Nanosecond pulsed laser decontamination of stainless steel; Spatial and temporal resolution measurement of dust particles

Kosuge, Atsushi  ; Yamamoto, Keisuke*; Ando, Kota*; Nakajima, Takashi*

Decommissioning of nuclear reactors generates a large amount of radioactive waste. Laser decontamination methods have recently attracted attention as an efficient and safe method for decontaminating these wastes. Since the micro/nano dust generated during laser decontamination is radioactive, it is important to establish an efficient method for collecting the dust. In this study, an uncontaminated metal sample was irradiated with a nanosecond pulsed laser pulse, and the dependence of dust shape and particle velocity on pulse duration at a distance from the target was measured.