| 摘要 |
PROBLEM TO BE SOLVED: To provide a fuel cladding tube for a boiling water reactor and a method for manufacturing it which make it possible to maintain its better corrosion resistance and mechanical characteristics by specifying the range of ideal cladding thicknesses for catching up with higher burnups as an oxide film formed on the surface of the fuel cladding tube to make its hydrogen absorption suppressibilities better than ever. SOLUTION: In the fuel cladding tube for a boiling water reactor made of zircalloy, which is a fuel cladding tube for higher-burnup fuel assemblies whose average burnup is 45 GWd/t or higher; the oxide film whose thickness ranges between 0.05μm and 0.2μm inclusive is formed on the outer surface of the cladding tube. COPYRIGHT: (C)2008,JPO&INPIT
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