Download or read book Technetium Chemistry in HLW written by Nancy J. Hess and published by . This book was released on 2005 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Tc contamination is found within the DOE complex at those sites whose mission involved extraction of plutonium from irradiated uranium fuel or isotopic enrichment of uranium. At the Hanford Site, chemical separations and extraction processes generated large amounts of high level and transuranic wastes that are currently stored in underground tanks. The waste from these extraction processes is currently stored in underground High Level Waste (HLW) tanks. However, the chemistry of the HLW in any given tank is greatly complicated by repeated efforts to reduce volume and recover isotopes. These processes ultimately resulted in mixing of waste streams from different processes. As a result, the chemistry and the fate of Tc in HLW tanks are not well understood. This lack of understanding has been made evident in the failed efforts to leach Tc from sludge and to remove Tc from supernatants prior to immobilization. Although recent interest in Tc chemistry has shifted from pretreatment chemistry to waste residuals, both needs are served by a fundamental understanding of Tc chemistry.
Download or read book Technetium Chemistry in HLW written by and published by . This book was released on 2004 with total page 5 pages. Available in PDF, EPUB and Kindle. Book excerpt: Tc contamination is found within the DOE complex at those sites whose mission involved extraction of plutonium from irradiated uranium fuel or isotopic enrichment of uranium. At the Hanford Site, chemical separations and extraction processes generated large amounts of high level and transuranic wastes that are currently stored in underground tanks. Technetium is thought to have followed U in bismuth phosphate, REDOX and PUREX extraction campaigns and the Cs and Sr isotope recovery efforts. The waste from these extraction processes is currently stored in underground High Level Waste (HLW) tanks. However, the chemistry of the HLW in any given tank is greatly complicated by repeated efforts to reduce volume and recover isotopes. These processes ultimately resulted in mixing of waste streams from different processes. As a result, the chemistry and the fate of Tc in HLW tanks are not well understood. This lack of understanding has been made evident in the failed efforts to leach Tc from sludge and to remove Tc from supernatants prior to immobilization. Although recent interest in Tc chemistry has shifted from pretreatment chemistry to waste residuals, both needs are served by a fundamental understanding of Tc chemistry. The fate of Tc in the insoluble salts that constitute tank residuals is of paramount importance due to the long half-life and environmental mobility of Tc. Knowledge gaps include determination of the Tc oxidation state, the stability of reduced Tc solution species, and interactions with possible organic complexants in HLW. The objective of this renewal proposal is to continue to pursue fundamental understanding of Tc solution chemistry that provides the basis to make knowledgeable decisions and predictions of Tc behavior during retrieval operations and in tank residuals.
Download or read book Technetium Chemistry in High Level Waste written by Nancy J. Hess and published by . This book was released on 2006 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Tc contamination is found within the DOE complex at those sites whose mission involved extraction of plutonium from irradiated uranium fuel or isotopic enrichment of uranium. At the Hanford Site, chemical separations and extraction processes generated large amounts of high level and transuranic wastes that are currently stored in underground tanks. The waste from these extraction processes is currently stored in underground High Level Waste (HLW) tanks. However, the chemistry of the HLW in any given tank is greatly complicated by repeated efforts to reduce volume and recover isotopes. These processes ultimately resulted in mixing of waste streams from different processes. As a result, the chemistry and the fate of Tc in HLW tanks are not well understood. This lack of understanding has been made evident in the failed efforts to leach Tc from sludge and to remove Tc from supernatants prior to immobilization. Although recent interest in Tc chemistry has shifted from pretreatment chemistry to waste residuals, both needs are served by a fundamental understanding of Tc chemistry.
Download or read book Technetium written by Klaus Schwochau and published by John Wiley & Sons. This book was released on 2008-11-21 with total page 461 pages. Available in PDF, EPUB and Kindle. Book excerpt: Dieses einzigartige Handbuch gibt eine umfassende Übersicht über den aktuellen Stand der Technetium-Chemie und die Anwendung von Technetium in der Radiopharmazie. Klar und präzise dargestellt werden alle wichtigen Aspekte wie · natürliches und künstlich verursachtes Vorkommen in der Umwelt, · Isotope und Isomere, · Analytische Chemie und Biochemie, · thermodynamische Daten, Stabilität und Reaktivität, · intermetallische und binäre Verbindungen, und vor allem · Komplexchemie sowie · radiopharmazeutischer Einsatz. Dieses herausragende Werk erlaubt sowohl Experten als auch Laien mit naturwissenschaftlicher Bildung einen schnellen Zugang zu wichtiger Information. Deshalb ist das Handbuch genauso unverzichtbar für Forscher an Universitäten und Instituten, in der Nuklearmedizin und radiopharmazeutischen Industrie wie für wissenschaftliche Berater in Regierungen und Umweltverbänden.
Download or read book Stobwasser s Bilderkabinet in Berlin written by and published by . This book was released on 1986 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Redox solubility and sorption chemistry of technetium in dilute to concentrated saline systems written by Yalcintas, Ezgi and published by KIT Scientific Publishing. This book was released on 2015-11-11 with total page 136 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Research Program to Investigate the Fundamental Chemistry of Technetium written by Carol J. Burns and published by . This book was released on 2003 with total page 55 pages. Available in PDF, EPUB and Kindle. Book excerpt: The objective of this research is to increase the knowledge of the fundamental technetium chemistry that is necessary to address challenges to the safe, long-term remediation of high-level waste posed by this element. These challenges may be divided into two categories: unexpected behavior of technetium in high-level waste tanks at the Hanford and Savannah River Sites and the behavior of technetium in waste forms.
Download or read book Chemical Separation Technologies and Related Methods of Nuclear Waste Management written by Gregory R. Choppin and published by Springer Science & Business Media. This book was released on 1999-02-28 with total page 324 pages. Available in PDF, EPUB and Kindle. Book excerpt: Separation technologies are of crucial importance to the goal of significantly reducing the volume of high-level nuclear waste, thereby reducing the long-term health risks to mankind. International co-operation, including the sharing of concepts and methods, as well as technology transfer, is essential in accelerating research and development in the field. The writers of this book are all internationally recognised experts in the field of separation technology, well qualified to assess and criticize the current state of separation research as well as to identify future opportunities for the application of separation technologies to the solution of nuclear waste management problems. The major emphases in the book are research opportunities in the utilization of innovative and potentially more efficient and cost effective processes for waste processing/treatment, actinide speciation/separation methods, technological processing, and environmental restoration.
Download or read book Technetium IV Complexation Chemistry with Polyamino Polycarboxylate Ligands written by Trevor Omoto and published by . This book was released on 2017 with total page 154 pages. Available in PDF, EPUB and Kindle. Book excerpt: Controlling the redox chemistry is one potential channel of limiting the mobility of 99Tc that has been released into the environment, as the +4 oxidation state of technetium has been shown to have limited water solubility and sorption onto mineral surfaces. While these properties suggest Tc(IV) will have low mobility through underground waters, complexation with ligands found in either the environment or storage facilities could greatly increase the dissolution of Tc(IV) into waters.
Download or read book Technetium Chemistry written by and published by . This book was released on 1996 with total page 5 pages. Available in PDF, EPUB and Kindle. Book excerpt: Technetium chemistry is a young and developing field. Despite the limited knowledge of its chemistry, technetium is the workhorse for nuclear medicine. Technetium is also a significant environmental concern because it is formed as a byproduct of nuclear weapons production and fission-power generators. Development of new technetium radio-pharmaceuticals and effective environmental control depends strongly upon knowledge of basic technetium chemistry. The authors performed research into the basic coordination and organometallic chemistry of technetium and used this knowledge to address nuclear medicine and environmental applications. This is the final report of a three-year Laboratory-Directed Research and Development (LDRD) project at the Los Alamos National Laboratory (LANL).
Download or read book Technetium written by V.I Spitzin and published by . This book was released on 1988 with total page 21 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Studies of the Chemistry of Technetium V written by Bruno Vincent DePamphilis and published by . This book was released on 1981 with total page 294 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Analytical Chemistry of Technetium Promethium Astatine and Francium written by A.K. Lavrukhina and published by . This book was released on 1968 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A review of some aspects of the solution chemistry of technetium written by M. A. Hughes and published by . This book was released on 1987 with total page 13 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Chemistry of Technetium in Labeling Radiopharmaceuticals written by Azuwuike Owunwanne and published by . This book was released on 1982 with total page 206 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Chemistry of Technetium written by Silvia Sabine Jurrisson and published by . This book was released on 1982 with total page 250 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Chemistry of Technetium and Thenium written by R. D. Peacock and published by . This book was released on 1966 with total page 137 pages. Available in PDF, EPUB and Kindle. Book excerpt:
