Patent Number: 
Section: claims

1. A nuclear fuel rod comprising:a container including:a support material defining an exterior facing surface having a roughness Ra in a range of 10 nm to 500 nm, wherein the support material includes zirconium, tin, niobium, iron, chromium, nickel, hafnium, alloys thereof, or a combination thereof;a rough material layer disposed over the exterior facing surface of the support material, the rough material layer comprising yttria-stabilized zirconia, wherein the roughness Ra of the rough material layer is in a range of 10 nm to 1 micrometer; anda ceramic nitride layer disposed over and in direct contact with the rough material layer, the ceramic nitride layer including silicon nitride, the ceramic nitride layer having a roughness Ra of at least 0.1% and not greater than 50% of the roughness Ra of the rough material layer; anda nuclear fuel disposed within the container. 2. The nuclear fuel rod of claim 1, wherein the rough material layer includes a crystalline material. 3. The nuclear fuel rod of claim 1, wherein the rough material layer has a thickness in a range of 50 nm to 5 micrometers. 4. The nuclear fuel rod of claim 3, wherein the rough material layer has a thickness in a range of 50 nm to 1 micrometer. 5. The nuclear fuel rod of claim 1, wherein the ceramic nitride is an enriched ceramic nitride, wherein the enriched ceramic nitride includes 2% to 20% 15N. 6. The nuclear fuel rod of claim 1, wherein the roughness Ra of the rough material layer is in a range of 50 nm to 500 nm. 7. The nuclear fuel rod of claim 1, wherein the support material is a zirconium alloy. 8. The nuclear fuel rod of claim 1, wherein the ceramic nitride is an enriched ceramic nitride, wherein the enriched ceramic nitride includes 80% to 99.99% 15N. 9. The nuclear fuel rod of claim 1, wherein the roughness Ra of the rough material layer is in a range of 50 nm to 1 micrometer. 10. The nuclear fuel rod of claim 1, wherein the roughness Ra of the rough material layer is greater than the roughness Ra of the exterior facing surface of the support material. 11. The nuclear fuel rod of claim 1, wherein the roughness Ra of the ceramic nitride layer is not greater than 40% of the roughness Ra of the rough material layer. 12. The nuclear fuel rod of claim 11, wherein the roughness Ra of the ceramic nitride layer is not greater than 30% of the roughness Ra of the rough material layer. 13. The nuclear fuel rod of claim 12, wherein the roughness Ra of the ceramic nitride layer is not greater than 25% of the roughness Ra of the rough material layer. 14. The nuclear fuel rod of claim 1, wherein the ceramic nitride layer is amorphous. 15. The nuclear fuel rod of claim 1, wherein the ceramic nitride layer is crystalline. 16. The nuclear fuel rod of claim 1, wherein the ceramic nitride layer has a thickness in a range of 50 nm to 10 micrometers. 17. The nuclear fuel rod of claim 16, wherein the ceramic nitride layer has a thickness in a range of 50 nm to 1 micrometer.