Interpretation and modeling of a subsurface injection test, 200 East Area, Hanford, Washington

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A tracer experiment was conducted in 1980 and 1981 in the unsaturated zone in the southeast portion of the Hanford 200 East Area near the Plutonium-Uranium Extraction (PUREX) facility. The field design consisted of a central injection well with 32 monitoring wells within an 8-m radius. Water containing radioactive and other tracers was injected weekly during the experiment. The unique features of the experiment were the documented control of the inputs, the experiment`s three-dimensional nature, the in-situ measurement of radioactive tracers, and the use of multiple injections. The spacing of the test wells provided reasonable lag distribution for spatial correlation ... continued below

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38 p.

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Smoot, J.L. & Lu, A.H. November 1, 1994.

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  • Smoot, J.L. Pacific Northwest Lab., Richland, WA (United States)
  • Lu, A.H. Westinghouse Hanford Co., Richland, WA (United States)

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  • Pacific Northwest Laboratory
    Publisher Info: Pacific Northwest Lab., Richland, WA (United States)
    Place of Publication: Richland, Washington

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Description

A tracer experiment was conducted in 1980 and 1981 in the unsaturated zone in the southeast portion of the Hanford 200 East Area near the Plutonium-Uranium Extraction (PUREX) facility. The field design consisted of a central injection well with 32 monitoring wells within an 8-m radius. Water containing radioactive and other tracers was injected weekly during the experiment. The unique features of the experiment were the documented control of the inputs, the experiment`s three-dimensional nature, the in-situ measurement of radioactive tracers, and the use of multiple injections. The spacing of the test wells provided reasonable lag distribution for spatial correlation analysis. Preliminary analyses indicated spatial correlation on the order of 400 to 500 cm in the vertical direction. Previous researchers found that two-dimensional axisymmetric modeling of moisture content generally underpredicts lateral spreading and overpredicts vertical movement of the injected water. Incorporation of anisotropic hydraulic properties resulted in the best model predictions. Three-dimensional modeling incorporated the geologic heterogeneity of discontinuous layers and lenses of sediment apparent in the site geology. Model results were compared statistically with measured experimental data and indicate reasonably good agreement with vertical and lateral field moisture distributions.

Physical Description

38 p.

Notes

INIS; OSTI as DE95007752

Source

  • 33. Hanford symposium on health and the environment: symposium on in-situ remediation--scientific basis for current and future technologies, Richland, WA (United States), 7-11 Nov 1994

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  • Other: DE95007752
  • Report No.: PNL-SA--24843
  • Report No.: CONF-941124--19
  • Grant Number: AC06-76RL01830
  • Office of Scientific & Technical Information Report Number: 28332
  • Archival Resource Key: ark:/67531/metadc671384

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Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

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Creation Date

  • November 1, 1994

Added to The UNT Digital Library

  • June 29, 2015, 9:42 p.m.

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  • April 7, 2016, 4:43 p.m.

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Smoot, J.L. & Lu, A.H. Interpretation and modeling of a subsurface injection test, 200 East Area, Hanford, Washington, article, November 1, 1994; Richland, Washington. (digital.library.unt.edu/ark:/67531/metadc671384/: accessed June 18, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.