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    • 10. 发明授权
    • Fuel assembly for PWR nuclear reactor
    • PWR核反应堆燃料组件
    • US08406369B2
    • 2013-03-26
    • US12063348
    • 2007-02-15
    • Hideyuki SakataYasunao YamaguchiJun ShimizuShigeyuki Watanabe
    • Hideyuki SakataYasunao YamaguchiJun ShimizuShigeyuki Watanabe
    • G21C1/04
    • G21C3/322G21C3/3315G21Y2002/303G21Y2004/302Y02E30/32Y02E30/38
    • Provided is a fuel assembly 1 for a PWR nuclear reactor capable of stably creating transverse flows of coolant for pressing and securing control rods so as to restrain vibration of the control rods in order to restrain the outer surfaces of the control rods and the inner surfaces of control rod guide tubes from being worn, wherein an upper nozzle arranged above the fuel assembly comprises an adapter plate 6 constituting the lower structure of the upper nozzle, a side wall extended along the periphery of the adapter plate, an overhang projected into a space above the adapter plate from the upper part of the side wall, and apertures for attaching control guide tubes and passage holes, which are formed in the passage surface of the adapter plate, and wherein those 15A, 15B, 15C of the passage holes which are located at positions where the coolant impinges upon the overhang are generally arranged, line-symmetric with respect to diagonal lines of the passage surface serving as symmetric axes Q, and ligaments 21, 23 around the passage holes located inside and outside of those 11a of the attaching apertures which are located on the outer peripheral side are set to be larger than ligaments 22 around the passage holes which are located on opposite transverse sides of those of the attaching apertures.
    • 提供一种用于PWR核反应堆的燃料组件1,其能够稳定地产生用于按压和固定控制棒的冷却剂的横向流动,以便抑制控制棒的振动,以便限制控制棒和内表面的外表面 控制杆引导管不被磨损,其中布置在燃料组件上方的上喷嘴包括构成上喷嘴下部结构的适配器板6,沿适配器板的周边延伸的侧壁,突出到上方的空间中的突出部 来自侧壁的上部的适配器板,以及形成在适配器板的通道表面中的用于附接控制引导管和通孔的孔,并且其中位于所述通孔的那些15A,15B,15C 在冷却剂冲击突出部位的位置通常布置成相对于用作对称轴的通道表面的对角线线对称 并且位于外周侧的安装孔的那些11a的内侧和外侧的通道孔周围的韧带21,23被设定为大于位于相对横向侧的通孔周围的韧带22 的连接孔的那些。