Leaching Of Actinide Doped Nuclear Waste Glass In A Tuff Dominated System

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Leaching of Actinide-doped Nuclear Waste Glass in a Tuff-dominated System

Author :
Publisher :
ISBN 13 :
Total Pages : 14 pages
Book Rating : 4.:/5 (727 download)

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Book Synopsis Leaching of Actinide-doped Nuclear Waste Glass in a Tuff-dominated System by :

Download or read book Leaching of Actinide-doped Nuclear Waste Glass in a Tuff-dominated System written by and published by . This book was released on 1987 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt: A laboratory leaching test has been performed as part of a project to evaluate the suitability of tuff rocks at Yucca Mountain, Nevada, as a site for a high-level nuclear waste repository. Glass samples were placed in water inside tuff vessels, and then the tuff vessels were placed in water inside Teflon containers. Glass-component leach rates and migration through the tuff were measured for samples of the ATM-8 actinide glass, which is a PNL 76-68 based glass doped with low levels of 99Tc, 237Np, 238U, and 239Pu to simulate wastes. Disc samples of this glass were leached at 90°C for 30, 90, and 183 days inside tuff vessels using a natural groundwater (J-13 well-water) as the leachant. At the end of each leaching interval, the J-13 water present inside and outside the rock vessel was analyzed for glass components in solutions. Boron, molybdenum, and technetium appear to migrate through the rock at rates that depend on the porosity of each vessel and the time. The actinide elements were found only in the inner leachate. Normalized elemental mass loss values for boron, molybdenum, and technetium were calculated using concentrations of the inner and outer leachates and assuming a negligible retention on the rock. The maximum normalized release was 2.3 g/m2 for technetium. Boron, molybdenum, technetium, and neptunium were released linearly with respect to each other, with boron and molybdenum released at about 85% of the technetium rate, and neptunium at 5 to 10% of the technetium rate. Plutonium was found at low levels in the inner leachate but was strongly sorbed on the steel and Teflon supports. Neptunium was sorbed to a lesser extent. 8 refs., 6 figs., 6 tabs.

Energy Research Abstracts

Author :
Publisher :
ISBN 13 :
Total Pages : 716 pages
Book Rating : 4.3/5 (91 download)

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Download or read book Energy Research Abstracts written by and published by . This book was released on 1987 with total page 716 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Handbook of Advanced Radioactive Waste Conditioning Technologies

Author : Michael I. Ojovan
Publisher : Elsevier
ISBN 13 : 085709095X
Total Pages : 505 pages
Book Rating : 4.8/5 (57 download)

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Book Synopsis Handbook of Advanced Radioactive Waste Conditioning Technologies by : Michael I. Ojovan

Download or read book Handbook of Advanced Radioactive Waste Conditioning Technologies written by Michael I. Ojovan and published by Elsevier. This book was released on 2011-01-24 with total page 505 pages. Available in PDF, EPUB and Kindle. Book excerpt: Radioactive wastes are generated from a wide range of sources, including the power industry, and medical and scientific research institutions, presenting a range of challenges in dealing with a diverse set of radionuclides of varying concentrations. Conditioning technologies are essential for the encapsulation and immobilisation of these radioactive wastes, forming the initial engineered barrier required for their transportation, storage and disposal. The need to ensure the long term performance of radioactive waste forms is a key driver of the development of advanced conditioning technologies.The Handbook of advanced radioactive waste conditioning technologies provides a comprehensive and systematic reference on the various options available and under development for the treatment and immobilisation of radioactive wastes. The book opens with an introductory chapter on radioactive waste characterisation and selection of conditioning technologies. Part one reviews the main radioactive waste treatment processes and conditioning technologies, including volume reduction techniques such as compaction, incineration and plasma treatment, as well as encapsulation methods such as cementation, calcination and vitrification. This coverage is extended in part two, with in-depth reviews of the development of advanced materials for radioactive waste conditioning, including geopolymers, glass and ceramic matrices for nuclear waste immobilisation, and waste packages and containers for disposal. Finally, part three reviews the long-term performance assessment and knowledge management techniques applicable to both spent nuclear fuels and solid radioactive waste forms.With its distinguished international team of contributors, the Handbook of advanced radioactive waste conditioning technologies is a standard reference for all radioactive waste management professionals, radiochemists, academics and researchers involved in the development of the nuclear fuel cycle. - Provides a comprehensive and systematic reference on the various options available and under development for the treatment and immobilisation of radioactive wastes - Explores radioactive waste characterisation and selection of conditioning technologies including the development of advanced materials for radioactive waste conditioning - Assesses the main radioactive waste treatment processes and conditioning technologies, including volume reduction techniques such as compaction

Waste Forms Technology and Performance

Author : National Research Council
Publisher : National Academies Press
ISBN 13 : 0309187338
Total Pages : 308 pages
Book Rating : 4.3/5 (91 download)

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Book Synopsis Waste Forms Technology and Performance by : National Research Council

Download or read book Waste Forms Technology and Performance written by National Research Council and published by National Academies Press. This book was released on 2011-09-05 with total page 308 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Department of Energy's Office of Environmental Management (DOE-EM) is responsible for cleaning up radioactive waste and environmental contamination resulting from five decades of nuclear weapons production and testing. A major focus of this program involves the retrieval, processing, and immobilization of waste into stable, solid waste forms for disposal. Waste Forms Technology and Performance, a report requested by DOE-EM, examines requirements for waste form technology and performance in the cleanup program. The report provides information to DOE-EM to support improvements in methods for processing waste and selecting and fabricating waste forms. Waste Forms Technology and Performance places particular emphasis on processing technologies for high-level radioactive waste, DOE's most expensive and arguably most difficult cleanup challenge. The report's key messages are presented in ten findings and one recommendation.

Radioactive Waste Management

Author :
Publisher :
ISBN 13 :
Total Pages : 622 pages
Book Rating : 4.X/5 (1 download)

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Download or read book Radioactive Waste Management written by and published by . This book was released on 1981 with total page 622 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Environmental Issues and Waste Management Technologies in the Ceramic and Nuclear Industries IX

Author : John D. Vienna
Publisher : John Wiley & Sons
ISBN 13 : 1118407024
Total Pages : 384 pages
Book Rating : 4.1/5 (184 download)

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Book Synopsis Environmental Issues and Waste Management Technologies in the Ceramic and Nuclear Industries IX by : John D. Vienna

Download or read book Environmental Issues and Waste Management Technologies in the Ceramic and Nuclear Industries IX written by John D. Vienna and published by John Wiley & Sons. This book was released on 2012-04-05 with total page 384 pages. Available in PDF, EPUB and Kindle. Book excerpt: In today's world of increasingly stringent environmental regulations, it is critical to identify and adequately address environmental issues in the ceramic industry to ensure success. In addition, ceramics and glasses play a critical role in the nuclear industry. Nuclear fuels and waste forms for low-level and high-level radioactive, mixed, and hazardous wastes are primarily either ceramic of glass. Effective and responsible environmental stewardship is becoming increasingly more important in the world. These proceedings detail the results of the ongoing effort in these areas. Proceedings of the symposium held at the 105th Annual Meeting of The American Ceramic Society, April 27-30, in Nashville, Tennessee; Ceramic Transactions, Volume 155.

Environmental Issues and Waste Management Technologies in the Ceramic and Nuclear Industries XI

Author : Connie C. Herman
Publisher : John Wiley & Sons
ISBN 13 : 1118407962
Total Pages : 247 pages
Book Rating : 4.1/5 (184 download)

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Book Synopsis Environmental Issues and Waste Management Technologies in the Ceramic and Nuclear Industries XI by : Connie C. Herman

Download or read book Environmental Issues and Waste Management Technologies in the Ceramic and Nuclear Industries XI written by Connie C. Herman and published by John Wiley & Sons. This book was released on 2012-04-11 with total page 247 pages. Available in PDF, EPUB and Kindle. Book excerpt: This proceedings contains papers presented at the Ceramic/Glass Science and Technology for Nuclear and Environmental Industries symposium. Topics include nuclear and environmental technology applications in the ceramic industry; nuclear waste forms and fuels processing and technology - ceramic forms; nuclear waste forms processing and technology - steam reforming; panel discussion on nuclear waste forms durability, testing, and disposal status; nuclear waste forms and fuels processing and technology - glass forms; and advances in nuclear waste form testing and characterization methods.

Environmental Issues and Waste Management Technologies in the Materials and Nuclear Industries XII

Author : Alex Cozzi
Publisher : John Wiley & Sons
ISBN 13 : 0470538368
Total Pages : 322 pages
Book Rating : 4.4/5 (75 download)

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Book Synopsis Environmental Issues and Waste Management Technologies in the Materials and Nuclear Industries XII by : Alex Cozzi

Download or read book Environmental Issues and Waste Management Technologies in the Materials and Nuclear Industries XII written by Alex Cozzi and published by John Wiley & Sons. This book was released on 2009-09-24 with total page 322 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book documents a special collection of articles from a select group of invited prominent scientists from academia, national laboratories and industry who presented their work at the symposia on Environmental and Energy Issues at the 2008 Materials Science and Technology (MS&T’08) conference held in Pittsburgh, PA. These articles represent a summary of the presentations focusing on topics in nuclear, environmental, and green engineering were held, including a discussion of Waste Glass Leach Testing and Modeling.

Scientific Basis for Nuclear Waste Management

Author :
Publisher :
ISBN 13 :
Total Pages : 856 pages
Book Rating : 4.X/5 (1 download)

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Book Synopsis Scientific Basis for Nuclear Waste Management by :

Download or read book Scientific Basis for Nuclear Waste Management written by and published by . This book was released on 1986 with total page 856 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Leaching Savannah River Plant Nuclear Waste Glass in a Saturated Tuff Environment

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Publisher :
ISBN 13 :
Total Pages : 19 pages
Book Rating : 4.:/5 (727 download)

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Download or read book Leaching Savannah River Plant Nuclear Waste Glass in a Saturated Tuff Environment written by and published by . This book was released on 1984 with total page 19 pages. Available in PDF, EPUB and Kindle. Book excerpt: Samples of SRP glass containing either simulated or actual radioactive waste were leached at 90°C under conditions simulating a saturated tuff repository environment. The leach vessels were fabricated of tuff and actual tuff groundwater was used. Thus, the glass was leached only in the presence of those materials (including the Type 304L stainless steel canister material) that would be in the actual repository. Tests were performed for time periods up t 6 months at a SA/V ratio of 100 m−1. Results with glass containing simulated waste indicated that stainless steel canister material around the glass did not significantly affect the leaching. Based on Li and B (elements not in significant concentrations in the tuff or tuff groundwater), glass containing simulated waste leached identically to glass containing actual radioactive waste. The tuff buffered the pH so that only a slight increase was observed as a result of leaching. Results with glass containing actual radioactive waste indicated that tuff reduced the concentrations of Cs-137, Sr-90, and Pu-238 in the free groundwater in the simulated repository by 10 to 100X. Also, radiolysis of the groundwater by the glass (approximately 1000 rad/h) did not significantly affect the pH in the presence of tuff. Measured normalized mass losses in the presence of tuff for the glass based on Cs-137, Sr-90, and Pu-238 in the free groundwater were extremely low, nominally 0.02, 0.02, and 0.005 g/m2, respectively, indicating that the glass-tuff system retained radionuclides well. 9 references, 2 figures, 3 tables.

Leaching Savannah River Plant Nuclear Waste Glass in a Saturated Tuff Environment

Author : Ned Eugene Bibler
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (11 download)

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Book Synopsis Leaching Savannah River Plant Nuclear Waste Glass in a Saturated Tuff Environment by : Ned Eugene Bibler

Download or read book Leaching Savannah River Plant Nuclear Waste Glass in a Saturated Tuff Environment written by Ned Eugene Bibler and published by . This book was released on 1984 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Samples of SRP glass containing either simulated or actual radioactive waste were leached at 90°C under conditions simulating a saturated tuff repository environment. The leach vessels were fabricated of tuff and actual tuff groundwater was used. Thus, the glass was leached only in the presence of those materials (including the Type 304L stainless steel canister material) that would be in the actual repository. Tests were performed for time periods up t 6 months at a SA/V ratio of 100 m−1. Results with glass containing simulated waste indicated that stainless steel canister material around the glass did not significantly affect the leaching. Based on Li and B (elements not in significant concentrations in the tuff or tuff groundwater), glass containing simulated waste leached identically to glass containing actual radioactive waste. The tuff buffered the pH so that only a slight increase was observed as a result of leaching. Results with glass containing actual radioactive waste indicated that tuff reduced the concentrations of Cs-137, Sr-90, and Pu-238 in the free groundwater in the simulated repository by 10 to 100X. Also, radiolysis of the groundwater by the glass (approximately 1000 rad/h) did not significantly affect the pH in the presence of tuff. Measured normalized mass losses in the presence of tuff for the glass based on Cs-137, Sr-90, and Pu-238 in the free groundwater were extremely low, nominally 0.02, 0.02, and 0.005 g/m2, respectively, indicating that the glass-tuff system retained radionuclides well.

Glass as a Waste Form and Vitrification Technology

Author : National Research Council
Publisher : National Academies Press
ISBN 13 : 0309056829
Total Pages : 172 pages
Book Rating : 4.3/5 (9 download)

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Book Synopsis Glass as a Waste Form and Vitrification Technology by : National Research Council

Download or read book Glass as a Waste Form and Vitrification Technology written by National Research Council and published by National Academies Press. This book was released on 1997-03-02 with total page 172 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Static Leaching of Actinides and Fission Products from Fully Radioactive Waste Glass of HLLW Generated in Tokai Reprocessing Plant

Author : Kaname Miyahara
Publisher :
ISBN 13 :
Total Pages : 12 pages
Book Rating : 4.:/5 (74 download)

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Book Synopsis Static Leaching of Actinides and Fission Products from Fully Radioactive Waste Glass of HLLW Generated in Tokai Reprocessing Plant by : Kaname Miyahara

Download or read book Static Leaching of Actinides and Fission Products from Fully Radioactive Waste Glass of HLLW Generated in Tokai Reprocessing Plant written by Kaname Miyahara and published by . This book was released on 1989 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Annual Book of ASTM Standards

Author : ASTM International
Publisher :
ISBN 13 :
Total Pages : 1196 pages
Book Rating : 4.:/5 (31 download)

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Book Synopsis Annual Book of ASTM Standards by : ASTM International

Download or read book Annual Book of ASTM Standards written by ASTM International and published by . This book was released on 2003 with total page 1196 pages. Available in PDF, EPUB and Kindle. Book excerpt:

High-temperature Leaching of an Actinide-bearing, Simulated High-level Waste Glass

Author :
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (873 download)

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Download or read book High-temperature Leaching of an Actinide-bearing, Simulated High-level Waste Glass written by and published by . This book was released on 1983 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The chemical durability of a simulated high-level waste glass when exposed to high-temperature geologic solutions was investigated. In this study, simulated high-level waste glass-beads (76 to 68 glass)l doped with technetium, uranium, neptunium, plutonium, curium and americium were leached in deionized water, Waste Isolation Pilot Plant salt brine B, and 0.03M sodium bicarbonate solution at 150 and 250°C for 2, 4, 8, 16, and 32 days. The resulting solutions were analyzed for several nonradioactive glass components and for the radioactive dopants. The glass exhibited incongruent leaching behavior, i.e., the normalized releases (g-glass/m2) based on the different elements spanned four orders of magnitude. Normalized releases based on boron, molybdenum, sodium, cesium, silicon, and technetium were the same within a factor of three. Most of the nonradioactive components of the glass were released more to the salt brine than to the other two solutions. However, silicon, boron, molybdenum, technetium, and the actinides had their lowest releases in the salt brine. Reaction-layer thickness on the glass surface and weight losses of the glass beads were also smallest in the brine solution. Actinide releases were highest in the sodium bicarbonate solution. Calcium, strontium and barium releases decreased with time and temperature; the releases of most other elements increased with time and temperature. Solubility appears to be limiting the release of most elements. The leachate pH is controlled by chemical species within the original leachant and by species released as the glass leached. Carbonate ion complexes with some elements including uranium, effectively increasing their release. The more soluble elements including sodium, boron, molybdenum and technetium provide an indication of the actual rate of reaction between the glass and water.

Government Reports Announcements & Index

Author :
Publisher :
ISBN 13 :
Total Pages : 888 pages
Book Rating : 4.3/5 (91 download)

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Download or read book Government Reports Announcements & Index written by and published by . This book was released on 1988 with total page 888 pages. Available in PDF, EPUB and Kindle. Book excerpt:

The Performance of Actinide-containing SRL 165 Type Glass in Unsaturated Conditions

Author :
Publisher :
ISBN 13 :
Total Pages : 12 pages
Book Rating : 4.:/5 (727 download)

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Book Synopsis The Performance of Actinide-containing SRL 165 Type Glass in Unsaturated Conditions by :

Download or read book The Performance of Actinide-containing SRL 165 Type Glass in Unsaturated Conditions written by and published by . This book was released on 1987 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt: As part of the effort by the Nevada Nuclear Waste Storage Investigations (NNWSI) Project to evaluate the volcanic tuff beds of Yucca Mountain, Nevada, as a repository for the permanent storage of high-level nuclear waste, the interaction of actinide-doped Savannah River Laboratory (SRL) 165 type glass with the unsaturated repository environment has been studied. The NNWSI Unsaturated Test method has been used, and the results from batch and continuous tests completed through 18 months demonstrate that several interactions are important for controlling both the reaction of the glass and the release of radionuclides. These interactions include (1) the reaction between the glass and moist air with interludes of liquid water contact, which results in the release of alkali metals from the glass; and (2) the reaction between standing water, glass, and presensitized 304 L type stainless steel which results in breakdown of the glass matrix and the release of radionuclides from the glass-metal assemblage. A comparison of the results of the Unsaturated Test with those of parametric experiments illustrates the importance of presensitized steel in enhancing the glass reaction, and demonstrates the applicability of the Unsaturated Test to those conditions anticipated to exist in the NNWSI repository horizon. 10 refs., 8 figs., 1 tab.