[3E08-09] FP Behavior 1

[3E08] Measurement of ruthenium activity in ruthenium-palladium-rhodium alloys

*Jiazhan Liu¹, Naoya Miyahara¹, Shuhei Miwa¹, Masahide Takano¹, Masahiko Osaka¹ (1. Japan Atomic Energy Agency)

Keywords:Ru-Pd-Rh alloys, vaporization, thermogravimetric analysis, ruthenium activity

For improvement of the existing ruthenium (Ru) release model from fuel under a severe accident, Ru activity (a_Ru) of Ru-palladium (Pd)-rhodium (Rh) alloys was experimentally determined by a new method using thermogravimetric analysis (TGA). This method was validated by comparing the experimental results to the thermodynamic calculation results.