[1A01-03] Fission Products

[1A03] Measurement of ruthenium activity in Ru-Pd binary alloy

*Jiazhan LIU¹, Kunihisa NAKAJIMA¹, Shuhei MIWA¹, Masahiko OSAKA¹ (1. JAEA)

Keywords:release model, Ru-Pd alloys, Ru activity, thermogravimetric analysis

In order to improve the existing ruthenium (Ru) release model from fuel in a severe accident, Ru activity (a_Ru) of Ru-palladium (Pd) alloys was measured by a new experimental method using thermogravimetric analysis. The measured a_Ru agrees well with that obtained from the existing binary phase diagram. This result indicates that this thermogravimetric method can be applied for the measurement of a_Ru in the Ru-Pd binary alloy.