Simulation on the Decontamination Efficiency and Factor of Radioactive Waste Water Disposed by Supersonic Wave

We design the structural dimensions of the reactor for the supersonic-based disposing radioactive waste water in this paper. The disposing efficiencies have been simulated under several conditions, and obtained the total α radioactive concentration for the waste water as a function of disposing time, the impact of the supersonic frequency and the time-mean sound energy density on the disposing effectiveness, and the decontamination factor vs. disposing time. The results show that the total α radioactive concentration diminishes as the disposing time increases. The total α radioactive concentration will below the national emission standard, and the disposing time for reaching the emission standard diminishes as the supersonic frequency increases. When the supersonic frequencies are same, the total α radioactive concentration of the disposed radioactive waste water diminishes as the time-mean sound energy density increases under same disposing time, and the decontamination frequency increase as the time-mean sound energy density increases. The total α radioactive concentration of the disposed radioactive waste water diminishes as the time-mean sound energy density increases under other conditions being same. Under the same supersonic conditions, the supersonic decontamination factors for 10Bq/L and 20Bq/L radioactive waste water are same, namely the decontamination factors are independent of the initial radioactive concentration. Moreover, the supersonic decontamination factor for the suspended particles that obey the normal distribution with expectation value of 0.7μm and variance of 0.21 in the waste water is higher than that of the suspended particles that belong to the monodispersity particles. The designed supersonic reactor can satisfy the requirement of the disposing efficiency.