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ISSN : 1738-1894(Print)
ISSN : 2288-5471(Online)
ISSN : 2288-5471(Online)
532 nm 파장의 큐스위치 Nd:YAG 레이저를 이용한 스테인리스 스틸 표면 제염특성
Decontamination Characteristics of 304 Stainless Steel Surfaces by a Q-switched Nd:YAG Laser at 532 nm
Abstract
Metal surface decontamination characteristics were investigated by using a laser ablation method. A second harmonic generation of a Q-switched Nd:YAG laser with a wave length of 532 nm, a pulse energy of 150 mJ and a pulse width of 5 ns was employed to assess the decontamination performance for metal surfaces contaminated with CsNO3, Co(NH4)2(SO4)2, Eu2O3 and CeO2. The ablation behavior was investigated for the decontamination variables such as a number of laser shots, laser fluence and an irradiation angle. Their optimum values were found to be 8,13.3 J/cm2 and 30o, respectively. The decontamination efficiency was different depending on the kinds of the contaminated ions, due to their different melting and boiling points and was in the order: CsNO3>Co(NH4)2(SO4)2>Eu2O3>CeO2. We also evaluated a correlation between the metal ablation thickness and the number of laser shots for the different laser fluences.
용발 제염, 큐스위치 Nd:YAG 레이저, 2차 하모닉스, 고방사성 시설, 방사성 금속 폐기물, Ablation decontamination, Q-switched Nd:YAG laser, Second harmonic generation, High radioactive facilities, Radioactive metal waste
Reference
JNFCWT
Online Submission
Korean Radioactive
Waste Society (KRS)
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