2022 Fall Meeting

Presentation information

Oral presentation

V. Nuclear Fuel Cycle and Nuclear Materials » 505-3 Decommissioning Technology of Nuclear Facilities

[1B10-15] Cutting and Decontamination

Wed. Sep 7, 2022 3:50 PM - 5:30 PM Room B (E1 Bildg.2F No.21)

Chair:Haruo Morishige(Fukushima Nuclear Accident Countermeasures Review Group)

4:05 PM - 4:20 PM

[1B11] Laser decontamination mechanism using high-speed scanning of high-power density continuous wave fiber laser and high-speed camera

(2)Laser decontamination of Epoxy resin coated thick film

*Eisuke John Minehara1, Atsushi Kosuge2 (1. LDD, 2. JAEA)

Keywords:continuous wave fiber laser, high-speed scanning , high-power density, decontamination mechanism, Laser decontamination of Epoxy resin thick film

A nuclear power reactor is usually composed of about 400,000 tons of concrete and about several thousand tons of metal materials. Since decontamination of the power reactors is the removal of RI deposited on the surface of the components, epoxy-resin coated thick film, protective cover, plating film, rust, etc. that cover the surface of the components are first removed off to decontaminate them. Floors of the reactor building, biological shielding concrete wall, and many other metal equipments and parts are painted with the thick epoxy resin. Many of the latest epoxy-coated thick films have often very high resistance to laser irradiation, and they are known to be harder to peel off than stainless steel. Here, the mechanism of the laser peeling and decontamination of the epoxy-resin thick films and the simulated decontamination test will be reported using a high-power density, high-scanning-speed continuous-wave fiber laser and low-speed, and high-speed video cameras.