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发明公开
CN102136302A 具有固定稳定性改良的弹簧插孔的核燃料组件顶喷嘴及其制造方法 无效 - 驳回 复审申请

具有固定稳定性改良的弹簧插孔的核燃料组件顶喷嘴及其制造方法
摘要：
这里公开了一种核燃料组件的顶喷嘴以及制造该顶喷嘴的方法。该顶喷嘴包括连接板、围墙和压紧弹簧单元。所述连接板连接于核燃料组件的导向套管。所述围墙从所述连接板的周边向上伸出。弹簧夹具设置于所述围墙的上表面上。压紧弹簧单元以将所述压紧弹簧单元的相应端部连接到所述弹簧夹具的方式安装于所述围墙的上表面。贯穿所述弹簧夹具的上表面而垂直地形成固定销孔。沿所述压紧弹簧的插入方向通过放电加工形成所述压紧弹簧单元插入其中的弹簧插孔。
摘要（英）：

A top nozzle for a nuclear fuel assembly and a method of manufacturing the top nozzle are provided. The top nozzle can include a coupling plate, a perimeter wall and a hold-down spring unit. The coupling plate can be coupled to a guide thimble of the nuclear fuel assembly. The perimeter wall can protrude upwards from the perimeter of the coupling plate. A spring clamp can be provided on the upper surface of the perimeter wall. The hold-down spring unit can be mounted to the upper surface of the perimeter wall in such a way to couple a corresponding end of the hold-down spring unit to the spring clamp. A fastening pin hole can be vertically formed through an upper surface of the spring clamp. A spring insert hole into which the hold-down spring unit can be inserted and formed by electro-discharge machining in an insert direction of the hold-down spring.

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