公开(公告)号：US20050069080A1

公开(公告)日：2005-03-31

申请号：US10657025

申请日：2003-09-05

申请人： Mark Goldenfield ,  Quang Nguyen ,  Gregory Settle ,  Radu Pomirleanu ,  Abdelaziz Elmahdi ,  Lewis Walton ,  Raymond Brashier

发明人： Mark Goldenfield ,  Quang Nguyen ,  Gregory Settle ,  Radu Pomirleanu ,  Abdelaziz Elmahdi ,  Lewis Walton ,  Raymond Brashier

IPC分类号： G21C3/33 ,  G21C3/34 ,  G21C3/356 ,  G21C3/32

CPC分类号： G21C3/356 ,  G21Y2002/303 ,  G21Y2004/304 ,  Y02E30/40

摘要： A nuclear fuel assembly having a parallel array of elongated fuel elements supported between an upper and lower nozzle. Main support grids are substantially evenly spaced along the elongated dimension of the assembly to maintain the spacing between fuel elements. A plurality of auxiliary vibration-resistant grids respectively positioned between the main support grids in the middle third elongated dimension of the fuel elements, that are smaller in height and provide a larger fuel element contact area than the main support grids.

摘要翻译： 一种核燃料组件，其具有支撑在上部喷嘴和下部喷嘴之间的细长燃料元件的平行阵列。 主支撑栅格沿着组件的细长尺寸基本上均匀间隔，以保持燃料元件之间的间隔。 分别位于燃料元件的中间第三细长尺寸中的主支撑格栅之间的多个辅助防振网格，其高度较小并且提供比主支撑网格更大的燃料元件接触面积。

公开(公告)号：US20060227923A1

公开(公告)日：2006-10-12

申请号：US11102148

申请日：2005-04-08

申请人： Raymond Brashier ,  Lewis Walton

发明人： Raymond Brashier ,  Lewis Walton

IPC分类号： G21C15/00

CPC分类号： G21C3/322 ,  G21C3/14 ,  G21C3/32 ,  Y02E30/38

摘要： A top nozzle is for a fuel assembly of a nuclear reactor. The top nozzle includes a plate portion having a first plurality of apertures structured to receive guide thimbles of the fuel assembly and second and third pluralities of apertures which comprise first and second coolant holes structured to provide passage of a coolant fluid therethrough. The first and second coolant holes have different first and second cross-sectional shapes, respectively. The top nozzle and plate portion preferably comprise a single-piece casting in which numerous features, such as the first and second holes are as-cast, thus reducing production costs. The coolant holes preferably comprise a one-eighth-symmetric coolant hole pattern. The as-cast nature of the coolant holes permits the ligaments between coolant holes to be reduced in thickness, thereby increasing coolant flowthrough area and minimizing the pressure drop across the nozzle.

摘要翻译： 顶部喷嘴用于核反应堆的燃料组件。 顶部喷嘴包括板部分，其具有构造成接收燃料组件的引导套管的第一多个孔，以及包括构造成提供冷却剂流体通过的第一和第二冷却剂孔的第二和第三多个孔。 第一和第二冷却剂孔分别具有不同的第一和第二横截面形状。 顶部喷嘴和板部分优选地包括单件铸件，其中许多特征，例如第一和第二孔被铸造，从而降低生产成本。 冷却剂孔优选地包括八分之一对称的冷却剂孔图案。 冷却剂孔的铸造性质允许冷却剂孔之间的韧性减小，从而增加冷却剂流过面积并使喷嘴两端的压降最小化。