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Measurement of63Ni in highly radioactive Hanford waste by liquid scintillation counting

  • Radionuclide Studies
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Abstract

Characterization of high-activity radioactive waste stored in underground tanks at Hanford requires determining63Ni (100 y). This low-energy β-emitter (Emax 67 keV) must be separated with a high degree of radiochemical purity large amounts of other fission and activation products. The method to be discussed involves multiple precipitation steps with several holdback carriers added, followed by precipitations with dimethylglyoxime, ion exchange, and electrodeposition. The59Ni activity is determined by low-energy photon spectrometry. The sample is then stripped from the counting disk with HNO3, converted to the chloride form, and the63Ni β-spectrum is measured with high efficiency by liquid scintillation counting.

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References

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Authors and Affiliations

  1. Pacific Northwest Laboratory, P.O. Box 999, 99352, Richland, WA, (USA)

    J. H. Kaye & R. S. Strebin

  2. NORCUS (Northwest College and University Association for Science), University of Washington, Seattle, WA, (USA)

    A. E. Nevissi

Authors
  1. J. H. Kaye
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  2. R. S. Strebin
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  3. A. E. Nevissi
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Additional information

Pacific Northwest Laboratory is operated for the U.S. Department of Energy under Contract DE-AC06-76RLO-1830.

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Kaye, J.H., Strebin, R.S. & Nevissi, A.E. Measurement of63Ni in highly radioactive Hanford waste by liquid scintillation counting. Journal of Radioanalytical and Nuclear Chemistry, Articles 180, 197–200 (1994). https://doi.org/10.1007/BF02035906

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  • DOI: https://doi.org/10.1007/BF02035906

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