초단 펄스레이저 어블레이션에 의한 스테인리스강 표면의 오염산화막 제거 특성 (A Study on the Removal Characteristics of a Radioactively Contaminated Oxide Film from the irradiated Stainless Steel Surface using Short Pulsed Laser Ablation)

서지정보

· 발행기관 : 한국기계가공학회
· 수록지 정보 : 한국기계가공학회지 / 19권 / 10호 / 105 ~ 110페이지
· 저자명 : 김근우, 윤성식, 김기철, 이명원, 강명창

초록

Radioactive Oxides are formed on the surface of the primary equipment in a nuclear power plant. In orderto remove the oxide film that is formed on the surfaces of the equipment, chemical and physicaldecontamination technologies are used. The disadvantage of traditional technologies is that they producesecondary radioactive wastes. Therefore, in this study, the short-pulsed laser eco-friendly technology was usedin order to reduce production of the secondary radioactive wastes. They were also used to minimize thedamages that were caused on the base material and to remove the contaminated oxide film. The study wascarried out using a Stainless steel 304 specimen that was coated with nickel-ferrite particles. Further, the lasersource was selected with two different wavelengths. Furthermore, the depth of the coating layer was analyzedusing a 3D laser microscope by changing the laser ablation conditions. Based on the analysis, the optimalconditions of ablation were determined using a 1064nm short-pulsed laser ablation technique in order toremove the radioactively contaminated oxide film from the irradiated stainless steel surface.

영어초록

Radioactive Oxides are formed on the surface of the primary equipment in a nuclear power plant. In orderto remove the oxide film that is formed on the surfaces of the equipment, chemical and physicaldecontamination technologies are used. The disadvantage of traditional technologies is that they producesecondary radioactive wastes. Therefore, in this study, the short-pulsed laser eco-friendly technology was usedin order to reduce production of the secondary radioactive wastes. They were also used to minimize thedamages that were caused on the base material and to remove the contaminated oxide film. The study wascarried out using a Stainless steel 304 specimen that was coated with nickel-ferrite particles. Further, the lasersource was selected with two different wavelengths. Furthermore, the depth of the coating layer was analyzedusing a 3D laser microscope by changing the laser ablation conditions. Based on the analysis, the optimalconditions of ablation were determined using a 1064nm short-pulsed laser ablation technique in order toremove the radioactively contaminated oxide film from the irradiated stainless steel surface.

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