Author: L. V. GurvichPublisher:
ISBN:
Category :
Languages : en
Pages : 14
Book Description
Calculating the Thermodynamic Functions of Gaseous Uranium, Plutonium and Their Ions Up to 20,000k
Author: L. V. GurvichEquation of State of Uranium Dioxide
Author: C. RonchiPublisher: Springer Science & Business Media
ISBN: 9783540221227
Category : Nature
Languages : en
Pages : 380
Book Description
The monograph deals with the thermodynamic properties of fluid uranium dioxide, one of the most investigated materials of the last century, up to its critical point. It presents an exhaustive theoretical introduction to "quasi-chemical" models of liquids, as well as their behaviour under non-congruent vaporisation conditions. Particular emphasis is given to the properties of pure Coulombic systems and to the pseudoparticle approach, which enables the partition function to be expressed in a simple, but physically rigorous formulation. The construction of the equation of state of stoichiometric and non-stoichiometric uranium dioxide is described in distinct steps, from a critical assessment of the theoretical fundamentals to a thorough review of the pertinent thermochemical and thermophysical data. Calculations of the thermodynamic properties of UO2+x are performed for temperatures up to 11,000 K both for the condensed and gas phase. More than one hundred tables are collected in the Appendix containing all relevant thermodynamic data.
Tables of Thermodynamic Functions for Gaseous Thorium, Uranium, and Plutonium Oxides
Author: Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
Measured and estimated spectroscopic data for thorium, uranium, and plutonium oxide vapor species have been used with the methods of statistical mechanics to calculate thermodynamic functions. Some inconsistencies between spectroscopic data and some thermodynamic data have been resolved by recalculating .delta. H°/sub f/ (298.15°K) values for the vapor species of these oxides. Evaluation of the uncertainties in data, methods of estimating molecular parameters, and effects of assumptions have been discussed elsewhere. The tables of thermodynamic functions that were reported earlier have been revised principally because the low-frequency vibrational modes of UO2 and UO3 have now been measured. These new empirical data resulted in changes in the electronic contributions to the calculated thermodynamic functions of UO2 and the estimated vibrational contributions for PuO2. In addition, some minor changes have been made in the methods of calculation of the electronic contributions for all molecules.
Chemical Thermodynamics of Neptunium and Plutonium
Author: Robert J. LemirePublisher: Elsevier
ISBN: 9780444503794
Category : Medical
Languages : en
Pages : 876
Book Description
Unlike earlier books in this series, this review describes the selection of chemical thermodynamic data for species of two elements, neptunium and plutonium. Although this came about more by circumstance than design, it has allowed for a more consistent approach to chemical interpretation than might have occurred in two separate treatments. It has also drawn attention to cases where the available data do not show expected parallels, and where further work may be useful to confirm or refute apparent differences in the behaviour of neptunium and plutonium.
Technical Abstract Bulletin
Author: Technical Translations
Author: Government-wide Index to Federal Research & Development Reports
Author: Publisher:
ISBN:
Category : Government publications
Languages : en
Pages : 726
Book Description
Update on the Chemical Thermodynamics of Uranium, Neptunium, Plutonium, Americium and Technetium
Author: R. GuillaumontPublisher:
ISBN:
Category : Science
Languages : en
Pages : 976
Book Description
This volume is part of the series on "Chemical Thermodynamics", published under the aegis of the OECD Nuclear Energy Agency, and updates and expands the thermodynamic data on inorganic compounds and complexes of uranium, neptunium, plutonium, americium and technetium contained in the previous volumes of the series. A review team, composed of seven internationally recognized experts, has critically reviewed during five years all the scientific literature containing chemical thermodynamic information for the above mentioned systems that has appeared since the publication of the earlier volumes. The results of this critical review carried out following the Guidelines of the OECD NEA Thermochemical Database Project have been documented in the present volume, which contains new tables of selected values for formation and reaction thermodynamical properties and an extensive bibliography.
Calculated Thermodynamic Functions for Gas Phase Uranium, Neptunium, Plutonium, and Americium Oxides (AnO3), Oxyhydroxides (AnO2(OH)2), Oxychlorides (AnO2Cl2), and Oxyfluorides (AnO2F2).
Author: Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
Based on known and estimated molecular constants, the thermodynamic functions, C{sub p}, S{sup o}, H{sup o}-H{sup o}(298), and -(G{sup o} - H{sup o}(298))/T, have been calculated and tabulated for actinide vapors species of the formulas AnO3(g), AnO2(OH)2(g), AnO2Cl2(g), and AnO2F2(g) where An = U, Np, Pu, and Am. A method to calculate the thermodynamic functions for the mixed species, AnO2ClOH(g), AnO2FOH(g), and AnO2FCl(g), is also given.
Author: David W. Green