MODELING OF THE SUB-SUFACE REDUCING ENVIRONMENT OF THE Z-AREA SALTSTONE DISPOSAL FACILITY AT THE SAVANNAH RIVER SITE

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Low-level radioactive liquid wastes at the U.S. Department of Energy Savannah River Site are treated by mixing the wastes with Saltstone grout to generate the Saltstone waste form that is poured into the concrete vaults for long-term disposal. The formula for Saltstone includes {approx}25 wt% slag to create a reducing environment for mitigating the sub-surface transport of several radionuclides, including Tc-99. A two-dimensional reactive transport model was developed to estimate how long the Z-Area Saltstone will maintain a reducing environment, and therefore its ability to request Tc-99. The model predicted that {approx}16% of the Saltstone reduction capacity would be consumed ... continued below

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Hang, T & Daniel Kaplan, D December 18, 2006.

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Low-level radioactive liquid wastes at the U.S. Department of Energy Savannah River Site are treated by mixing the wastes with Saltstone grout to generate the Saltstone waste form that is poured into the concrete vaults for long-term disposal. The formula for Saltstone includes {approx}25 wt% slag to create a reducing environment for mitigating the sub-surface transport of several radionuclides, including Tc-99. A two-dimensional reactive transport model was developed to estimate how long the Z-Area Saltstone will maintain a reducing environment, and therefore its ability to request Tc-99. The model predicted that {approx}16% of the Saltstone reduction capacity would be consumed after 213,000 years. Independent calculations published by other researchers yielded nearly identical results. The general modeling approach and the study results are presented in this paper.

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  • SCS Spring Simulation MultiConference

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  • Report No.: WSRC-STI-2006-00367
  • Grant Number: DE-AC09-96SR18500
  • Office of Scientific & Technical Information Report Number: 898077
  • Archival Resource Key: ark:/67531/metadc883701

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  • December 18, 2006

Added to The UNT Digital Library

  • Sept. 22, 2016, 2:13 a.m.

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  • Nov. 2, 2016, 3:43 p.m.

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Hang, T & Daniel Kaplan, D. MODELING OF THE SUB-SUFACE REDUCING ENVIRONMENT OF THE Z-AREA SALTSTONE DISPOSAL FACILITY AT THE SAVANNAH RIVER SITE, article, December 18, 2006; [Aiken, South Carolina]. (digital.library.unt.edu/ark:/67531/metadc883701/: accessed October 19, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.