Simulation and characterization of a Hanford high-level waste slurry

Abstract

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Hanford tank waste simulants specification and their applicability for the retrieval, pretreatment, and vitrification processes

“…For example, a HLW blend simulant for use in vitilcation tests was based on estimates of the pretreated HLW sludge composition for tanks AZ-101, AZ-102, C-106 and AY-102 (Russell and Smith 1996). These simulants were a slumy precipitate of metal hydroxides, which in some cases were mixed with glass pre-cursor material (e.g., H@O~, SiOz, CaCO~, etc.)…”

“…The procedure involved the addition of sodium hydroxide to metal nitrate solutions to form precipitates and to adjust the concentration of other components by directly adding the oxides, hydroxides, fluorides, and sulfates of those elements to match the chemical composition of the NCAW waste. Similar procedures were used to prepare double shell tank/single shell tank waste blend (Tracy et al 1995) and request for proposal blend @?P) (Russell and Smith 1996). In the following sections, the simulant specification for these three types of HLW slurry waste simulants is presented.…”

“…The simukmt composition emulates the elemental composition of a calculated pretreated waste blend from tanks 101-AZ, 102-AZ, 106-C and 102-AY. The composition of this simulant is reported in Russell and Smith 1996. The blended waste simukmt specification is written to prepare 1000 L of simulant slurry at 100 g waste oxide/L.…”