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http://dx.doi.org/10.1016/j.net.2017.02.004

High-power fiber laser cutting parameter optimization for nuclear Decommissioning  

Lopez, Ana Beatriz (IDMEC, Instituto Superior Tecnico, Universidade de Lisboa)
Assuncao, Eurico (IDMEC, Instituto Superior Tecnico, Universidade de Lisboa)
Quintino, Luisa (IDMEC, Instituto Superior Tecnico, Universidade de Lisboa)
Blackburn, Jonathan (TWI Ltd.)
Khan, Ali (TWI Ltd.)
Publication Information
Nuclear Engineering and Technology / v.49, no.4, 2017 , pp. 865-872 More about this Journal
Abstract
For more than 10 years, the laser process has been studied for dismantling work; however, relatively few research works have addressed the effect of high-power fiber laser cutting for thick sections. Since in the nuclear sector, a significant quantity of thick material is required to be cut, this study aims to improve the reliability of laser cutting for such work and indicates guidelines to optimize the cutting procedure, in particular, nozzle combinations (standoff distance and focus position), to minimize waste material. The results obtained show the performance levels that can be reached with 10 kW fiber lasers, using which it is 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 $CO_2$ and ND:YAG lasers. Thus, the main factor that affects the kerf width is the focal position, which means that minimum laser spot diameters are advised for smaller kerf widths.
Keywords
Decommissioning; Fiber Laser Cutting; High-power Lasers; Kerf Width Analysis; Nozzle Combinations; Nuclear Facilities;
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