Vitrification of simulated radioactive Rocky Flats plutonium containing ash residue with a Stir Melter System

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Description

A demonstration trial has been completed in which a simulated Rocky Flats ash consisting of an industrial fly-ash material doped with cerium oxide was vitrified in an alloy tank Stir-Melter{trademark} System. The cerium oxide served as a substitute for plutonium oxide present in the actual Rocky Flats residue stream. The glass developed falls within the SiO{sub 2} + Al{sub 2}O{sub 3}/{Sigma}Alkali/B{sub 2}O{sub 3} system. The glass batch contained approximately 40 wt% of ash, the ash was modified to contain {approximately} 5 wt% CeO{sub 2} to simulate plutonium chemistry in the glass. The ash simulant was mixed with water and fed ... continued below

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10 p.

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Marra, J.C.; Kormanyos, K.R. & Overcamp, T.J. October 1, 1996.

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Description

A demonstration trial has been completed in which a simulated Rocky Flats ash consisting of an industrial fly-ash material doped with cerium oxide was vitrified in an alloy tank Stir-Melter{trademark} System. The cerium oxide served as a substitute for plutonium oxide present in the actual Rocky Flats residue stream. The glass developed falls within the SiO{sub 2} + Al{sub 2}O{sub 3}/{Sigma}Alkali/B{sub 2}O{sub 3} system. The glass batch contained approximately 40 wt% of ash, the ash was modified to contain {approximately} 5 wt% CeO{sub 2} to simulate plutonium chemistry in the glass. The ash simulant was mixed with water and fed to the Stir-Melter as a slurry with a 60 wt% water to 40 wt% solids ratio. Glass melting temperature was maintained at approximately 1,050 C during the melting trials. Melting rates as functions of impeller speed and slurry feed rate were determined. An optimal melting rate was established through a series of evolutionary variations of the control variables` settings. The optimal melting rate condition was used for a continuous six hour steady state run of the vitrification system. Glass mass flow rates of the melter were measured and correlated with the slurry feed mass flow. Melter off-gas was sampled for particulate and volatile species over a period of four hours during the steady state run. Glass composition and durability studies were run on samples collected during the steady state run.

Physical Description

10 p.

Notes

INIS; OSTI as DE97000419

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  • Other Information: PBD: [1996]

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  • Other: DE97000419
  • Report No.: WSRC-MS--96-0442
  • Grant Number: AC09-89SR18035
  • DOI: 10.2172/383595 | External Link
  • Office of Scientific & Technical Information Report Number: 383595
  • Archival Resource Key: ark:/67531/metadc678556

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  • October 1, 1996

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  • July 25, 2015, 2:20 a.m.

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  • Feb. 9, 2016, 7:33 p.m.

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Marra, J.C.; Kormanyos, K.R. & Overcamp, T.J. Vitrification of simulated radioactive Rocky Flats plutonium containing ash residue with a Stir Melter System, report, October 1, 1996; Aiken, South Carolina. (digital.library.unt.edu/ark:/67531/metadc678556/: accessed September 24, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.