Grout Placement and Property Evaluation for Closing Hanford High-Level Waste Tanks - Scale-Up Testing

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Description

Hanford has 149 single-shell high level waste (HLW) tanks that were constructed between 1943 and 1964. Many of these tanks have leaked or are suspected of leaking HLW into the soil above the ground water. Consequently, a major effort is ongoing to transfer the liquid portion of the waste to the 28 newer, double-shell tanks. Savannah River National Laboratory (SRNL) was tasked to develop grout formulations for the three-layer closure concept selected by CH2M HILL for closing Tank C-106. These grout formulations were also evaluated for use as fill materials in the next six tanks scheduled to be closed. The ... continued below

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LANGTON, CHRISTINE December 15, 2003.

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Description

Hanford has 149 single-shell high level waste (HLW) tanks that were constructed between 1943 and 1964. Many of these tanks have leaked or are suspected of leaking HLW into the soil above the ground water. Consequently, a major effort is ongoing to transfer the liquid portion of the waste to the 28 newer, double-shell tanks. Savannah River National Laboratory (SRNL) was tasked to develop grout formulations for the three-layer closure concept selected by CH2M HILL for closing Tank C-106. These grout formulations were also evaluated for use as fill materials in the next six tanks scheduled to be closed. The overall scope consisted of both bench-scale testing to confirm mix designs and scale-up testing to confirm placement properties. This report provides results of the scale-up testing for the three-phase tank closure strategy. It also contains information on grouts for equipment and riser filling. The three-phase fill strategy is summarized as follows: Phase I fill encapsulates and minimizes dispersion of the residual waste in the tank. This fill is referred to as the Stabilization Layer and consists of the Stabilization Grout. The Phase II fill provides structural stability to the tank system and prevents subsidence. It is referred to as the Structural Layer and consists of the Structural Grout. A final Phase III fill consists of a grout designed to provide protection against intrusion and is referred to as the Capping Layer or Capping Grout.

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  • Other Information: PBD: 15 Dec 2003

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  • Report No.: WSRC-TR-2003-00556
  • Grant Number: AC09-96SR18500
  • DOI: 10.2172/828689 | External Link
  • Office of Scientific & Technical Information Report Number: 828689
  • Archival Resource Key: ark:/67531/metadc787973

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  • December 15, 2003

Added to The UNT Digital Library

  • Dec. 3, 2015, 9:30 a.m.

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  • May 5, 2016, 5:44 p.m.

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LANGTON, CHRISTINE. Grout Placement and Property Evaluation for Closing Hanford High-Level Waste Tanks - Scale-Up Testing, report, December 15, 2003; South Carolina. (digital.library.unt.edu/ark:/67531/metadc787973/: accessed September 23, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.