Precipitation of metal nitrides from chloride melts

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Description

Precipitation of actinides, lanthanides, and fission products as nitrides from molten chloride melts is being investigated for use as a final cleanup step in treating radioactive salt wastes generated by electrometallurgical processing of spent nuclear fuel. The radioactive components (eg, fission products) need to be removed to reduce the volume of high-level waste that requires disposal. To extract the fission products from the salt, a nitride precipitation process is being developed. The salt waste is first contacted with a molten metal; after equilibrium is reached, a nitride is added to the metal phase. The insoluble nitrides can be recovered and ... continued below

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8 p.

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Slater, S.A.; Miller, W.E. & Willit, J.L. December 31, 1996.

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Description

Precipitation of actinides, lanthanides, and fission products as nitrides from molten chloride melts is being investigated for use as a final cleanup step in treating radioactive salt wastes generated by electrometallurgical processing of spent nuclear fuel. The radioactive components (eg, fission products) need to be removed to reduce the volume of high-level waste that requires disposal. To extract the fission products from the salt, a nitride precipitation process is being developed. The salt waste is first contacted with a molten metal; after equilibrium is reached, a nitride is added to the metal phase. The insoluble nitrides can be recovered and converted to a borosilicate glass after air oxidation. For a bench-scale experimental setup, a crucible was designed to contact the salt and metal phases. Solubility tests were performed with candidate nitrides and metal nitrides for which there are no solubility data. Experiments were performed to assess feasibility of precipitation of metal nitrides from chloride melts.

Physical Description

8 p.

Notes

INIS; OSTI as DE97001246

Source

  • Annual meeting of the American Institute of Chemical Engineers (AIChE), Chicago, IL (United States), 10-15 Nov 1996

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  • Other: DE97001246
  • Report No.: ANL/CMT/CP--89614
  • Report No.: CONF-961108--4
  • Grant Number: W-31109-ENG-38
  • Office of Scientific & Technical Information Report Number: 436274
  • Archival Resource Key: ark:/67531/metadc686628

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  • December 31, 1996

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  • July 25, 2015, 2:20 a.m.

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  • Dec. 14, 2015, 6:48 p.m.

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Slater, S.A.; Miller, W.E. & Willit, J.L. Precipitation of metal nitrides from chloride melts, article, December 31, 1996; Illinois. (digital.library.unt.edu/ark:/67531/metadc686628/: accessed August 16, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.