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Conceptual Design of a Cover System for the Degmay Uranium Tailings Site
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 Title & Authors
Conceptual Design of a Cover System for the Degmay Uranium Tailings Site
Saidov, Vaysidin; Kessel, David S.; Kim, Chang-Lak;
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 Abstract
The Republic of Tajikistan has ten former uranium mining sites. The total volume of all tailings is approximately 55 million tonnes, and the covered area is more than 200 hectares. The safe management of legacy uranium mining and tailing sites has become an issue of concern. Depending on the performance requirements and site-specific conditions (location in an arid, semiarid or humid region), a cover system for uranium tailings sites could be constructed using several material layers using both natural and man-made materials. The purpose of this study is to find a feasible cost-effective cover system design for the Degmay uranium tailings site which could provide a long period (100 years) of protection. The HELP computer code was used in the evaluation of potential Degmay cover system designs. As a result of this study, a cover system with 70 cm thick percolation layer, 30 cm thick drainage layer, geomembrane liner and 60 cm thick barrier soil layer is recommended because it minimizes cover thickness and would be the most cost-effective design.
 Keywords
Cover system;Uranium tailings sites;Remediation;Percolation;HELP code;
 Language
English
 Cited by
 References
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International Atomic Energy Agency. Assessment and Proposals for Uranium Production Legacy Sites in Central Asia: An International Approach, IAEA Report (2010).

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P.R. Schroeder, T.S. Dozier, P.A. Zappi, B.M. McEnroe, J.W. Sjostrom, and R.L. Peyton. The Hydrologic Evaluation of Landfill Performance (HELP) Model: Engineering Documentation for Version 3, U.S. Environmental Protection Agency Report, EPA/600/R-94/168b (1994).