Download or read book Fabrication of ThO2 and ThO2 UO2 Fuel Pellets written by and published by . This book was released on 1980 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: In this presentation, ThO2 and ThO2-UO2 pellet fuel development activities leading to the production of kilogram quantities of fuel are described. Conventional dry ball milling was used to produce ThO2 and ThO2-UO2 mixtures that were pressed and sintered to 95% TD with a homogeneous distribution of the components.
Download or read book Fabrication of ThO2 and ThO2 UO2 Pellets for Proliferation Resistant Fuels written by R. B. Matthews and published by . This book was released on 1979 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Manufacture of the ThO2 UO2 Ceramic Fuel Pellets for BORAX IV written by J. H. Handwerk and published by . This book was released on 1957 with total page 26 pages. Available in PDF, EPUB and Kindle. Book excerpt: The pellets were loaded into Al1 wt.% Ni tube plates and the annulus between the pellet and the tube was filled with lead. After closing the open end of the tube plates, the plates were spot welded into a subassembly.
Download or read book Chemical Reactions During ThO2 and ThO2 UO2 Fuel Fabrication written by and published by . This book was released on 1994 with total page 11 pages. Available in PDF, EPUB and Kindle. Book excerpt: The chemical reactions that occur during the fabrication of fuel pellets for the Shipping port Light Water Breeder Reactor are discussed. These include (1) precipitation and pyrolysis of thorium oxalate, (2) precipitation, calcination, and hydrogen reduction of ammonium diuranate, (3) comminution, granulation with an organic binder, and cold compaction of ThO2 and ThO2-UO2 powders, (4) decarburization of the organic binder in CO2 at temperature up to 925 C, and (5) sintering in moist hydrogen at temperature up to 1790 C. Thorium oxalate precipitation and pyrolysis temperatures were the primary process variables for controlling the resulting thoria powder properties. Coprecipitated metal sulfates were converted to transition metal sulfides during calcining - the conversion of thorium oxalate to thorium oxide. The critical variable for controlling the urania powder properties was the hydrogen reduction temperature. Thermodynamic analyses showed that the efficiency of carbon removal from cold-compacted ThO2 and ThO2-UO2 pellets by CO2 oxidation increases with temperature and, at temperatures around 900 C, substantially complete oxidation of carbon to carbon monoxide gas should occur. The carbon content of the ThO2 and ThO2-UO2 fuels was further reduced during the initial heating in the hydrogen sintering cycle through the formation of methane gas. Additions of water vapor to the hydrogen sintering atmosphere also aided in carbon removal.
Download or read book Fabrication of ThO2 and ThO2 UO2 Pellets for Proliferation Resistant Fuels written by and published by . This book was released on 1979 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: To meet this objective, batches of ThO2 powders were compared and milling parameters, pressing and sintering conditions were established. A method for blending ThO2 and UO2 into homogeneous powders that press and sinter into 95% TD pellets was determined. The effect of UO2 additions on ThO2-UO2 pellet properties was determined and a process for fabricating irradiation test quality ThO2-20 wt% UO2 pellets containing CaO as a dissolution aid was established.
Download or read book Fabrication of ThO2 UO2 and PuO2 UO2 Pellets LMFBR written by and published by . This book was released on 1978 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Fabrication of ThO pellets for EBR-II irradiation testing and fabrication of UO2 and PuO2-UO2 pellets for United Kingdom Prototype Fast Reactor (PFR) irradiation testing is discussed. Effect of process parameters on density and microstructure of pellets fabricated by the cold press and sinter technique is reviewed.
Download or read book Tho2 uo2 pellet fabrication tests for the u 111 irradiation written by R. J. Stack and published by . This book was released on 1969 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Preparation and Fabrication of ThO2 Fuels written by D. E. Ferguson and published by . This book was released on 1962 with total page 34 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Nuclear Science Abstracts written by and published by . This book was released on 1971 with total page 1310 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Thoria fuel Irradiation Program to Irradiate 80 ThO2 20 UO2 Ceramic Pellets at the Savannah River Plant written by and published by . This book was released on 1982 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This report describes the fabrication of proliferation-resistant thorium oxide/uranium oxide ceramic fuel pellets and preparations at the Savannah River Laboratory (SRL) to irradiate those materials. The materials were fabricated in order to study head end process steps (decladding, tritium removal, and dissolution) which would be required for an irradiated proliferation-resistant thorium based fuel. The thorium based materials were also to be studied to determine their ability to withstand average commercial light water reactor (LWR) irradiation conditions. This program was a portion of the Thorium Fuel Cycle Technology (TFCT) Program, and was coordinated by the Oak Ridge National Laboratory (ORNL) under the Consolidated Fuel Reprocessing Program (CFRP). The fuel materials were to be irradiated in a Savannah River Plant (SRP) reactor at conditions simulating the heat ratings and burnup of a commercial LWR. The program was terminated due to a de-emphasis of the TFCT Program, following completion of the fabrication of the fuel and the modified assemblies which were to be used in the SRP reactor. The reactor grade ceramic pellets were fabricated for SRL by Battelle, Pacific Northwest Laboratories. Five fuel types were prepared: 100% UO2 pellets (control); 80% ThO2/20% UO2 pellets; approximately 80% ThO2/20% UO2 + 0.25 CaO (dissolution aid) pellets; 100% UO2 hybrid pellets (prepared from sol-gel microspheres); and 100% ThO2 pellets (control). All of the fuel materials were transferred to SRL from PNL and were stored pending a subsequent reactivation of the TFCT Programs.
Download or read book Experience in the Fabrication of Uranium 233 Bearting ThO2 UO2 Rods in written by and published by . This book was released on 1964 with total page 26 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book ThO2 based Pellet Fuels Their Properties Methods of Fabrication and Irradiation Performance written by and published by . This book was released on 1979 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This critical assessment of the ThO2-UO2 pellet fuel technology was conducted in support of the Fuels Refabrication and Development Program (FRAD). Included in this critical review are the following areas: powder preparation; pellet fabrication; fuel chemical, physical, and mechanical properties; and fuel irradiation performance. The authors identify (1) areas where data are either deficient or lacking and (2) requirements for additional development and experimental work.
Download or read book Thoria based Nuclear Fuels written by Dasarathi Das and published by Springer Science & Business Media. This book was released on 2013-12-24 with total page 423 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents the state of the art on thermophysical and thermochemical properties, fabrication methodologies, irradiation behaviours, fuel reprocessing procedures, and aspects of waste management for oxide fuels in general and for thoria-based fuels in particular. The book covers all the essential features involved in the development of and working with nuclear technology. With the help of key databases, many of which were created by the authors, information is presented in the form of tables, figures, schematic diagrams and flow sheets, and photographs. This information will be useful for scientists and engineers working in the nuclear field, particularly for design and simulation, and for establishing the technology. One special feature is the inclusion of the latest information on thoria-based fuels, especially on the use of thorium in power generation, as it has less proliferation potential for nuclear weapons. Given its natural abundance, thorium offers a future alternative to uranium fuels in nuclear technology. In closing, the latest information on conventional uranium and plutonium fuels is also provided.
Download or read book Characterisation and Quality Control of Nuclear Fuels written by and published by Allied Publishers. This book was released on 2004 with total page 738 pages. Available in PDF, EPUB and Kindle. Book excerpt: Papers presented at the International Conference on Characterisation and Quality Control of Nuclear Fuels, held at Hyderabad in 2002.
Download or read book Hybrid Pellets written by and published by . This book was released on 1979 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The feasibility of fabricating fuel pellets using gel-derived microspheres as press feed was evaluated. By using gel-derived microspheres as press feed, the potential exists for eliminating dusty operations like milling, slugging, and granulation, from the pelleting process. The free-flowing character of the spheres should also result in limited dust generation during powder transport and pressing operations. The results of this study clearly demonstrate that fuel pellets can be successfully fabricated on a laboratory scale using UO2 gel microspheres as press feed. Under moderate sintering conditions, 1,500°C for 4 h in Ar-4% H2, UO2 pellets with densities up to 96% TD were fabricated. A range of pellet microstructures and densities were achieved depending on sphere forming and calcining conditions. Based on these results, a set of necessary sphere properties are suggested: O/U less than 2.20, crystallite size less than 500 A, specific surface area greater than 8 m2/g, and sphere size 200 and 400 .mu.m. Preliminary attempts to fabricate ThO2 and ThO2-UO2 pellets using microspheres were unsuccessful because the requisite sphere properties were not achieved. Areas requiring additional development include: demonstration of the process on scaled-up equipment suitable for use in a remote fuel fabrication facility and evaluation of the irradiation performance of pellet fuels from gel-spheres.
Download or read book Fabrication of High Density ThO2 Fuel Pellets from Freeze dried Granular Feed written by T. J. Burke and published by . This book was released on 1982 with total page 16 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 1982 with total page 1696 pages. Available in PDF, EPUB and Kindle. Book excerpt:
