Deposition of Draphite Dust in Heat Gas Duct in HTR-10

The deposition of graphite dust in heat gas duct of 10MW high temperature gas-cooled reactor （HTR-10） was analyzed.The deposition efficiency of graphite dust in heat gas duct was obtained,which was necessary to estimate the radioactivity activity at the surface of heat gas duct.In the analysis,the turbulent deposition and thermophoretic deposition of graphite dust were involved.The calculation results revealed that the deposition amount of graphite dust in heat gas duct was small due to the large flow velocity of helium in heat gas duct.