|About this Abstract
||2016 TMS Annual Meeting & Exhibition
||Thermodynamic Applications, Optimizations and Simulations in High-Temperature Processes: An EPD Symposium in Honor of Christopher W. Bale's 70th Birthday
||Development of Thermodynamic Databases in the System U-Zr-Ce-Cs-Fe-B-C-I-O-H for Application to Simulating Phase Equilibria in Severe Nuclear Accidents
||Masanori Suzuki, Ken Kurosaki, Shinsuke Yamanaka, Toshihiro Tanaka, Masayoshi Uno, Yukihiro Murakami, Tatjana Jantzen, Stephan Petersen, Klaus Hack
|On-Site Speaker (Planned)
In case of severe nuclear accidents involving melting down of nuclear fuels at high temperatures, it is of quite importance to accurately evaluate highly-volatilizing behavior of fission products (FP) from multicomponent debris. In particular, cesium (Cs) and iodine (I) – bearing chemical species are regarded as notable FP. In the present work, the authors have constructed the original thermodynamic databases in the system U-Zr-Ce-Cs-Fe-B-C-I-O-H featuring Cs, I-bearing systems, which consist of oxide, iodide and metal (including borides and carbides) databases. It has been confirmed that the calculated phase diagrams by the present set of the databases well reproduce the corresponding literature data in various kinds of subsystems in the above multicomponent system. Then, the present set of databases has been successfully applied to predict phase equilibria and volatizing behavior of Cs, I-including species in multicomponent debris under specific temperature and atmosphere conditions corresponding to severe nuclear accidents.
||Planned: TMS Journal: Metallurgical and Materials Transactions