Exelon, working with Westinghouse Electric Co., installed the world’s first 3D printed core component, a thimble plugging device, into a commercial nuclear reactor, Exelon Corp.’s Byron Unit 1 in the spring of 2020. The use of additive manufacturing has been limited in nuclear fuel applications; however, incorporating the swiftly evolving technology can clearly enable many benefits such as advanced fuel component designs, reducing costs, accelerating timelines, simplifying supply chains, enhancing safety and increasing performance.