A CLADDING TUBE FOR A FUEL ROD FOR A NUCLEAR REACTOR, A FUEL ROD, AND A FUEL ASSEMBLY

摘要

A cladding tube (11), a fuel rod and a fuel assembly are disclosed. The cladding tube comprises a tubular base component (20) having an outer surface (21) and an inner surface (22) defining an inner space (14) of the cladding tube housing a pile of fuel pellets (10). The tubular base component is made of a Zr-based alloy. A coating (23) is applied onto the outer surface for protecting the tubular base component from mechanical wear, oxidation and hydriding. The Zr-based alloy has the following composition: Zr = balance, Al = 0-2 wt%, Ti = 0-20 wt%, Sn = 0-6 wt%, Fe = 0-0.4 wt%, Nb = 0-0.4 wt%, O = 200-1800 wtppm, C = 0-200 wtppm, Si = 0-200 wtppm, and S = 0-200 wtppm. The total amount of Al+Ti+Sn > 2.5 wt% and ≤ 28 wt%.