Abstract
At the commercial use stage in next generation nuclear energy systems such as sodium-cooled fast breeder reactors and advanced light-water reactors, securing maintenance and repair better than an equal to those of current water-cooled reactors is needed. Especially, establishment of a repair technology that secures the plant integrity for long-term operation period becomes indispensable. Then, experimental and analytical studies are started aiming at the world standardization of welding technology with a laser. As a part of those, in order to investigate the possibility of the laser welding simulation, melting characteristics of very small fine metal powders on a stainless steel plate were analyzed numerically. The fine metal powder is made of iron, and is heated by the laser beam, and then melts exceeding the melting temperature. This paper reports the predicted results of fine metal powders with the laser welding.
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