoryscale work has typically been shown to correlate well with data from glass taken from the full-scale melter. 30,31 Future studies will focus on methods to develop a general sulfate limit for borosilicate waste glass produced at the DWPF that is not dependent on the individual waste batch being processed, and further understanding of the impacts of B 2 O 3 and CaO in the frit on improved sulfate retention.…”

Investigation of Sludge Batch 3 (Macrobatch 4) Glass Sample Anomalous Behavior

“…The initial bulk glass sample designated for analysis was not washed prior to grinding, but its appearance was black and shiny as observed for other glass samples received 2,3,4,5,6 . Figure 2-1 shows 33.959 g of glass S02244 as received from DWPF after removal from the primary container, PC0016.…”