Unreviewed Disposal Question Evaluation: Subsidence Study for Non-Crushable Containers in Slit Trenches (U)

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The Closure Plan for the E-Area low-level waste facility assumes that dynamic compaction performed at the end of the 100-year institutional control period will adequately stabilize all waste in Slit Trenches. However, some non-crushable waste containers with significant void space will not be stabilized by dynamic compaction. These non-crushable containers will gradually corrode, eventually collapse and cause the final closure cap to subside resulting in an increase of the infiltration rates. After subsidence occurs, the waste zone will be significantly reduced to concentrate waste in the lower portion of the slit trench, therefore increasing waste concentration. The trench subsidence may ... continued below

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THONG, HANG March 15, 2005.

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Description

The Closure Plan for the E-Area low-level waste facility assumes that dynamic compaction performed at the end of the 100-year institutional control period will adequately stabilize all waste in Slit Trenches. However, some non-crushable waste containers with significant void space will not be stabilized by dynamic compaction. These non-crushable containers will gradually corrode, eventually collapse and cause the final closure cap to subside resulting in an increase of the infiltration rates. After subsidence occurs, the waste zone will be significantly reduced to concentrate waste in the lower portion of the slit trench, therefore increasing waste concentration. The trench subsidence may have an adverse impact on the 1000-year compliance specified in DOE Order 435.1. This study addresses the issue of trench subsidence, evaluates the resulting concentrations at the hypothetical 100-m well against those obtained based on the PA approach, and provides the maximum number of trenches that can subside without causing the well concentrations to be out of compliance.

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  • Other Information: PBD: 15 Mar 2005

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  • Report No.: WSRC-TR-2005-00104
  • Grant Number: AC09-96SR18500
  • DOI: 10.2172/840797 | External Link
  • Office of Scientific & Technical Information Report Number: 840797
  • Archival Resource Key: ark:/67531/metadc782012

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  • March 15, 2005

Added to The UNT Digital Library

  • Dec. 3, 2015, 9:30 a.m.

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  • May 5, 2016, 5:56 p.m.

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THONG, HANG. Unreviewed Disposal Question Evaluation: Subsidence Study for Non-Crushable Containers in Slit Trenches (U), report, March 15, 2005; South Carolina. (digital.library.unt.edu/ark:/67531/metadc782012/: accessed August 18, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.