Estimation of Graphite Dust Resuspension in Steam Generator of HTR-10

According to the design instruction of HTR-10, helium flow velocity along with physical parameters are calculated in cold heating period, nucleate boiling, film boiling and overheating heating region of steam generator- the most remarkable amount of graphite dust deposition equipment. Improved Vainshtein model is applied to estimate resuspension fraction. Results show that the friction velocity along with resuspension fraction increases gradually in the height direction; time-related resuspension fraction has a short-term effect, and larger graphite particles turns out to be more easily removed in the same velocity.