Sludge Batch 6/Tank 51 Simulant Chemical Process Cell Simulations

Sludge Batch 6 Phase Ii Flowsheet Simulations

“…SB6-11 apparently required significantly less time assuming the missing mercury has been stripped successfully. Generally comparable mercury sample results were obtained on the first pair of tests with SB6 qualification simulant (at 103% and 150% acid, reported separately) 11 , though there were quantitative differences in removal rates. Data from acid window studies for SB5 seem to confirm that the mercury content of the SRAT product slurry decreases with increasing acid stoichiometry.…”

Behavior of Mercury During DWPF Chemical Process Cell Processing

“…Mercurous nitrate is a crystalline compound similar to the deposits that were found in the DWPF GC filter assembly HEME and High Efficiency Particulate Air (HEPA) filters in 2009. 16 The compounds found in the filter assemblies were identified to be the mercurous nitrate hydroxides Hg 4 In a study of Raman spectra of mercurous compounds, four different mercury nitrate hydroxides were described, including methods to create them. 17 The compounds that were created are given in Table 2-1.…”

Sludge Batch 6/Tank 40 Simulant Chemical Process Cell Simulations

“…The SB6 qualification simulant testing confirmed the formation of significant ammonium ion at the mercury and noble metal levels being used, as well as that the quantity depended on acid stoichiometry. 15 Runs with significant ammonium ion formation tended to have negative values for the calculated nitrite-to-nitrate conversion percentage, indicating a net loss of nitrate ion. Formate losses and CO 2 production were fairly high at the higher acid stoichiometries.…”

“…14 In the qualification study run at 150% stoichiometry, at least 15% of the initial nitrate was converted to ammonium. 15 These earlier tests did not have ammonia scrubbers. Although ammonia was absorbed by the FAVC condensate in both cases, it is not clear how this would compare to the performance of the ammonia scrubber in the Phase III work in terms of ammonia recovery efficiency.…”

“…An increase in CO 2 with increasing stoichiometry was expected here, since an increase by a factor of 2.13 was seen from 100% to 150% in the qualification simulant testing. 15 The likely explanation is the additional CO 2 produced during ammonia formation. The CO 2 masses are smaller than the formate losses.…”