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Testing And Calibration Of A Source Term Leaching Computer Model For Low Level Nuclear Waste Burial
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Book Synopsis Testing and Calibration of a Source Term Leaching Computer Model for Low-level Nuclear Waste Burial by : Sumangali Hoode
Download or read book Testing and Calibration of a Source Term Leaching Computer Model for Low-level Nuclear Waste Burial written by Sumangali Hoode and published by . This book was released on 1992 with total page 152 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Low-level Waste Shallow Land Burial Source Term Waste Form Leaching Model Development for the BLT Computer Code by :
Download or read book Low-level Waste Shallow Land Burial Source Term Waste Form Leaching Model Development for the BLT Computer Code written by and published by . This book was released on 1991 with total page 15 pages. Available in PDF, EPUB and Kindle. Book excerpt: A numerical model for leaching from solidified waste forms into a partially saturated porous medium has been developed. This model treats the waste form using the method of finite differences and the solution in the porous medium as a well stirred fluid (i.e., a uniform concentration mixing bath). The model simultaneously considers three release mechanisms: surface rinse, diffusion release, and dissolution release. The model has been verified through comparison to analytical solutions and used to successfully reproduce experimentally measured releases in wet/dry cycle leach tests. The model has been incorporated into the BLT computer code and is an improvement over previous models in the code because it treats all three release mechanisms simultaneously, allows solution concentration buildup in the mixing bath to influence diffusive releases, and allows partitioning of the contaminant between the waste form and the contacting solution. 13 refs., 2 figs., 4 tabs.
Book Synopsis Low-level Waste Shallow Land Burial Source Term Waste Form Leaching Model Development for the BLT Computer Code by :
Download or read book Low-level Waste Shallow Land Burial Source Term Waste Form Leaching Model Development for the BLT Computer Code written by and published by . This book was released on 1991 with total page 15 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Masters Abstracts International by :
Download or read book Masters Abstracts International written by and published by . This book was released on 1994 with total page 832 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Masters Theses in the Pure and Applied Sciences by : Wade H. Shafer
Download or read book Masters Theses in the Pure and Applied Sciences written by Wade H. Shafer and published by Springer. This book was released on 1996-04-30 with total page 442 pages. Available in PDF, EPUB and Kindle. Book excerpt: Masters Theses in the Pure and Applied Sciences was first conceived, published, and disseminated by the Center for Information and Numerical Data Analysis and Synthesis (CINDAS)* at Purdue University in 1957, starting its coverage of theses with the academic year 1955. Beginning with Volume 13, the printing and dis semination phases of the activity were transferred to University Microfilms/Xerox of Ann Arbor, Michigan, with the thought that such an arrangement would be more beneficial to the academic and general scientific and technical community. After five years of this joint undertaking we had concluded that it was in the interest of all concerned if the printing and distribution of the volumes were handled by an international publishing house to assure improved service and broader dissemination. Hence, starting with Volume 18, Masters Theses in the Pure and Applied Sciences has been disseminated on a worldwide basis by Plenum Publishing Corporation of New York, and in the same year the coverage was broadened to include Canadian universities. All back issues can also be ordered from Plenum. We have reported in Volume 39 (thesis year 1994) a total of 13,953 thesis titles from 21 Canadian and 159 United States universities. We are sure that this broader base for these titles reported will greatly enhance the value of this impor tant annual reference work. While Volume 39 reports theses submitted in 1994, on occasion, certain uni versities do report theses submitted in previous years but not reported at the time.
Book Synopsis Development of an Accelerated Leach Test(s) for Low-level Waste Forms by :
Download or read book Development of an Accelerated Leach Test(s) for Low-level Waste Forms written by and published by . This book was released on 1985 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: An accelerated leach test(s) is being developed to predict long-term leaching behavior of low-level radioactive waste (LLW) forms in their disposal environments. As necessary background, a literature survey of reported leaching mechanisms, available mathematical models and factors that affect leaching of LLW forms has been compiled. Mechanisms which have been identified include diffusion, dissolution, ion exchange, corrosion and surface effects. A computerized data base of LLW leaching data and mathematical models is being developed. The data is being used for model evaluation by curve fitting and statistical analysis according to standard procedures of statistical quality control. Long-term leach tests on portland cement, bitumen and vinyl ester-styrene (VES) polymer waste forms are underway which are designed to identify and evaluate factors that accelerate leaching without changing the mechanisms. Initial results on the effect of temperature on leachability indicate that the leach rates of cement and VES waste forms increase with increasing temperature, whereas, the leach rate of bitumen is little affected. 10 refs., 5 figs.
Book Synopsis Low-level Waste Shallow Land Burial Source Term Container Breach and Waste Form Leaching Model Development by :
Download or read book Low-level Waste Shallow Land Burial Source Term Container Breach and Waste Form Leaching Model Development written by and published by . This book was released on 1990 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Suitability of Equilibrium Leach Tests for Defining the Source Term in Sub-seabed Disposal of Intermediate Level Radioactive Waste by : D. Read
Download or read book The Suitability of Equilibrium Leach Tests for Defining the Source Term in Sub-seabed Disposal of Intermediate Level Radioactive Waste written by D. Read and published by . This book was released on 1987 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Master's Theses Directories written by and published by . This book was released on 1993 with total page 496 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Education, arts and social sciences, natural and technical sciences in the United States and Canada".
Download or read book Energy Research Abstracts written by and published by . This book was released on 1995 with total page 782 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Radioactive Waste Management written by and published by . This book was released on 1990 with total page 400 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Users' Guide for the Accelerated Leach Test Computer Program by :
Download or read book Users' Guide for the Accelerated Leach Test Computer Program written by and published by . This book was released on 1990 with total page 165 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report is a step-by-step guide for the Accelerated Leach Test (ALT) Computer Program developed to accompany a new leach test for solidified waste forms. The program is designed to be used as a tool for performing the calculations necessary to analyze leach test data, a modeling program to determine if diffusion is the operating leaching mechanism (and, if not, to indicate other possible mechanisms), and a means to make extrapolations using the diffusion models. The ALT program contains four mathematical models that can be used to represent the data. The leaching mechanisms described by these models are: (1) diffusion through a semi-infinite medium (for low fractional releases), (2) diffusion through a finite cylinder (for high fractional releases), (3) diffusion plus partitioning of the source term, (4) solubility limited leaching. Results are presented as a graph containing the experimental data and the best-fit model curve. Results can also be output as LOTUS 1-2-3 files. 2 refs.
Book Synopsis Development of a Computerized Data Base for Low-level Radioactive Waste Leaching Data by :
Download or read book Development of a Computerized Data Base for Low-level Radioactive Waste Leaching Data written by and published by . This book was released on 1986 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This report documents the development of a computerized data base (db) of leaching data for solidified low-level radioactive waste (LLW) forms. Brookhaven National Lab performed this work under contract with the US Department of Energy's Low-Level Waste Management Program as part of an effort to develop an accelerated leach test(s) that can be used to predict leachabilities of LLW forms over long time periods, i.e., hundreds of years. The accelerated leach test(s) is (are) to be developed based on knowledge of leaching mechanisms and factors that affect leaching. Although developed specifically for the Accelerated Leach Test(s) Program, this db may be useful to others concerned with the management of low-level waste. The db is being developed to provide efficient data compilation and analysis capabilities. The data compiled in the db, which include data from the Accelerated Leach Test(s) Program and selected data from the literature, have been selected to elucidate leaching mechanisms and factors that affect leaching and are not meant to be a comprehensive compilation of leaching data. This report presents the data compilation aspect of the db. It does not present the programmatic results obtained from analysis of the data regarding leaching mechanisms and factors that affect leaching, which will be presented in reports from the Accelerated Leach Test(s) Program. 6 refs.
Book Synopsis Progress in Development of an Accelerated Leach Test for Low-level Radioactive Waste Forms by :
Download or read book Progress in Development of an Accelerated Leach Test for Low-level Radioactive Waste Forms written by and published by . This book was released on 1987 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Factors that accelerate leaching from solidified low-level radioactive waste are being investigated to develop a short-term leach test that can be used to predict long-term releases. Data from work with portland cement containing radioactive tracers indicate that elevated temperatures can accelerate leaching of Ce-137 by at least a factor of eleven without changing the leaching mechanism. An 18 day leach test at 50°C provided the equivalent of 200 days data taken at 20°C. Portland cement containing 5 wt % Na2SO4 also can be accelerated, but to a lesser degree. Solid phase analysis indicated that pore plugging and increased tortuosity may be the cause of the smaller acceleration. Reduced specimen size was also a useful acceleration factor with inhomogeneities not being a problem in very small specimens. Elevated pH and 100 ppM EDTA in leaching solutions increased Sr-85 releases without altering Cs-137 leaching. 9 refs., 10 figs., 1 tab.
Book Synopsis Users' Guide for the Accelerated Leach Test Computer Program by :
Download or read book Users' Guide for the Accelerated Leach Test Computer Program written by and published by . This book was released on 1990 with total page 165 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis A Mechanistic Model for Leaching from Low-level Radioactive Waste Packages by :
Download or read book A Mechanistic Model for Leaching from Low-level Radioactive Waste Packages written by and published by . This book was released on 1988 with total page 17 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Accelerated Leach Test Development Program by :
Download or read book Accelerated Leach Test Development Program written by and published by . This book was released on 1990 with total page 65 pages. Available in PDF, EPUB and Kindle. Book excerpt: In FY 1989, a draft accelerated leach test for solidified waste was written. Combined test conditions that accelerate leaching were validated through experimental and modeling efforts. A computer program was developed that calculates test results and models leaching mechanisms. This program allows the user to determine if diffusion controls leaching and, if this is the case, to make projections of releases. Leaching mechanisms other than diffusion (diffusion plus source term partitioning and solubility limited leaching) are included in the program is indicators of other processes that may control leaching. Leach test data are presented and modeling results are discussed for laboratory scale waste forms composed of portland cement containing sodium sulfate salt, portland cement containing incinerator ash, and vinyl ester-styrene containing sodium sulfate. 16 refs., 38 figs., 5 tabs.
