Actinide partitioning from actual Idaho chemical processing plant acidic tank waste using centrifugal contactors

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Description

The TRUEX process is being evaluated at the Idaho Chemical Processing Plant (ICPP) for the separation of the actinides from acidic radioactive wastes stored at the ICPP. These efforts have culminated in a recent demonstration of the TRUEX process with actual tank waste. This demonstration was performed using 24 stages of 2-cm diameter centrifugal contactors installed in a shielded hot cell at the ICPP Remote Analytical Laboratory. An overall removal efficiency of 99.97% was obtained for the actinides. As a result, the activity of the actinides was reduced from 457 nCi/g in the feed to 0.12 nCi/g in the aqueous ... continued below

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6 p.

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Law, J.D.; Brewer, K.N. & Todd, T.A. October 1, 1997.

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Description

The TRUEX process is being evaluated at the Idaho Chemical Processing Plant (ICPP) for the separation of the actinides from acidic radioactive wastes stored at the ICPP. These efforts have culminated in a recent demonstration of the TRUEX process with actual tank waste. This demonstration was performed using 24 stages of 2-cm diameter centrifugal contactors installed in a shielded hot cell at the ICPP Remote Analytical Laboratory. An overall removal efficiency of 99.97% was obtained for the actinides. As a result, the activity of the actinides was reduced from 457 nCi/g in the feed to 0.12 nCi/g in the aqueous raffinate, which is well below the U.S. NRC Class A LLW requirement of 10 nCi/g for non-TRU waste. Iron was partially extracted by the TRUEX solvent, resulting in 23% of the Fe exiting in the strip product. Mercury was also extracted by the TRUEX solvent (76%) and stripped from the solvent in the 0.25 M Na{sub 2}CO{sub 3} wash section.

Physical Description

6 p.

Notes

INIS; OSTI as DE98050471

Source

  • GLOBAL `97: international conference on future nuclear systems, Yokohama (Japan), 5-10 Oct 1997

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  • Other: DE98050471
  • Report No.: INEL/CON--97-00705
  • Report No.: CONF-971004--
  • Grant Number: AC07-94ID13223
  • Office of Scientific & Technical Information Report Number: 565348
  • Archival Resource Key: ark:/67531/metadc695570

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  • October 1, 1997

Added to The UNT Digital Library

  • Aug. 14, 2015, 8:43 a.m.

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  • June 14, 2016, 1:52 p.m.

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Law, J.D.; Brewer, K.N. & Todd, T.A. Actinide partitioning from actual Idaho chemical processing plant acidic tank waste using centrifugal contactors, article, October 1, 1997; Idaho Falls, Idaho. (digital.library.unt.edu/ark:/67531/metadc695570/: accessed September 22, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.