Thermodynamic modelling of the (U, Pu, Np)O2±x mixed oxide
Creators
- 1. Department of Information Engineering, College of Industrial Technology, 1-27-1 Nishikoya, Amagasaki, Hyogo 661-0047 (Japan)
- 2. Department of Nuclear Engineering, Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871 (Japan)
- 3. Plutonium Fuel Technology Group, Advanced Fuel Recycle Technology Division, Waste Management and Fuel Cycle Research Center, Japan Nuclear Cycle Development Institute, 4-33 Muramatu, Tokai-Mura, Ibaraki 319-1194 (Japan)
- 4. Alpha-Gamma Section, Fuels and Materials Division, Irradiation Center, O-arai Engineering Center, Japan Nuclear Cycle Development Institute, Narita-cho 4002, O-arai-machi, Ibaraki 311-1393 (Japan)
Description
To assess the phase stability of actinide oxides with a fluorite structure which has a variable composition (MO2±x), thermodynamic modelling has been performed for O-Pu-U-Np quaternary systems on the basis of thermodynamic data available in the literature. Using the thermodynamic data for O-Pu, O-U and O-Np binary systems obtainable in the literature, the thermodynamic modelling for O-Pu-U-Np quaternary system was carried out by a means of CALculation of PHAse Diagram (CALPHAD) technique. Using this model, the oxygen potentials for (Pu0.3U0.7)O2, (Pu0.3U0.65Np0.05)O2 and (Pu0.3U0.58Np0.12)O2 were calculated between 1123 K and 1973 K and compared with the experimental data. Interaction parameters required for calculation of the Gibbs free energy of the solid solution phase were estimated for O-Pu-U-Np system
Additional details
Identifiers
- DOI
- 10.1016/j.jnucmat.2005.04.021;
- PII
- S0022-3115(05)00204-7;
Publishing Information
- Journal Title
- Journal of Nuclear Materials
- Journal Volume
- 344
- Journal Issue
- 1-3
- Journal Page Range
- p. 84-88
- ISSN
- 0022-3115
- CODEN
- JNUMAM
Conference
- Title
- 11. international symposium on thermodynamics of nuclear materials
- Acronym
- STNM-11
- Dates
- 6-9 Sep 2004
- Place
- Karlsruhe (Germany)
INIS
- Country of Publication
- Netherlands
- Country of Input or Organization
- International Atomic Energy Agency (IAEA)
- INIS RN
- 37010745
- Subject category
- S38: RADIATION CHEMISTRY, RADIOCHEMISTRY AND NUCLEAR CHEMISTRY;
- Resource subtype / Literary indicator
- Conference, Numerical Data
- Descriptors DEI
- EXPERIMENTAL DATA; FLUORITE; INTERACTIONS; NEPTUNIUM OXIDES; OXYGEN POTENTIAL; PHASE DIAGRAMS; PHASE STABILITY; PLUTONIUM OXIDES; SOLID SOLUTIONS; TEMPERATURE RANGE 1000-4000 K; URANIUM OXIDES
- Descriptors DEC
- ACTINIDE COMPOUNDS; CHALCOGENIDES; DATA; DIAGRAMS; DISPERSIONS; ENERGY; FREE ENTHALPY; HALIDE MINERALS; HOMOGENEOUS MIXTURES; INFORMATION; MINERALS; MIXTURES; NEPTUNIUM COMPOUNDS; NUMERICAL DATA; OXIDES; OXYGEN COMPOUNDS; PHYSICAL PROPERTIES; PLUTONIUM COMPOUNDS; SOLUTIONS; STABILITY; TEMPERATURE RANGE; THERMODYNAMIC PROPERTIES; TRANSURANIUM COMPOUNDS; URANIUM COMPOUNDS
Optional Information
- Copyright
- Copyright (c) 2005 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.