[1L01-03] Liquid Metal Compatibility with Structural Material

[1L03] Corrosion behaviors of F82H steel in liquid metal heat transfer mediums Li, Na, and, NaK of A-FNS

*Tatsuhiro Hosaka¹, Masatoshi Kondo¹, Satoshi Sato², Masami Ando², Takashi Nozawa² (1. Tokyo Tech, 2. QST)

Keywords:Fusion reactor, Heat transfer medium, Liquid metal, Reduced activation ferritic martensitic steel, Grain boundary attack

Liquid Li, Na, and NaK are the candidate heat transfer mediums for the neutron irradiation tests in advanced fusion neutron source. The corrosion of the RAFM steel F82H by the heat transfer mediums must be made clear to clarify the change of the material properties by the neutron irradiation. The purpose of the present study is to make clear the corrosion behaviors of F82H in the heat transfer mediums by means of the static corrosion tests at various conditions. The formation kinetics of pebble-like morphology and the behaviors of grain boundary attack in the liquid metals were made clear.