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Shirasu, Noriko; Otobe, Haruyoshi; Kurata, Masaki
no journal, ,
The phase relations of the U-Fe-O system and the phase stability of the ternary compound UFeO
were investigated. The thermodynamic modelling has been performed for the U-Fe-O ternary system based on the obtained data and reported phase diagram of UO
-FeO
system.
Shirasu, Noriko
no journal, ,
This lecture consists of the basics of phase diagrams and the Calphad methodology, and introduction of thermodynamic analysis for the fuel materials. In the lecture, the thermodynamic analysis for U-Zr-O system and the thermodynamic evaluation on chemical reaction between degraded nuclear fuel and BC control rod are described.
Amamoto, Ippei; Oyama, Koichi; Nagano, Yuichi*; Jantzen, T.*; Hack, K.*; Fukayama, Daigen*
no journal, ,
As the vitrified study of the high-level radioactive waste is usually carried out under the high-temperature circumstance, it spends a lot of time and effort. The actual experiments and/or measurement, therefore, should be undertaken rationally after ascertaining the behaviors of target materials by the theoretical calculation, if possible. From such point of view, the construction of phase diagrams is considered after obtaining necessary thermodynamic properties from existing phase diagrams by CALPHAD method and/or published data. In this paper, several phase diagrams are presented such as the borosilicate glass which is currently used as the vitrified medium for the HLW, the iron-phosphate glass which will be potential vitrified medium for various wastes. Some phase diagrams are also prepared for the vitrified wastes which was loaded fission products such as molybdenum, palladium, etc..
-BO
-NaO-LiO systemAmamoto, Ippei; Oyama, Koichi; Fukayama, Daigen*; Nagano, Yuichi*; Hack, K.*; Jantzen, T.*
no journal, ,
The thermodynamic data of glass medium and FP, essential for estimation of the technical development of HLW as vitrified waste, is obtained by the CALPHAD method. As Ru-Rh-Pd-SiO-BO-NaO-LiO system could be constructed this time, it became possible to construct the phase diagram and/or estimation of FP loading amount under various conditions.
Amamoto, Ippei; Oyama, Koichi; Nagano, Yuichi*; Nagao, Saichi*; Kitajima, Hideki*; Taneda, Naoki*; Maruyama, Tsutomu*; Sakai, Mitsuyoshi*; Nishikawa, Nobutaka*
no journal, ,
MATRIX database has been constructed to obtain experimental phase diagram using Interglad. It also possesses functions such as literature search, construction of computational phase diagrams by the thermodynamic method using FactSage as well as estimation of viscosity, density and/or electric resistance of certain glasses by neural network method.