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Decay-Series Disequilibrium Study of In Situ Long-Term Radionuclide Transport in Water-Rock Systems

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Abstract

Uranium and thorium-series disequilibrium in nature permits the determination of many in-situ physico-chemical, geologic and hydrologic variables that control the long-term migration of radionuclides in geologic systems. It also provides site-specific, natural analog information valuable to the assessment of geologic disposal of nuclear wastes. In this study, a model that relates the decay-series radioisotope distributions among solution, sorbed and solid phases in water-rock systems to processes of water transport, sorption-desorption, dissolution-precipitation, radioactive ingrowth-decay, and α recoil is discussed and applied to a basaltic aquifer at the Idaho National Engineering and Environmental Laboratory (INEEL), Idaho.

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Authors and Affiliations

  1. Dept. of Earth Sciences, Univ. of Southern California, Los Angeles, CA, 90089-0740, USA

    Shangde Luo & Teh-Lung Ku

  2. SMSJ 514, Los Alamos National Laboratory, Los Alamos, NM, 87545, USA

    Robert Roback & Micheal Murrell

  3. Idaho National Engineering and Environmental Laboratory, Idaho Falls, ID, 83415-2107, USA

    Travis L. McLing

Authors
  1. Shangde Luo
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  2. Teh-Lung Ku
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  3. Robert Roback
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  4. Micheal Murrell
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  5. Travis L. McLing
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Correspondence to Shangde Luo.

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Luo, S., Ku, TL., Roback, R. et al. Decay-Series Disequilibrium Study of In Situ Long-Term Radionuclide Transport in Water-Rock Systems. MRS Online Proceedings Library 608, 217 (1999). https://doi.org/10.1557/PROC-608-217

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  • DOI: https://doi.org/10.1557/PROC-608-217

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