Download or read book Effect of Melter Residence Time and Temperature on Defense Waste Processing Facility Glass Durability written by and published by . This book was released on 1994 with total page 0 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 1981 with total page 726 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 1995 with total page 782 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Durability of Glasses from the Hg doped Integrated DWPF Melter System IDMS Campaign written by and published by . This book was released on 1992 with total page 46 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Integrated DWPF Melter System (IDMS) for the vitrification of high-level radioactive wastes is designed and constructed to be a 1/9th scale prototype of the full scale Defense Waste Processing Facility (DWPF) melter. The IDMS facility is the first engineering scale melter system capable of processing mercury, and flowsheet levels of halides and noble metals. In order to determine the effects of mercury on the feed preparation process, the off-gas chemistry, glass melting behavior, and glass durability, a three-run mercury (Hg) campaign was conducted. The glasses produced during the Hg campaign were composed of Batch 1 sludge, simulated precipitate hydrolysis aqueous product (PHA) from the Precipitate Hydrolysis Experimental Facility (PHEF), and Frit 202. The glasses were produced using the DWPF process/product models for glass durability, viscosity, and liquidus. The durability model indicated that the glasses would all be more durable than the glass qualified in the DWPF Environmental Assessment (EA). The glass quality was verified by performing the Product Consistency Test (PCT) which was designed for glass durability testing in the DWPF.
Download or read book Proceedings of the International Topical Meeting on Nuclear and Hazardous Waste Management Spectrum 94 written by and published by . This book was released on 1994 with total page 868 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Durability of Defense Waste Processing Facility Glasses Within the Purex Range of Compositions written by and published by . This book was released on 1995 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Control of Radioactive Waste glass Melters written by and published by . This book was released on 1990 with total page 38 pages. Available in PDF, EPUB and Kindle. Book excerpt: Slurries of simulated high level radioactive waste and glass formers have been isothermally reacted and analyzed to identify the sequence of the major chemical reactions in waste vitrification, their effect on glass production rate, and the development of leach resistance. Melting rates of waste batches have been increased by the addition of reducing agents (formic acid, sucrose) and nitrates. The rate increases are attributable in part to exothermic reactions which occur at critical stages in the vitrification process. Nitrates must be balanced by adequate reducing agents to avoid the formation of persistent foam, which would destabilize the melting process. The effect of foaming on waste glass production rates is analyzed, and melt rate limitations defined for waste-glass melters, based upon measurable thermophysical properties. Minimum melter residence times required to homogenize glass and assure glass quality are much smaller than those used in current practice. Thus, melter size can be reduced without adversely affecting glass quality. Physical chemistry and localized heat transfer of the waste-glass melting process are examined, to refine the available models for predicting and assuring glass production rate. It is concluded that the size of replacement melters and future waste processing facilities can be significantly decreased if minimum heat transfer requirements for effective melting are met by mechanical agitation. A new class of waste glass melters has been designed, and proof of concept tests completed on simulated High Level Radioactive Waste slurry. Melt rates have exceeded 155 kg m−2 h−1 with slurry feeds (32 lb ft−2 h−1), and 229 kg kg m−2 h−1 with dry feed (47 lb ft−2 h−1). This is about 8 times the melt rate possible in conventional waste- glass melters of the same size. 39 refs., 5 figs., 9 tabs.
Download or read book Production and Remediation of Low sludge Simulated Purex Waste Glasses 1 written by and published by . This book was released on 1993 with total page 17 pages. Available in PDF, EPUB and Kindle. Book excerpt: Glass produced during the Purex 4 campaigns of the Integrated Defense Waste Processing Facility (DWPF) Melter System (IDMS) and the 774 Research Melter contained a lower fraction of sludge components than targeted by the Product Composition Control System (PCCS). Purex 4 glass was more durable than the benchmark (EA) glass, but less durable than most simulated SRS high-level waste glasses. Also, Purex 4 glass was considerably less durable than predicted by the algorithm which will be used to control production of DWPF glass. A melter run was performed using the 774 Research Melter to determine if the initial PCCS target composition determined for Purex 4 would produce acceptable glass whose durability could be accurately modeled by Hydration Thermodynamics. Reagent grade oxides and carbonates were added to Purex 4 melter feed stock to simulate a higher sludge loading. Each canister of glass produced was sampled and the composition, crystallinity, and durability was determined. This document details the melter operation and composition and crystallinity analyses.
Download or read book Journaal eerste gedeelte written by and published by . This book was released on 1966 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Evaluation of Defense Waste Processing Facility DWPF Glass Samples After an Extended Melter Outage written by and published by . This book was released on 2014 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Effect of Adding Crystalline Silicotitanate on the Durability Liquidus and Viscosity of Simulated High level Waste Glasses at Savannah River Site written by and published by . This book was released on 2000 with total page 5 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report provides a summary of the results obtained for a limited variability study for glasses containing Crystalline Silicotitanate (CST), Monosodium Titanate (MST), and either simulated Purex or HM sludge. Twenty-two glasses containing Purex sludge and three glasses containing HM sludge were fabricated and tested. The fabricated glasses were tested for durability using the 7-day Product Consistency Test (PCT) and characterized by measuring the viscosity at 1,150 C and by determining an approximate, bounding liquidus temperature. The current models used by Defense Waste Processing Facility (DWPF) for predicting durability, viscosity, and liquidus temperature were applied to all 25 glasses. The goal of this work was to identify any major problems from a glass perspective, within the scope of this effort, which could potentially preclude the use of CST at DWPF.
Download or read book DWPF Glass Melter Technology Manual written by and published by . This book was released on 2005 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This document details information about the design of a glass melter to be used at the Defense Waste Processing Facility at the Savannah River Site. Topics include: Information discussed in the decision making processes, process description, equipment, materials, process controls, and supporting information such as safety, radiation, and contamination.
Download or read book Western Front 2007 written by and published by . This book was released on 2007 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Specimen animadversionum in epistolam syricacam Semeonis Beth Arsamensisde Barsauma episcopo Nisibeno deque haeresi Nestorianorum written by and published by . This book was released on 1788 with total page 27 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Pollution Abstracts written by and published by . This book was released on 1995 with total page 638 pages. Available in PDF, EPUB and Kindle. Book excerpt: Indexes material from conference proceedings and hard-to-find documents, in addition to journal articles. Over 1,000 journals are indexed and literature published from 1981 to the present is covered. Topics in pollution and its management are extensively covered from the standpoints of atmosphere, emissions, mathematical models, effects on people and animals, and environmental action. Major areas of coverage include: air pollution, marine pollution, freshwater pollution, sewage and wastewater treatment, waste management, land pollution, toxicology and health, noise, and radiation.
Download or read book Steady and Transient Thermal Analysis of the DWPF Melter Operation written by H. N. Guerrero and published by . This book was released on 2003 with total page 5 pages. Available in PDF, EPUB and Kindle. Book excerpt: At HLW Division's request, an analysis has been performed of power usage at characteristic times in the Defense Waste Processing Facility production. For the first time in the Department of Energy complex, a program has been developed permitting the monitoring or systematic categorizing of power and heat distribution in an operating waste glass production melter. To date, the Defense Waste Processing Facility Melter power and heat trends have been analyzed in terms of individual or total power sources. The method applied here provides a steady state balance between melter power inputs and various heat losses under continuous feeding/pouring or idling conditions. Power comes from two electrode circuits and separately controlled dome heaters. Heat energy is lost through the melter shell, as well as evaporation of water, heating of steam and in-leakage air, chemical reactions, and heating of glass. These various power consumption pathways are not constant and depend on melter operation, such as feed rate, solids ratio, feed batch and net melt pool circulation. The analysis uses the lumped parameter approach to sum the power inputs and proportion them to the various power uses, providing an overall perspective of the power distribution. Through the analysis of a practical melt rate model (personal computer based), the separate effects of engineering and physico-chemical batch effects can be obtained for quick evaluation of their effects on melt rate. The thermal model provides the framework where laboratory determination of batch effects, e.g., specific heat, viscosity, thermal conductivity, etc., can be fed in and the melt rate predicted.
Download or read book The Office of Environmental Management Technical Reports written by and published by . This book was released on 1997 with total page 972 pages. Available in PDF, EPUB and Kindle. Book excerpt:
