Abstract: A heat-transfer device and methods for forming the heat-transfer device are disclosed. The method includes forming a first green structure using digital light processing, the first green structure including a different porosity in at least two sections. The method also includes exposing the first green structure to heat to remove resin used during the digital light processing from the first green structure. The method further includes sintering the first green structure to form at least a portion of the heat-transfer device.

Abstract: A nuclear fuel element for a nuclear reactor comprises a body having a first region and a second region surrounded by the first region. The first segment comprises a poison material, and the second region comprises a nuclear fuel material and is substantially free of the poison material. A nuclear fuel element for use in a nuclear reactor comprises the body and a cladding material at least partially surrounding the body. Related methods of forming the nuclear fuel pellet include additive manufacturing processes to form first and second segments.