Patent Number: 
Section: claims

1. A nuclear fuel particle, comprising:a fuel kernel;a buffer graphitic carbon layer;an inner pyrolytic carbon layer;a multilayer pressure vessel including at least three layers in which a pyrolytic graphite layer is present between two layers of silicon carbide, wherein a thickness of the silicon carbide layers of the multilayer pressure vessel is at least 2 times a thickness of the pyrolytic graphite layers of the multilayer pressure vessel; andan outer pyrolytic carbon layer. 2. The nuclear fuel particle according to claim 1, wherein the multilayer pressure vessel includes at least two additional pairs of pyrolytic graphite layer and silicon carbide layer between the pyrolytic graphite layer and one of the two layers of silicon carbide. 3. The nuclear fuel particle according to claim 1, wherein the multilayer pressure vessel includes at least one additional pair of pyrolytic graphite layer and silicon carbide layer between the pyrolytic graphite layer and one of the two layers of silicon carbide. 4. The nuclear fuel particle according to claim 3, wherein the pyrolytic graphite layer(s) and the silicon carbide layer(s) alternate throughout the multilayer pressure vessel, thereby the pyrolytic graphite layers separate layers of silicon carbide. 5. The nuclear fuel particle according to claim 1, wherein each of the pyrolytic graphite layers of the multilayer pressure vessel has a thickness from 20 nm to 1000 nm. 6. The nuclear fuel particle according to claim 1, wherein the fuel kernel includes fissile and/or fertile materials in an oxide, carbide, or oxycarbide form. 7. The nuclear fuel particle according to claim 1, wherein the fuel kernel includes low enriched uranium (LEU).