Author: Luis A. MoralesPublisher:
ISBN:
Category :
Languages : en
Pages : 0
Book Description
Kinetics of reaction between plutonium dioxide and water at 25°C to 350°C : formation and properties of the PuO2+x phase
Author: Luis A. MoralesKinetics of Reaction Between Plutonium Dioxide and Water at 25 C to 350 C
Author: Publisher:
ISBN:
Category :
Languages : en
Pages : 5
Book Description
Results of microbalance, pressure-volume-temperature, and mass spectrometric measurements show that a higher oxide of plutonium, PuO{sub 2+x}, and hydrogen are formed by reaction of plutonium dioxide with water at 25 C to 350 C. PuO{sub 2+x} has an intense green color consistent with the presence of Pu(VI). An oxide composition in excess of PuO{sub 2.25} is identified, but the maximum value of x is undefined. Reaction rates derived from linear mass-time and pressure-time data are described by an Arrhenius relationship that yields an activation energy of 9.4 " 0.6 kcal/mol for the PuO2 + H2O reaction. X-ray diffraction data for PuO{sub 2+x} shows that the oxide has a fluorite-related structure consistent with substitution of Pu(VI) on cationic lattice sites and accommodation of additional oxygen on interstitial sites. The cubic lattice parameter has a low, but well-defined, linear dependence on the O:Pu ratio, suggesting that PuO{sub 2+x} forms as a continuous solid solution. The failure of earlier attempts to prepare higher oxides of plutonium is attributed to slow oxidation kinetics and insensitivity of diagnostic techniques. Similarities of the PuO{sub 2+x} and UO{sub 2+x} phase are examined and relevance of the results to plutonium technology and environmental issues is discussed.
The Reaction Between Plutonium and Deuterium
Author: David F. BowersoxPublisher:
ISBN:
Category : Chemical kinetics
Languages : en
Pages : 12
Book Description
... A Brief History of Road Conditions and Legislation in California ...
Author: Marsden MansonLos Alamos Science
Author: Reaction Kinetics for the High Temperature Oxidation of Pu--1wt%Ga in Water Vapor
Author: Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
Oxidation of plutonium metal is greatly accelerated by the presence of water vapor. The magnitude of the effect of water vapor on oxidation kinetics is determined by temperature, water concentration, and oxygen concentration. Most of the previous work has been directed toward evaluating the effect of moisture on the atmospheric oxidation of plutonium. Work on the isolation and characterization of the water reaction with plutonium has been very limited. The present work was undertaken to determine the kinetics of the plutonium--water reaction over a wide range of temperature and pressure. Reaction kinetics were measured using a vacuum microbalance system. The temperature range investigated was 100--500/degree/C. The effect of water vapor pressure on reaction kinetics was determined at 300/degree/C by varying the water pressure from 0.1 to 15 Torr. 2 figs.
Nuclear Science Abstracts
Author: Plutonium Futures -- The Science
Author: Gordon D. JarvinenPublisher: American Institute of Physics
ISBN:
Category : Science
Languages : en
Pages : 448
Book Description
Over 1,000 tons of plutonium exist throughout the world in the form of nuclear fuel, nuclear weapons, inventories of various types, and legacy materials. Regardless of ones views of how this condition came to be, or what actions are taken in the future, it is a certainty that large quantities of plutonium must be managed for many decades. Thus it is clear that the plutonium challenge is not only scientific, but political and socioeconomic as well. In view of the global nature of plutonium research efforts, the Plutonium Futures - The Science conference was established to increase awareness of the importance of the scientific underpinnings of plutonium research, and facilitate communication among its international practitioners. The 2003 conference is the third in this series; the two previous conferences were held in Santa Fe in 1997 and 2000. Extended abstracts of the presentations cover the latest results in plutonium condensed matter physics, materials science, compounds and complexes, environmental behavior, detection and analysis, separations and purification, nuclear fuel cycles, and waste isolation and disposal.
Nuclear Science Abstracts
Author: Encyclopedia of Environmental Analysis and Remediation, Volume 6
Author: Robert A. MeyersPublisher: Wiley-Interscience
ISBN: 9780471166320
Category : Science
Languages : en
Pages : 680
Book Description
With the growing concern over the environment, new industries and research areas have been developed to identify, monitor, regulate, and legislate environmental interactions as well as to determine and repair existing environmental damage. For both the expert and the newcomer, a quick, convenient, and comprehensive source is needed to answer questions on the rapidly increasing amount of environmental information. The Encyclopedia of Environmental Analysis and Remediation (EEAR) responds to this need by providing the reader with an in-depth examination of the environmental analysis and remediation fields in a single eight-volume reference source.