Vapor pressures and vapor compositions in equilibrium with hypostoichiometric plutonium dioxide at high temperatures

Technical Report · Tue Jun 01 00:00:00 EDT 1982

DOI:https://doi.org/10.2172/7031792· OSTI ID:7031792

Green, D W; Fink, J K; Leibowitz, L

Vapor pressures and vapor compositions in equilibrium with a hypostoichiometric plutonium dioxide condensed phase have been calculated for the temperature range 1500 less than or equal to T less than or equal to 4000 K. Thermodynamic functions for the condensed phase and for each of the gaseous species were combined with an oxygen-potential model to obtain the partial pressures of O/sub 2/, O, Pu, PuO, and PuO/sub 2/. New thermodynamic functions for the solid oxide were calculated from available information and from new estimates of the heat capacity of the liquid. Thermodynamic functions for the vapor species were calculated previously. A suitable oxygen-potential model has been used previously for the solid hypostoichiometric plutonium dioxide; this model has been extended into the liquid region using several alternative methods. The effects of these alternatives on the calculated oxygen pressures have been examined in detail.

• Research Organization: Argonne National Lab. (ANL), Argonne, IL (United States)
• DOE Contract Number: W-31-109-ENG-38
• OSTI ID: 7031792
• Report Number(s): ANL-CEN-RSD-82-1; ON: DE83000930
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
PLUTONIUM DIOXIDE
PHASE STUDIES
VAPOR PRESSURE
TEMPERATURE DEPENDENCE
VERY HIGH TEMPERATURE
ACTINIDE COMPOUNDS
CHALCOGENIDES
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
PLUTONIUM COMPOUNDS
PLUTONIUM OXIDES
THERMODYNAMIC PROPERTIES
TRANSURANIUM COMPOUNDS
360202* - Ceramics
Cermets
& Refractories- Structure & Phase Studies