2020 Fall Meeting

Presentation information

Oral presentation

V. Nuclear Fuel Cycle and Nuclear Materials » 501-2 Nuclear Fuel and the Irradiation Behavior

[2E14-18] Evaluation of severe accident and Cs behavior

Thu. Sep 17, 2020 4:25 PM - 5:50 PM Room E (Zoom room 5)

Chair:Masayoshi Uno(Univ. of Fukui)

4:25 PM - 4:40 PM

[2E14] Oxidation and evaporation behaviors of Mo under a severe accident conditions

*Jiazhan LIU1, Kunihisa NAKAJIMA1, Shuhei MIWA1, Hidetoshi KARASAWA1, Masahiko Osaka1 (1. Japan Atomic Energy Agency)

Keywords:severe accident, Mo, oxidation, evaporation

To construct a precise Mo release model in a severe accident, oxidation and evaporation behaviors of metallic Mo powders were investigated by the thermogravimetric analysis technique. The experimental results showed that oxidation and evaporation rates of Mo were influenced by oxygen diffusion rates in the gas phase and the solid MoO2 layer formed on the surface of Mo powders. Mechanism of these diffusions will be discussed.