CLADDING FOR A FUEL ROD FOR A LIGHT WATER REACTOR

Fuel rod cladding (4) for a tight water reactor, comprising: a core (16) comprising a matrix consisting of pure molybdenum or of a molybdenum-based alloy; and an outer protective layer (18), said outer protective layer (18) being selected among: a chromium-based coating (20) deposited on an outer surface of said core (16), said chromium-based coating (20) comprising at least one chromium-based coating layer (24) consisting of pure chromium or of a chromium-based alloy; a chromium-based diffusion layer (22) obtained by diffusion of chromium into the core (16) from the outer surface of the core(16); a succession of a chromium-based diffusion layer (22) obtained by diffusion of chromium into the core (16) from the outer surface of the core (16) and a chromium-based coating (20) consisting ofchromium or of a chromium-based alloy deposited on the outer surface of said core (16). 种用于轻水反应堆的燃料棒包壳(4)，包括：芯(16)，其包括由纯钼或由钼基合金组成的基体；和外保护层(18)，所述外保护层(18)选自：-沉积在所述芯(16)的外表面上的铬基涂布(20)，所述铬基涂布(20)包括由纯铬或由铬基合金组成的至少个铬基涂布层(24)；-通过将铬从