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    • 6. 发明授权
    • Nuclear fuel assembly support grid
    • 核燃料组件支撑电网
    • US5859887A
    • 1999-01-12
    • US879538
    • 1997-06-20
    • James B. Richards
    • James B. Richards
    • G21C3/352G21C3/34
    • G21C3/352G21Y2002/206G21Y2002/303G21Y2004/301Y02E30/40
    • A nuclear fuel assembly support grid formed from a lattice structure having an egg-crate design with the interior lattice straps joined to a perimeter strap generally at least three locations along its length; with at least two of those locations being affixed by shear joints. The shear joints are formed from weld tabs extending from the ends of the interior lattice straps, at appropriate locations, which fit into corresponding slots in the perimeter strap. The weld tabs are then brazed or welded, as appropriate to the base metals being joined, after being inserted. The weld segments can be designed with twist tabs at their end, that can be deformed after being inserted into the corresponding slots in the peripheral strap, to hold the fixture in place while it is being bonded. In another embodiment, the interior lattice straps are joined to the perimeter strap by two shear joints formed respectively at the very top and bottom of the interface.
    • 由具有卵盒设计的格子结构形成的核燃料组件支撑格栅,内部格子带通常沿着其长度连接至周边带至少三个位置; 其中至少两个位置由剪切接头固定。 剪切接头由在内部格子带的端部延伸的焊接片形成,该适配位置适合于周边带中相应的槽。 然后在插入之后,焊接接头被钎焊或焊接,适合于被接合的基底金属。 焊接部分可以在其端部设计有扭曲突出部,其可以在插入到周边带中的相应狭槽中之后变形,以将固定装置固定在其上。 在另一个实施例中,内部格子带通过分别形成在界面的最上面和底部的两个剪切接头连接到周边带上。