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    • 1. 发明授权
    • Coolant flow mixer grid for a nuclear reactor fuel assembly
    • 用于核反应堆燃料组件的冷却剂流动混合器格栅
    • US4692302A
    • 1987-09-08
    • US567450
    • 1983-12-30
    • Edmund E. DeMarioRaymond F. BoylePeter J. Kuchirka
    • Edmund E. DeMarioRaymond F. BoylePeter J. Kuchirka
    • G21C3/322G21C3/34G21C3/356
    • G21C3/3563G21C3/322G21C2003/3432G21Y2002/201G21Y2002/303G21Y2004/30G21Y2004/302Y02E30/38
    • An improved grid structure is provided for a nuclear reactor fuel assembly whose sole purpose is to promote a crossflow mixing of the coolant through the fuel assembly rather than the support of the fuel rods. The grid straps form an egg-crate configuration creating cell openings for receiving the fuel rods. Associated with each cell opening is at least one coolant flow mixing vane that projects over the cell opening and four dimple protrusions which are open to the flow of coolant therethrough. The dimple protrusions extend into the cell opening to a further extent than the mixing vane so as to prevent damaging impact of the fuel rod with a vane upon transverse movement of the fuel rod across the cell opening. In reducing the pressure drop of the coolant flow through the assembly, the height of the inner grid straps is substantially less than the height of the outer border strap.
    • 为核反应堆燃料组件提供了改进的格栅结构,其单一目的是促进冷却剂通过燃料组件的交叉流混合,而不是燃料棒的支撑。 网格带形成蛋箱配置,创建用于接收燃料棒的电池开口。 与每个电池开口相关联的是至少一个冷却剂流动混合叶片,其突出在电池开口和四个凹部突出部分之间,这些突起部通过其中的冷却剂流动开放。 凹坑突起延伸到电池开口中比混合叶片更大程度地延伸,以便防止燃料棒在燃料棒穿过电池开口的横向运动时对叶片的燃料棒的冲击。 在减少通过组件的冷却剂流的压降中,内网格带的高度实质上小于外边界带的高度。