|About this Abstract
||2016 TMS Annual Meeting & Exhibition
||Materials and Fuels for the Current and Advanced Nuclear Reactors V
||AA-6: Thermodynamic Assessment of U-Eu-O System
||Atsuhiro Yoneda, Yuji Ohishi, Hiroaki Muta, Ken Kurosaki, Shinsuke Yamanaka, Masahiko Osaka, Shuhei Miwa, Akihiro Ishimi, Kozo Katsuyama
|On-Site Speaker (Planned)
In the Fukushima Daiichi nuclear disaster, a significant amount of fuel debris was formed in the reactor. Even in the severe accident, special nuclear material (SNM) accountancy of the molten debris is required by the regulatory bodies to ensure no diversion of SNMs. As one of the accountancy technologies, passive gamma spectrometry has been studied. In this method, high-energy gamma-emitting fission products (FPs) are quantified by the passive gamma spectrometry. When the FPs co-exist with the SNM in the debris, the amount of the SNM can be estimated from the FP-SNM correlation obtained by inventory calculation. Eu-154 is a candidate FP since it is one of the high-energy gamma-emitting FPs and known to co-exist with uranium in the normal spent fuels. A thermodynamic database is important to apply this method to the debris. In this study we aim to develop the database for U-Eu-O ternary system by CALPHAD technique.
||Planned: A print-only volume