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Soil characterization in and around a proposed waste disposal facility at Nuclear Fuel Complex, Hyderabad, India

Singh, Amrit Pal, Chopra, Manish, Sunny, Faby, Vinod Kumar, A., Oza, R. B., Suryanarayana, D. S.
Environmental earth sciences 2016 v.75 no.6 pp. 540
bulk density, groundwater, hydraulic conductivity, leaching, nuclear fuels, porosity, probability, radiolabeling, radionuclides, soil sampling, solid wastes, waste disposal, wells, India
Generation of site-specific hydrogeological parameters such as porosity, bulk density, hydraulic conductivity, pore water velocity, etc. are the pre-requisites to carry out studies on the low probability event of migration of radionuclides along with groundwater due to long-term leaching from a waste disposal site. In the present work, the hydrogeological parameters are estimated for soil samples collected from various locations in and around a proposed solid waste disposal site at the Nuclear Fuel Complex, Hyderabad, India. The groundwater velocity is estimated using Darcy’s law. The range of values for hydraulic conductivity, porosity, and bulk density are determined to be 16.24–76.90 m day⁻¹ (average 48.12 m day⁻¹), 0.42–0.53 (average 0.47), and 1.01–1.43 g cm⁻³ (average 1.24 g cm⁻³), respectively. Using the estimated values of hydraulic conductivity, porosity, and the average value of hydraulic gradient between various wells at the site, the average groundwater velocity has been estimated to be around 1.0 m day⁻¹ which matches fairly well with the groundwater velocity estimated using radioactive tracer techniques. These site-specific results will be useful in the radiological impact assessment of a proposed near surface waste disposal facility at Nuclear Fuel Complex, Hyderabad, India.