[3L01-04] Decontamination Technology

10:15 AM - 10:30 AM JST(1:15 AM - 1:30 AM UTC)

[3L02] Development of nanosecond pulsed laser decontamination method(2) In-situ time- and space-resolved detection of micro/nano dusts

*Atsushi Kosuge¹, Kota Ando², Takashi Nakajima³ (1. JAEA, 2. JASRI, 3. Kyoto Univ.)

Keywords:

Nanosecond Pulsed Laser,Laser Decontamination,Decontamination mechanism,Radioactive Dust,Laser Scattering

Decommissioning generates a large amount of radioactive waste. Laser decontamination has been attracting attention in recent years as an efficient and safe method of decontamination. Since the micro- and nano-dust generated by laser decontamination is radioactive, it is also important to collect the scattered micro- and nano-dust.In this presentation, we report spatially resolved measurements of micro/nano dust particles by irradiating uncontaminated metal samples with highly repetitive nanosecond laser pulses. First, the shape and distribution of particles attached to several cover glasses placed in a hemispherical shape near the laser irradiation point were observed using a laser microscope. Next, laser scattering measurements of particles were performed using a collimated beam and a horizontally spread laser sheet.