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    • 2. 发明授权
    • Nuclear fuel assembly
    • 核燃料组件
    • US06229868B1
    • 2001-05-08
    • US09202689
    • 1999-02-10
    • Olov NylundThorbjörn Sahlin
    • Olov NylundThorbjörn Sahlin
    • G21C300
    • G21C3/3315G21C3/322G21C3/3305G21Y2002/20G21Y2004/302G21Y2004/402Y02E30/38
    • The present invention relates to a fuel assembly for a light-water nuclear reactor with a substantially square cross section which comprises fuel rods (4) extending between a bottom tie plate (16) and a top tie plate (17). A coolant is adapted, during operation, to flow upwards through the fuel assembly. According to one aspect of the invention, the fuel assembly comprises a plurality of fuel units (3) stacked on top of each other, wherein each fuel unit (3) comprises a plurality of fuel rods (4) extending between a top tie plate (17) and a bottom tie plate (16). The fuel units are arranged attached to a support structure (4a, 14, 14a, 14b) extending through the whole fuel assembly such that axial gaps are formed between the fuel units (3). One of the tie plates is freely movable relative to the support structure.
    • 本发明涉及一种具有基本正方形横截面的轻水核反应堆燃料组件,其包括在底板(16)和顶板(17)之间延伸的燃料棒(4)。 在操作期间,冷却剂适于向上流过燃料组件。 根据本发明的一个方面,燃料组件包括堆叠在彼此顶部的多个燃料单元(3),其中每个燃料单元(3)包括多个燃料棒(4),其在顶部连接板 17)和底板(16)。 燃料单元被布置成附接到延伸穿过整个燃料组件的支撑结构(4a,14,14a,14b),使得在燃料单元(3)之间形成轴向间隙。 一个连接板相对于支撑结构可自由移动。