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    • 9. 发明申请
    • NUCLEAR CORE COMPONENT HOLD-DOWN ASSEMBLY
    • 核心组件保持组件
    • US20090323887A1
    • 2009-12-31
    • US12124195
    • 2008-05-21
    • Jin LIUYu Chung Lee
    • Jin LIUYu Chung Lee
    • G21C3/34
    • G21C3/331G21C3/3315G21C3/334G21Y2002/304G21Y2002/401G21Y2004/30Y02E30/40
    • A plate mounted fuel assembly hold-down system that provides a defined channel for both the insertion and removal of reactor head mounted, fixed in-core detector instrumentation, provides a guided path for the fixed in-core detector during insertion, and shields the instrument shroud against coolant cross flow. The hold-down assembly includes a base plate that seats on the adapter plate of the fuel assembly and has openings that align with the control rod guide thimbles. A hollow sleeve extends through and below a central opening in the base plate to mate with the fuel assembly instrument thimble. The sleeve extends above the base plate and through and above an upper core plate of the reactor. A hold-down bar is slidably mounted on the sleeve and is restrained below the top of the sleeve. A spring is positioned around the sleeve and is captured between the hold-down bar and the base plate.
    • 提供用于插入和拆卸反应器头安装的固定核心检测器仪表的限定通道的板式燃料组件压紧系统在插入期间为固定的核心检测器提供导向路径,并屏蔽仪器 防止冷却液横流。 压紧组件包括一个底板,该底座位于燃料组件的适配器板上并且具有与控制棒导向套管对准的开口。 中空套筒延伸穿过基板中的中心开口并在其下方与燃料组件仪表套管配合。 套筒在基板上延伸并且穿过反应器的上芯板并且上方。 压紧杆可滑动地安装在套筒上并且被限制在套筒的顶部之下。 弹簧定位在套筒周围,并被夹在压紧杆和底板之间。