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    • 2. 发明授权
    • Spacer grid for nuclear reactor fuel assemblies with grid springs maintaining conformal contact with fuel rods and enlarged elastic range
    • 具有栅格弹簧的核反应堆燃料组件的间隔栅格保持与燃料棒的保形接触和扩大的弹性范围
    • US06707872B2
    • 2004-03-16
    • US10010526
    • 2001-12-07
    • Kyung Ho YoonHeung Seok KangHyung Kyu KimKee Nam SongYoun Ho JungTae Hyun ChunDong Seok OhWang Kee InGyung Jin Park
    • Kyung Ho YoonHeung Seok KangHyung Kyu KimKee Nam SongYoun Ho JungTae Hyun ChunDong Seok OhWang Kee InGyung Jin Park
    • G21C334
    • G21C3/3563G21Y2002/303G21Y2004/301Y02E30/40
    • A spacer grid used for placing and supporting fuel rods in nuclear reactor fuel assemblies is disclosed. The spacer grid of this invention has a plurality of grid springs designed to have an optimal shape of their vertical support parts, thus reducing fretting wear of the fuel rods caused by contact of the fuel rods with the grid springs. The grid spring has a vertical support part and a fuel rod support part. The vertical support part includes upper and lower base parts extending downward and upward from the central portions of the top and bottom edges of an opening formed at the central portion of a unit strip, and two bridge parts branched from the upper base part and extending symmetrically downward until they are united at the lower base part. The fuel rod support part includes a conformal support part brought into surface contact with the external surface of a fuel rod. Two transverse connection parts extend outward from the opposite outside edges of the conformal support part while being specifically bent, and are integrated with the central portions of the inside edges of the two bridge parts into a single structure, thus connecting the fuel rod support part to the vertical support part.
    • 公开了一种用于将燃料棒放置和支撑在核反应堆燃料组件中的间隔栅格。 本发明的间隔栅格具有多个格栅弹簧,其被设计成具有其垂直支撑部分的最佳形状,从而减少由燃料棒与格栅弹簧的接触引起的燃料棒的微动磨损。 栅格弹簧具有垂直支撑部分和燃料棒支撑部分。 垂直支撑部分包括从形成在单元条的中心部分的开口的顶部和底部边缘的中心部分向下和向上延伸的上部和下部基部,以及从上部基部分支并且对称延伸的两个桥接部分 向下,直到它们结合在下基部。 燃料棒支撑部分包括与燃料棒的外表面接触的共形支撑部分。 两个横向连接部分从保形支撑部分的相对的外边缘向外延伸,同时被特别弯曲,并且与两个桥接部分的内边缘的中心部分成一体,从而将燃料棒支撑部分连接到 垂直支撑部分。
    • 4. 发明授权
    • Side-slotted nozzle type double sheet spacer grid for nuclear fuel assemblies
    • 用于核燃料组件的侧开口喷嘴型双板间隔栅格
    • US06744843B2
    • 2004-06-01
    • US10452030
    • 2003-05-30
    • Heung Seok KangKyung Ho YoonHyung Kyu KimKee Nam SongYeon Ho JungTae Hyun ChunDong Seok OhWang Kee In
    • Heung Seok KangKyung Ho YoonHyung Kyu KimKee Nam SongYeon Ho JungTae Hyun ChunDong Seok OhWang Kee In
    • G21C334
    • G21C3/3566G21Y2002/303G21Y2004/30Y02E30/40
    • A side-slotted nozzle type double sheet spacer grid for nuclear fuel assemblies is disclosed. The spacer grid includes intersecting inner strips and four perimeter strips. Each inner strip has unit strip parts, each fabricated by integrating two unit sheet parts together into a single structure, such that the two unit sheet parts face each other and a nozzle type coolant channel is defined between the two unit sheet parts. Each perimeter strip is fabricated by integrating an inner thin sheet having the unit sheet parts with a flat outer thin sheet having a width corresponding to the width of the inner thin sheet into a single structure. The coolant channel has one or more outlets formed by cutting an upper portion of one of the two unit sheet parts of each unit strip part. Each unit sheet part has a slot longitudinally formed on each side surface of a spring that is projected from the unit sheet part to support a fuel rod within a four-walled cell. The spacer grid thus effectively deflects and mixes coolants together to improve the heat transfer effect between fuel rods and coolants, and enhances its strength to effectively resist laterally directed forces acting thereon, and remarkably improves spring performance of its fuel rod support parts, thus accomplishing desired soundness of the fuel assemblies.
    • 公开了一种用于核燃料组件的侧槽式喷嘴型双层间隔栅格。 间隔网格包括相交的内条和四条周边条。 每个内条具有单元条部分,每个单元条部分通过将两个单元片部分集成在一起成为单个结构而制成,使得两个单元片部分彼此面对,并且在两个单位片部分之间限定喷嘴型冷却剂通道。 每个周边条通过将具有单位片部分的内部薄片与具有对应于内部薄片的宽度的宽度的平坦外部薄片整合成单一结构来制造。 冷却剂通道具有通过切割每个单位条部分的两个单位片部分之一的上部而形成的一个或多个出口。 每个单位片部分具有纵向形成在弹簧的每个侧表面上的槽,该弹簧从单元片部分突出以将燃料棒支撑在四壁电池内。 因此间隔网格因此有效地将冷却剂偏转并混合在一起以改善燃料棒和冷却剂之间的传热效果,并且增强其强度以有效地抵抗作用在其上的横向定向力,并且显着地改善其燃料棒支撑部件的弹簧性能,从而实现期望的 燃料组件的健全性。