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2. 发明授权

US5491733A Nuclear fuel rod assembly apparatus 失效
标题翻译：核燃料棒组装装置
公开(公告)号：US5491733A
公开(公告)日：1996-02-13
申请号：US65727
申请日：1993-05-21
申请人： John F. Patterson , George C. Cooke , Jack Yates , Trond A. Bjornard
发明人： John F. Patterson , George C. Cooke , Jack Yates , Trond A. Bjornard
IPC分类号： G21C3/322 , G21C3/326 , G21C3/334 , G21C3/344
CPC分类号： G21C3/326 , G21C3/322 , G21Y2002/201 , G21Y2004/30 , G21Y2004/302 , Y02E30/38
摘要： The present invention provides a fuel rod for a light water nuclear reactors that comprises a part-length fuel rod and an extension tube having at least one wall member defining an enclosed flow path therethrough, the extension tube being coupled to a portion of the part-length fuel rod so as to be disposed axially above the part-length fuel rod, and including at least one inlet opening, for allowing fluid that surrounds the rod and initially comprises a two phase mixture of steam and liquid, to enter the enclosed fluid path and at least one outlet opening located above the inlet opening, the extension tube includes means for separating at least some of the steam located in the fluid from the liquid located therein. The improved fuel rod allows steam to bypass the upper active portions of the fuel assembly. A coolant diverter is positioned in a spacer of a nuclear fuel rod assembly in the large subchannel above a part length fuel rod for increasing the hydraulic resistance of the large subchannel and for separating liquid from two phase flow.
摘要翻译：本发明提供了一种用于轻水核反应堆的燃料棒，其包括部分长度的燃料棒和延伸管，该延伸管具有至少一个限定通过其的封闭流动通道的壁构件，该延伸管与部分 - 并且包括至少一个入口，用于允许围绕杆的流体并且最初包括蒸汽和液体的两相混合物，以进入封闭的流体路径以及位于入口开口上方的至少一个出口，所述延伸管包括用于将位于流体中的至少一些位于流体中的蒸汽与位于其中的液体分开的装置。改进的燃料棒允许蒸汽绕过燃料组件的上部有效部分。冷却剂分流器位于部分长度燃料棒上方的大的子通道中的核燃料棒组件的间隔件中，用于增加大的子通道的液压阻力并分离液体与两相流。

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