Coagulating Evolution of Graphite Dust in Helium Flow of 10 MW HighTemperature Gas-Cooled Reactor

In the case of the cycle of spherical fuel element, it is inevitable to take place the wear of graphite components and generate the graphite dust in the core of 10 MW High-Temperature Gas-Cooled Reactor (HTR-10). The graphite dust with the side about 1 μm will flow in the primary circuit by carrying of helium. Under the action of Brownian motion, the particles collide and coagulate each other, and the distribution of particle size will be changed. The discrete-section model was employed to calculate the collision and coagulation of graphite dust in HTR-10. The calculated results indicate that the coagulation of graphite dust in HTR-10 is not serious.