A case study: using a multi-grout barrier to control {sup 90}Sr release at ORNL

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During summer 1996, low-pressure permeation grouting was performed inside portions of four unlined, shallow waste disposal trenches at a radioactive waste burial ground that was opened in 1951 at the Oak Ridge National Laboratory (ORNL). The objective was to selectively control sources that release about 25 percent of all strontium 90 (90Sr) discharged from the ORNL complex. A unique grouting methodology was adapted to control interaction of wastes with natural runoff at this humid site. Driven sleeve pipes were injected 4 to 5 times with multiple formulae of type III portland cement- based grouts, ultra fine cement-based grouts, and acrylamide ... continued below

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8 p.

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Long, J.D.; Huff, D.D. & Naudts, A.A. February 1, 1997.

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  • Long, J.D.
  • Huff, D.D. Lockheed Martin Energy Systems, Inc., Oak Ridge, TN (United States)
  • Naudts, A.A. ECO Grouting Specialists, Ltd, Cheltenham, Ontario, (Canada)

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Description

During summer 1996, low-pressure permeation grouting was performed inside portions of four unlined, shallow waste disposal trenches at a radioactive waste burial ground that was opened in 1951 at the Oak Ridge National Laboratory (ORNL). The objective was to selectively control sources that release about 25 percent of all strontium 90 (90Sr) discharged from the ORNL complex. A unique grouting methodology was adapted to control interaction of wastes with natural runoff at this humid site. Driven sleeve pipes were injected 4 to 5 times with multiple formulae of type III portland cement- based grouts, ultra fine cement-based grouts, and acrylamide grouts. Multiple-hole grout injection was monitored continuously using real time monitoring equipment. Apparent Lugeon values were calculated during grouting operations and grout formulae were continually adjusted during injection to maximize permeation, durability, and economy. Over 500 cubic meters of combined grout types were emplaced. At the completion of production grouting, the effectiveness of grout spread and in situ hydraulic conductivity of the grouted mass were assessed. The average residual hydraulic conductivity measured in more than 20 check pipes was less than I x 10` cm/sec. Hydrologic monitoring has been established to determine the overall effectiveness of the project for 9OSr control.

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8 p.

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INIS; OSTI as DE97003335

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  • International containment technology conference and exhibition, St. Petersburg, FL (United States), 9-12 Feb 1997

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  • Other: DE97003335
  • Report No.: CONF-970208--7
  • Grant Number: AC05-96OR22464
  • Office of Scientific & Technical Information Report Number: 459324
  • Archival Resource Key: ark:/67531/metadc683561

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Office of Scientific & Technical Information Technical Reports

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

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Creation Date

  • February 1, 1997

Added to The UNT Digital Library

  • July 25, 2015, 2:21 a.m.

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  • June 14, 2016, 2:16 p.m.

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Long, J.D.; Huff, D.D. & Naudts, A.A. A case study: using a multi-grout barrier to control {sup 90}Sr release at ORNL, article, February 1, 1997; Tennessee. (digital.library.unt.edu/ark:/67531/metadc683561/: accessed December 17, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.