Download or read book Hydrology and Geochemistry of the Uranium Mill Tailings Pile at Riverton Wyoming written by Thiruppudaimarudhur N. Narasimhan and published by . This book was released on 1984 with total page 260 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Hydrology and Geochemistry of the Uranium Mill Tailings Pile at Riverton Wyoming Part II History Matching Mathematical Simulation of the Observed Fluid Potentials Within the Tailings and the Observed Distribution of Various Chemical Species Within and Around the Mill Tailings written by and published by . This book was released on 1985 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: In Part I of this series of two reports the observed fluid potential and geochemical characteristics in and around the inactive uranium mill tailings pile at Riverton, Wyoming were presented. The prupose of the present work is to attempt to simulate field observations using mathematical models. The results of the studies have not only helped identify the physicochemical mechanisms govering contaminant migration around the inactive mill tailings pile in Riverton, but also have indicated the feasibility of quantifying these mechanisms with the help of newly developed mathematical models. Much work needs to be done to validate and benchmark these models. The history-matching effort on hand involves the mathematical simulation of the observed fluid potentials within the tailings, and the observed distribution of various chemical species within and around the inactive uranium mill tailings. The simulation problem involves consideration of transient fluid flow and transient, reactive chemical transport in a variably saturated ground water system with time-dependent boundary conditions. 15 refs., 30 figs., 3 tabs.

Download or read book Hydro geochemical Studies of Uranium Mill Tailing Piles at Riverton Wyoming and Maybell Colorado Annual Report for FY 1981 written by and published by . This book was released on 1982 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The present study is the beginning phase of an effort to develop an understanding of the physico-chemical interactions that occur within two typical inactive uranium mill tailing piles under the jurisdiction of the UMTRA Program. These sites are located at Riverton, Wyoming and at Maybell, Colorado. The understanding is to be gained through integrated hydrological-geochemical-radiometric studies. Investigated are: (a) the release of contaminants to the interstitial fluid; and (b) the vertical transport of the contaminants either upward to the surface or downward to the water table. This investigation would determine the important contaminants, ascertain the influence of chemical/osmotic potentials (if any) on fluid movement, and investigate the possibility of temporal cycles in the upward/downward movement of fluids with seasonal changes in the moisture content of the piles. The field work carried out during fiscal 1981 extended from June to September. During this period, exploratory drilling was completed at six locations on the Riverton and Maybell piles. Over 141 Shelby tube samples were collected, which represent relatively undisturbed core samples of the tailings material. In order to gain a maximum advantage of the short time available before the onset of the winter, it was decided to concentrate the rest of the data collection at the Riverton site, where the water table is shallow.

Download or read book Hydro geochemical studies of Uranium Mill Tailing Piles at Riverton Wyoming and Maybell Colorado written by Thiruppudaimarudhur N. Narasimhan and published by . This book was released on 1982 with total page 107 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Remedial Action at the Riverton Uranium Mill Tailings Site Riverton Wyoming written by United States. Department of Energy and published by . This book was released on 1987 with total page 638 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Findings of No Significant Impact Remedial Action at the Riverton Uranium Mill Tailings Site Riverton Wyoming written by United States. Department of Energy and published by . This book was released on 1987 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Environmental Assessment of Remedial Action at the Riverton Uranium Mill Tailings Site Riverton Wyoming written by and published by . This book was released on 1987 with total page 30 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Energy Research Abstracts written by and published by . This book was released on 1985 with total page 780 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Energy Research Abstracts written by and published by . This book was released on 1985 with total page 1652 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Reconnaissance soil geochemistry at the Riverton Uranium Mill Tailings Remedial Action Site Fremont County Wyoming written by and published by . This book was released on 2012 with total page 23 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book ERDA Energy Research Abstracts written by and published by . This book was released on 1985 with total page 676 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Recent Hydrological Observations from the Riverton and the Maybell Tailings Piles written by and published by . This book was released on 1982 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Field and laboratory hydrologic studies of two inactive uranium mill tailings piles are presented. The Riverton, Wyoming site is in close proximity to the water table, while the Maybell, Colorado site represents the contrasting case of the local water table being far below the tailings pile. Field studies included monitoring of hydraulic head profiles of the piles with tensiometers and piezometers, and infiltration tests. Laboratory tests on core samples from the tailings and soil cover included saturated and unsaturated hydraulic conductivity measurements, saturation versus metric heat measurements, particle-size analysis, as well as determination of bulk densities and porosities. The tensiometer data indicate that the major portion of the tailings water at both piles exists under near steady-state unsaturated conditions with flow downward towards the water table. The zero-flux surface in these regions is within a meter of the upper surface of the tailings. A case of upward flow from the aquifer through the tailings was also observed in the thinnest, eastern portion of the Riverton tailings. Combined field data and laboratory results lead to an estimated steady-state downward flow of tailings water in a typical region of the Riverton tailings in the range of 10−1° m.s−1 to 10−9 m.s−1. This is equivalent to about 3 x 10−3 m.yr−1 to 3 x 10−2 m.yr−1, a small fraction of the local mean annual precipitation (2.5 x 10−1 m.yr−1). This suggests that the bulk of the precipitation input at the Riverton tailings is lost by evaportranspiration within the upper meter of soil cover and tailings.

Download or read book Phase II Title I Engineering Assessment of Inactive Uranium Mill Tailings Riverton Site Riverton Wyoming written by and published by . This book was released on 1977 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: An engineering assessment was performed of the problems resulting from the existence of radioactive uranium mill tailings at the Spook Site, Converse County, Wyoming. Services include the performance of core drillings, soil, water and other sample analyses, radiometric measurements to determine areas with radium-contaminated materials, the evaluation of resulting radiation exposures of individuals and nearby populations, the investigation of site geology, hydrology, and meteorology and the evaluation and costing of alternative corrective actions. Radon gas release from the 187,000 tons of tailings at the Spook Site constitutes the main environmental impact, which is negligible. The two alternative actions presented are better fencing of the site in its present state, and placing tailings and contaminated on-site materials and soil in the open-pit mine and covering the resulting pile with 2 ft of overburden materials. The cost estimates for the options are $81,000 and $142,000, respectively.

Download or read book Environmental Assessment of Ground Water Compliance at the Riverton Wyoming Uranium Mill Tailings Site written by United States. Department of Energy and published by . This book was released on 1998 with total page 35 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Uranium Mill Tailings Remedial Action Project written by United States. Department of Energy and published by . This book was released on 1993 with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Summary of the Phase II Title I Engineering Assessment of Inactive Uranium Mill Tailing Riverton Site Riverton Wyoming written by and published by . This book was released on 1977 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: An engineering assessment was performed of the problems resulting from the existence of radioactive uranium mill tailings at the Riverton, Wyoming site. The soil, water and other sample analyses; radiometric measurements to determine areas with radium-contaminated materials; the evaluation of resulting radiation exposures of individuals and nearby populations; the investigation of site geology, hydrology, and meteorology; and the evaluation and costing of alternative corrective actions. Radon gas release from the 900,000 tons of tailings at the Riverton site constitutes the main environmental impact. The two alternative actions presented are fencing and maintenance of the site and off-site remedial action, and decontamination of the millsite and ore storage areas and additional stabilization cover to a minimum of 2 ft. The cost estimates for the options are $460,000 and $1,140,000, respectively. Estimated costs for moving the tailings and all contaminated materials to unspecified sites 5 and 10 mi from the present location are $6,000,000 and $6,400,000, respectively.

Download or read book Radiological Survey of the Inactive Uranium mill Tailings at Riverton Wyoming written by and published by . This book was released on 1980 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Results of a radiological survey performed at the Riverton, Wyoming site in July 1976, are presented. The average external gamma exposure rate at 1 m over the tailings pile was 56 .mu. R/hr. The corresponding rate for the former mill area was 97 .mu. R/hr. Movement of tailings particles in a dry wash is evident; but it appears that, in general, the earth cover over the tailings pile has been effective in limiting both wind and water erosion of the tailings. The calculated concentration of 226Ra as a function of depth in 15 augered holes is presented graphically. A survey of the Teton Division Lumber Company property in Riverton showed a maximum external gamma exposure rate of 270 .mu. R/hr.