公开(公告)号：US5339341A

公开(公告)日：1994-08-16

申请号：US123419

申请日：1993-09-17

申请人： Raymond A. King ,  David A. Farnsworth ,  Jerome S. D'Orio

发明人： Raymond A. King ,  David A. Farnsworth ,  Jerome S. D'Orio

IPC分类号： G21C3/322 ,  G21C3/34

CPC分类号： G21C3/34 ,  G21C3/322 ,  G21Y2002/201 ,  G21Y2004/302 ,  Y02E30/38

摘要： A mixer grid for a nuclear reactor fuel assembly has a plurality of strips arranged in interlocking rows and columns defining a plurality of cells. A stopper is fixed to each corner of each cell for both directing coolant flow, providing coolant mixing and providing a smooth contact surface for the fuel rod. The stopper is either cone-shaped or cylindrical for directing and channeling coolant flow. The stopper also has a smooth, flat chamfered surface for contacting the fuel rod and minimizing damage upon the shifting of the fuel rod. The grid is attached to the nuclear reactor fuel assembly by using guide cells comprising a plurality of support arches for welding to the nuclear reactor fuel assembly.

摘要翻译： 用于核反应堆燃料组件的混合器栅格具有多个条，其以限定多个单元的互锁行和列布置。 一个止动器被固定到每个电池的每个角落，用于引导冷却剂流动，提供冷却剂混合并为燃料棒提供光滑的接触表面。 止动器是圆锥形或圆柱形，用于引导和引导冷却剂流。 止动器还具有平滑的平坦的倒角表面，用于接触燃料棒并且最小化燃料棒移动时的损坏。 通过使用包括用于焊接到核反应堆燃料组件的多个支撑拱的引导单元将格栅连接到核反应堆燃料组件。

公开(公告)号：US5135707A

公开(公告)日：1992-08-04

申请号：US577179

申请日：1990-09-04

申请人： Thomas J. Smentek

发明人： Thomas J. Smentek

IPC分类号： G21C3/334

CPC分类号： G21C3/334 ,  Y02E30/40

摘要： A fuel rod alignment template and method for loading fuel rods in a nuclear fuel assembly. Front and rear guide plates are provided with a plurality of holes corresponding to cells in the fuel assembly to be loaded. The guide plates are rigidly connected together by connecting rods that extend beyond the front guide plate and are sized to be received in the guide tubes of the fuel assembly. When attached to the fuel assembly with the front guide plate abutting the guide tubes the holes in the guide plates and cells in the grid assemblies of the fuel assembly are in coaxial alignment. This provides positive guidance to the fuel rods as they are inserted into the fuel assembly to prevent mis-tracking and damage to the fuel assembly.

摘要翻译： 燃料棒对准模板和用于将燃料棒装载在核燃料组件中的方法。 前导向板和后引导板设置有与要加载的燃料组件中的单元相对应的多个孔。 引导板通过延伸超过前引导板的连杆刚性地连接在一起，并且其尺寸被设计成容纳在燃料组件的引导管中。 当附接到燃料组件时，前引导板邻接引导管，引导板中的孔和燃料组件的电网组件中的孔同轴对准。 这为燃料棒插入燃料组件中提供了积极的指导，以防止错误跟踪和损坏燃料组件。

公开(公告)号：US5094802A

公开(公告)日：1992-03-10

申请号：US535256

申请日：1990-06-08

申请人： John E. Riordan, III

发明人： John E. Riordan, III

IPC分类号： G21C3/32 ,  G21C19/307

CPC分类号： G21C3/3206 ,  G21C3/32 ,  G21C19/307 ,  G21Y2002/201 ,  G21Y2004/30 ,  Y02E30/40

摘要： A nuclear fuel assembly with a debris filter. The lower end fitting of the fuel assembly has a stamped plate attached thereto that serves as a debris filter immediately upstream of the fuel rods. The stamped plate is provided with a plurality of flow holes in a size and pattern that provides filtration of debris damaging to the fuel rods while maintaining adequate coolant flow through the fuel assembly.

摘要翻译： 具有碎片过滤器的核燃料组件。 燃料组件的下端配件具有附接到其上的冲压板，其在燃料棒的上游作为碎屑过滤器。 冲压板设置有多个尺寸和图案的流动孔，其提供过滤碎屑损坏燃料棒，同时保持足够的冷却剂流过燃料组件。

公开(公告)号：US5526388A

公开(公告)日：1996-06-11

申请号：US368572

申请日：1995-01-04

申请人： Douglas J. Attix

发明人： Douglas J. Attix

IPC分类号： G21C3/328 ,  G21C3/34

CPC分类号： G21C3/328 ,  G21Y2002/303 ,  G21Y2004/303 ,  Y02E30/38

摘要： A debris resistant fuel rod sleeve that is received over the lower end of a fuel rod. The sleeve extends above the top of the lowermost spacer grid. Openings are spaced apart around the circumference of the sleeve to correspond to the location of hard stops in the spacer grid. The hard stops are received in the openings and retain the sleeves in position during operation and during reconstitution or recaging if necessary. The outboard side of the peripheral sleeves may be provided with top and bottom lead-in features to prevent hang-ups.

摘要翻译： 一个容纳在燃料棒下端的防碎片燃料棒套筒。 套筒延伸到最下层间隔栅格顶部的上方。 开口围绕套筒的圆周间隔开以对应于间隔网格中的硬止动件的位置。 坚固的止动件被容纳在开口中，并且在操作期间和必要时在重新配置或重新装配时将套筒保持在适当的位置。 外围套管的外侧可以设置有顶部和底部引入部件，以防止挂起。

公开(公告)号：US5461647A

公开(公告)日：1995-10-24

申请号：US298813

申请日：1994-08-31

申请人： Darel R. Clark ,  D. Michael Minor

发明人： Darel R. Clark ,  D. Michael Minor

IPC分类号： G21C3/334 ,  G21C19/00

CPC分类号： G21C3/334 ,  G21Y2002/302 ,  G21Y2002/40 ,  G21Y2004/501 ,  Y02E30/40

摘要： A tool for use with an integral reusable locking arrangement between the guide tubes and upper end fitting in a nuclear fuel assembly. A positioner on the tool locates the tool on the upper end fitting grillage and aligns a wrench on the tool with projections on a spring collar used in the locking arrangement. The wrench on the lower end of the tool has slots that engage with the reusable locking arrangement on the guide tube upon application of downward pressure on the tool driver. Rotation of the driver causes corresponding rotation of the spring collar on the reusable locking arrangement for locking or unlocking of the upper end fitting in place relative to the guide tubes. Axial and rotational motion of the driver is limited by interaction between a set screw on the positioner and slots in the driver. Upward motion of the driver disengages the wrench from the spring collar for removal of the tool.

摘要翻译： 一种用于引导管和核燃料组件中的上端配件之间的整体可重复使用的锁定装置的工具。 工具上的定位器将工具定位在上端配件格架上，并将工具上的扳手与在锁定装置中使用的弹簧环上的突起对准。 工具下端的扳手具有槽，其在施加工具驱动器上的向下压力时与导向管上的可重复使用的锁定装置接合。 驾驶员的旋转导致弹簧套环在可重复使用的锁定装置上的相应旋转，以将上端配件相对于导管锁定或解锁到适当位置。 驱动器的轴向和旋转运动受定位器上的固定螺钉和驱动器中的槽之间的相互作用的限制。 驱动器的向上运动使扳手从弹簧圈脱离，以移除工具。

公开(公告)号：US5272742A

公开(公告)日：1993-12-21

申请号：US915573

申请日：1992-07-20

申请人： Douglas J. Attix ,  Samuel V. Pickerel, Jr. ,  John E. Riordan, III

发明人： Douglas J. Attix ,  Samuel V. Pickerel, Jr. ,  John E. Riordan, III

IPC分类号： G21C3/12 ,  G21C3/32

CPC分类号： G21C3/12 ,  G21C3/32 ,  G21Y2002/302 ,  G21Y2004/301 ,  Y02E30/40

摘要： An upper end fitting for a nuclear fuel assembly. A main body portion that is square in section has a base rigidly attached thereto. A combined pedestal and holddown spring assembly received in the main body portion is formed from leaf springs attached together by a bolt and nut. The leaf springs are bolted together such that the exterior radius or convex surface of the springs face each other. The bolt and nut are sized and shaped to serve as the pedestal for the control assembly of the reactor. A spring retainer movably received in the main body portion retains the springs inside the main body portion. The retainer is also provided with a bore therethrough sized to allow the bolt/pedestal to extend therethrough.

摘要翻译： 用于核燃料组件的上端配件。 截面为正方形的主体部分具有刚性地附接到其上的基部。 容纳在主体部分中的组合基座和按压弹簧组件由通过螺栓和螺母附接在一起的板簧形成。 板簧被螺栓连接在一起，使得弹簧的外部半径或凸形表面彼此面对。 螺栓和螺母的尺寸和形状被设计成用作反应器的控制组件的基座。 可移动地容纳在主体部分中的弹簧保持器将弹簧保持在主体部分内部。 保持器还设置有穿过其中的孔，其尺寸允许螺栓/基座延伸穿过其中。

公开(公告)号：US5124116A

公开(公告)日：1992-06-23

申请号：US726094

申请日：1991-07-05

申请人： Jeffrey S. Whitt

发明人： Jeffrey S. Whitt

IPC分类号： G21C3/334

CPC分类号： G21C3/334 ,  G21Y2002/302 ,  G21Y2004/501 ,  Y02E30/40

摘要： A grid key and method for keying exterior grid cells in a nuclear fuel assembly. The grid key has a main body portion having first and second ends and is bent at approximately a 45 degree angle near the first end. Two tabs extend outward from the first end at a right angle to the main body portion to define a T-shape. The T-shaped end is inserted into the window of the exterior grid strip such that the top of the T-shape is parallel to the longitudinal axis of the grid assembly. The main body portion is then rotated 90 degrees to position the top of the T-shaped end to be perpendicular to the longitudinal axis of the grid assembly and behind the exterior grid strip. The main body portion is then pulled away from the exterior grid strip in a vertical rotating motion, causing the top of the T-shaped end to pull the exterior grid strip away from the center of the cell defined by the grid assembly.

摘要翻译： 用于键合核燃料组件中的外部网格单元的网格键和方法。 格栅具有具有第一端和第二端的主体部分，并且在第一端附近以大致45度的角度弯曲。 两个突片从第一端向外延伸，与主体部分成直角，以限定T形。 T形端部插入外部栅格条的窗口中，使得T形的顶部平行于栅格组件的纵向轴线。 然后将主体部分旋转90度以将T形端部的顶部定位成垂直于栅格组件的纵向轴线并且在外部栅格条带的后面。 然后主体部分以垂直旋转运动从外部格栅条拉开，导致T形端部的顶部将外部格栅条拉离远离网格组件限定的单元格的中心。

公开(公告)号：US5490189A

公开(公告)日：1996-02-06

申请号：US310555

申请日：1994-09-22

申请人： Christopher B. Schechter

发明人： Christopher B. Schechter

IPC分类号： G21C3/32 ,  G21C19/42

CPC分类号： G21C3/3206 ,  G21Y2002/101 ,  G21Y2002/201 ,  G21Y2004/304 ,  Y02E30/40

摘要： A nuclear fuel assembly debris filter. Each fuel rod has a ring attached to the lower end cap. The rings are shaped and sized to define a space between the lower end cap and ring such that the space serves to trap, or filter, debris before it reaches the elevation of the fuel cladding. The rings may be circular, elliptical, or any suitable shape that provides the desired filtration effect.

摘要翻译： 一个核燃料组件碎片过滤器。 每个燃料棒具有附接到下端盖的环。 这些环的形状和尺寸被设计成在下端盖和环之间限定一个空间，使得该空间用于在其到达燃料包层的高度之前捕获或过滤碎屑。 环可以是圆形，椭圆形或提供所需过滤效果的任何合适的形状。

公开(公告)号：US5406599A

公开(公告)日：1995-04-11

申请号：US225038

申请日：1994-04-08

申请人： Garrett Johnson, Jr. ,  Raymond A. King ,  Elbert C. Minnick, III

发明人： Garrett Johnson, Jr. ,  Raymond A. King ,  Elbert C. Minnick, III

IPC分类号： G21C3/34 ,  G21C21/00

CPC分类号： G21C3/3424 ,  G21Y2002/302 ,  G21Y2004/40 ,  G21Y2004/501 ,  Y02E30/40 ,  Y10T29/531

摘要： A weld fixture for receiving and aligning the fuel rod contact points of a nuclear fuel bundle spacer grid. Two plates are provided with intersecting unequally spaced slots that define polygons on one side of each plate. Both plates have bores therethrough substantially at the slot intersections and in the slots adjacent the outer edges of the plates. Bores are provided through both plates in polygons that correspond to fuel assembly guide tube and instrument tube locations. These positions receive guide cell pins during use, some of which are hollow and are used to bolt the plates together over the spacer grid strips. Bores in each plate through the defined polygons receive alignment pins. Guide rods receive and align the plates through corner bores in each plate. The slots and pins in the facing plates align the critical fuel rod contact points in the spacer grid during the intersection welding process.

摘要翻译： 用于接收和对准核燃料束隔离栅格的燃料棒接触点的焊接夹具。 两个板设置有相互不等间隔的槽，其在每个板的一侧上限定多边形。 两个板都具有穿过其中的孔，其基本上在槽交叉点处和与板的外边缘相邻的槽中。 通过对应于燃料组件引导管和仪器管位置的多边形中的两个板提供孔。 这些位置在使用期间接收引导单元销，其中一些是中空的，并且用于将板螺栓连接在间隔网格条上。 每个板中的孔通过定义的多边形接收对准引脚。 导杆通过每个板中的角孔接收和对准板。 面对板中的槽和销在交叉焊接过程中对准间隔栅格中的关键燃料棒接触点。

公开(公告)号：US5361287A

公开(公告)日：1994-11-01

申请号：US219679

申请日：1994-03-29

申请人： Rick D. Williamson

发明人： Rick D. Williamson

IPC分类号： G21C3/32 ,  G21C15/06 ,  G21C19/30

CPC分类号： G21C3/3206 ,  G21Y2002/201 ,  G21Y2004/30 ,  Y02E30/40

摘要： A nuclear fuel assembly lower end fitting. Two plates each having a network of diagonal and lateral ribs in conjunction with hubs for the guide thimble hole pattern are provided. The pitch between ribs corresponds to one-half of the fuel rod pitch. This allows for the fuel rods to be supported by every other rib. One plate is rotated horizontally ninety degrees relative to the other plate so that the lateral ribs of the plates are at right angles. A screen formed from approximately 0.03 inch diameter wire with 0.100 inch pitch is provided with guide tube bosses. The plates and screen are rigidly attached to each other to form a debris filtering lower end fitting.

摘要翻译： 核燃料组件下端配件。 提供两个板，每个板具有与导向套管孔图案的轮毂一起的对角线和横向肋的网络。 肋之间的间距对应于燃料棒间距的一半。 这允许燃料棒由每隔一个的肋支撑。 一个板相对于另一个板水平旋转90度，使得板的侧向肋成直角。 由具有0.100英寸间距的大约0.03英寸直径的线形成的屏幕设置有导管凸台。 板和屏幕彼此刚性地连接以形成碎片过滤下端配件。