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    • 6. 发明专利
    • Spacers with deflection-limited peripheral springs for nuclear fuel assemblies and methods of making the same
    • 具有用于核燃料组件的偏转有限的外围弹簧的间隔件及其制造方法
    • JP2013200307A
    • 2013-10-03
    • JP2013057466
    • 2013-03-21
    • Global Nuclear Fuel Americas Llcグローバル・ニュークリア・フュエル・アメリカズ・エルエルシー
    • KATHRYN M MARTINSMITH DAVID GTHOMAS J RAMBACH
    • G21C3/34G21C21/00
    • G21C3/322G21C3/352G21C3/356Y02E30/38Y10T29/49826
    • PROBLEM TO BE SOLVED: To provide methods of making nuclear fuel assemblies, and fuel spacers for used in the fuel assemblies.SOLUTION: Fuel spacers include at least one specialized bathtub on an outer perimeter band. Specialized bathtubs include an elastic resistive extension and a corresponding deflection limiter on the same outer face of the perimeter band. The positioning, the spring constant, the length, the number, and other properties of the specialized bathtubs can be chosen based on the desired fuel assembly properties and expected transverse force in fuel shipping and operation, and the specialized bathtubs resiliently protect against the transverse force. The specialized bathtubs can be formed from a simplified stamp operation out of the perimeter band. The bathtubs can be placed on any position(s) on the perimeter band of example embodiment spacers used in nuclear fuel assemblies. The elastic resistive extension provides flexible resistance to a channel, and the deflection limiter provides rigid movement limitation beyond a particular threshold between the channel and the spacers.
    • 要解决的问题:提供制造核燃料组件的方法和用于燃料组件中的燃料间隔件。解决方案:燃料间隔件包括在外周带上的至少一个专门的浴缸。 专用浴缸在周边带的相同外表面上包括弹性电阻延伸部和相应的偏转限制器。 专门浴缸的定位,弹簧常数,长度,数量和其他性能可以根据燃油运输和运行中所需的燃料组装性能和预期的横向力来选择,而专门的浴缸弹性防止横向力 。 专门的浴缸可以从周边带的简化印章操作形成。 浴缸可以放置在核燃料组件中使用的示例性实施例间隔物的周边带上的任何位置上。 弹性阻力延伸提供对通道的柔性阻力,并且偏转限制器提供超出通道和间隔物之间​​特定阈值的刚性运动限制。
    • 7. 发明专利
    • Assembly jig and assembly method of fuel assembly
    • 燃油组件组装和组装方法
    • JP2012242144A
    • 2012-12-10
    • JP2011109975
    • 2011-05-17
    • Nuclear Fuel Ind Ltd原子燃料工業株式会社
    • NOHARA TATSURO
    • G21C21/00
    • PROBLEM TO BE SOLVED: To easily manufacture a fuel assembly that can suppress the generation of residual stress at a control rod guide thimble and has a high straightness with little torsion and inclination.SOLUTION: An assembly jig of a fuel assembly comprises: a holding rod having a flange part at the lower end side thereof; an inner tube formed in a cylindrical shape as insertable in a control rod guide thimble and externally fitted on the holding rod; rotation regulating means that regulates the rotation of the inner tube; elevating means that is formed at the upper end side of the inner tube and moves the holding rod in vertical directions relatively with respect to the inner tube; a holding rubber that is externally fitted on a part of the holding rod located higher than the flange part; an outer tube that has an engaging part for engaging an internal screw at the lower end side thereof and externally fitted on the inner tube; and fastening means that is formed at the upper end side of the outer tube and fastens the internal screw by operating the engaging part. In addition, an assembly method of the fuel assembly uses the assembly jig of the fuel assembly.
    • 要解决的问题:为了容易地制造能够抑制控制棒导向套管产生残余应力的燃料组件,并且具有很小的扭转和倾斜的高直线性。 解决方案:燃料组件的组装夹具包括:保持杆,其在其下端侧具有凸缘部分; 形成为可插入控制棒导向套筒中的外筒形状的内管,并且外嵌于保持杆上; 旋转调节装置,其调节内管的旋转; 升降装置,其形成在所述内管的上端侧,并且相对于所述内管在垂直方向上移动所述保持杆; 固定橡胶,其外部装配在位于高于所述凸缘部分的所述保持杆的一部分上; 外管,其具有用于与其内侧的内螺纹接合并嵌合在内管上的接合部; 以及紧固装置,其形成在外管的上端侧,并通过操作接合部来固定内螺纹。 此外,燃料组件的组装方法使用燃料组件的组装夹具。 版权所有(C)2013,JPO&INPIT