[2L08-13] Decommissioning of 1F

4:00 PM - 4:15 PM JST(7:00 AM - 7:15 AM UTC)

[2L13] Assessment of dust dispersion data for future safety analysis of Fukushima Daiichi fuel debris retrieval(16)Simulation of dust dispersion in the core boring cutting experiment

*Kenta Kato¹, Kenta Inagaki¹, Tadafumi Koyama¹, Koichi Uozumi¹, Taizo Kanai¹, Kinya Nakamura¹, Shun Kanagawa¹, Takatoshi Hijikata¹, Tetsuya Kato¹, Daisuke Yamauchi² (1. CRIEPI, 2. TEPCO HD)

Keywords:

dust,simulation,particle tracking method,dispersion ratio,debris

We conducted cutting experiments by using several kinds of cutting methods including a core boring for safety assessment of fuel retrieval. In the case of the core boring, few aerosols were dispersed, so the experiments were conducted in the 30 cm cubic box to elucidate the detail of the transport behavior of aerosols. In the experiments, several sampling nozzles to capture aerosols were placed around a core boring bit. In this study, we calculated the captured ratio by each sampling nozzle on the basis of the particle tracking method. Our results show the amount of captured aerosols depends on the volume flow rate of the sampling nozzle, which indicates no specific behavior with sampling points or flow rate is estimated.