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Hirota, Masayuki*; Kurosaki, Ken*; Uno, Masayoshi*; Yamanaka, Shinsuke*; Miwa, Shuhei; Osaka, Masahiko; Tanaka, Kenya
no journal, ,
Thermodynamic parameters were evaluated through phase diagram calculation by the CALPHAD method, as well as preparation of thermodynamic data for minor actinide-oxygen (Am-O) system.
Hirota, Masayuki*; Kurosaki, Ken*; Uno, Masayoshi*; Yamanaka, Shinsuke*; Miwa, Shuhei; Osaka, Masahiko; Tanaka, Kenya
no journal, ,
In the present study, as a preliminary stage, to assess the phase stability of MA-containing MOX fuel with a fluorite structure which has a variable composition with oxygen defects in its structure, thermodynamic modeling has been performed for O-Am binary system and O-Pu-Am ternary system on the basis of thermodynamic data available in the literature. The interaction parameters of the excess Gibbs energies of the fluorite structure FCC-C1 phase in O-Am and O-Pu-Am systems were evaluated with respect to the deviation from the ideal solution in oxygen potential, respectively. The thermodynamic modeling used in this study is based on the CALculation of PHAse Diagram (CALPHAD) technique.
Hirota, Masayuki*; Kurosaki, Ken*; Uno, Masayoshi*; Yamanaka, Shinsuke*; Miwa, Shuhei; Osaka, Masahiko; Tanaka, Kenya
no journal, ,
Oxygen potentials of MA-containing oxide fuels were calculated and compared with those of experimental. The calculation was carried out using optimized thermodynamic parameters obtained by CALPHAD evaluation of actinide-oxygen binary system.
Hirota, Masayuki*; Kurosaki, Ken*; Uno, Masayoshi*; Miwa, Shuhei; Osaka, Masahiko; Tanaka, Kenya; Yamanaka, Shinsuke*
no journal, ,
Thermodynamic modeling has been performed in the binary, ternary, and quaternary systems based on the CALculation of PHAse Diagram (CALPHAD) technique, and the oxygen potential of the fluorite structure was assessed.