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        High-power fiber laser cutting parameter optimization for nuclear Decommissioning

        Ana Beatriz Lopez,Eurico Assunç~ao,Luisa Quintino,Jonathan Blackburn,Ali Khan 한국원자력학회 2017 Nuclear Engineering and Technology Vol.49 No.4

        For more than 10 years, the laser process has been studied for dismantling work; however, relatively fewresearch works have addressed the effect of high-power fiber laser cutting for thick sections. Since in thenuclear sector, a significant quantity of thick material is required to be cut, this study aims to improve thereliability of laser cutting for such work and indicates guidelines to optimize the cutting procedure, inparticular, nozzle combinations (standoff distance and focus position), to minimize waste material. Theresults obtained show the performance levels that can be reached with 10 kW fiber lasers, using which itis possible to obtain narrower kerfs than those found in published results obtained with other lasers. Nonetheless, fiber lasers appear to show the same effects as those of CO2 and ND:YAG lasers. Thus, themain factor that affects the kerf width is the focal position, which means that minimum laser spot diametersare advised for smaller kerf widths.

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