Initial Characterizations and Srat Simulations of Four Sludge Matrix Study Simulants

Determination of HLW Glass Melt Rate Using X-Ray Computed Tomography

“…One of the advantages of the wavelet analysis is the visualization of the WT modulus in a k-R plot, which provides an easy way to interpret the results. Our analysis of EXAFS data for Pu and Hf were performed using the FORTRAN program HAMA employing Morlet wavelet algorithm [6]. The Morlet wavelet is well-suited for EXAFS signal since it consists of a slowly varying amplitude term and a fast oscillating phase term.…”

“…Four of those were based on the sludge simulants with bounding concentrations of six most abundant metals. 6 The fifth was the same Sludge Batch 6 (SB6) simulant used in the pilot-scale DWPF melter bubbler tests. 7 Each SRAT product was blended with a select glass-forming frit according to a m ass ratio set by the targeted waste oxide loading in glass and measured calcination ratio of each SRAT product.…”

Glycolic-Nitric Acid Flowsheet Demonstration of the DWPF Chemical Processing Cell With Matrix Simulants and Supernate

“…The noble metals were added at the same concentrations as were used in previous high noble metal tests of the matrix sludges. 15 Cr is typically at least an order of magnitude lower in concentration than the semi-major elements. It was considered potentially significant, however, due to its several oxidation states and was added to the Mg-Ni pair.…”

“…These simulants have been used in other SRNL studies, and the composition has been previously measured. 6,14 These simulants were used to demonstrate the flowsheet across a broad compositional range.…”

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

“…The first four simulants have bounding concentrations of the six most abundant metals found in SRS waste. 20 Each pretreated simulant was blended with a prefabricated frit (sieved to À210/+74 lm mesh size) in a ratio set by the target WL in glass. Mn and Ca were varied together between high and low as a pair as were Mg and Ni but in the opposite direction.…”