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Fuel element for a pressurised water reactor and method for producing the cladding tubes thereof

机译:用于压水堆的燃料元件及其包壳管的制造方法

摘要

Fuel element has a laterally open structure made of control rod guide tubes to which distance spacers, fuel element head and a fuel element foot are fixed. Gas-tight cladding tubes (20) filled with fuel tablets are inserted into the open structure. At least several cladding tubes have a multi-layered wall having a mechanically stable matrix (21) made of a first strongly alloyed zirconium alloy in the middle with a thinner protective layer (22) of a lightly alloyed zirconium alloy metallurgically bonded to it. The protective layer is arranged on the inner side of the matrix facing the fuel tablets. An independent claim is also included for a process for the production of a cladding tube for a fuel rod.
机译:燃料元件具有由控制杆导管制成的侧向开口的结构,在其上固定有间隔垫片,燃料元件头和燃料元件脚。充满燃料片的气密包层管(20)插入到开放结构中。至少几个包层管具有多层壁,该多层壁在中间具有由第一强合金锆合金制成的机械稳定的基体(21),并且冶金学上结合有较薄的轻合金锆合金的保护层(22)。保护层布置在基体的面向燃料片的内侧上。还包括用于燃料棒的包层管的生产方法的独立权利要求。

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