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公开(公告)号：US10818402B2
公开(公告)日：2020-10-27
申请号：US15475186
申请日：2017-03-31
Applicant: Westinghouse Electric Company LLC
Inventor： Joonhyung Choi , Zeses Karoutas , Paul M. Evans
Abstract: A spacer grid specifically designed for accident tolerant fuel utilizing fuel rods with SiC cladding for implementation in pressurized water reactors. The spacer grid has a generally square design that allows for ease of SiC fuel rod insertion during the fuel assembly fabrication process by providing a smooth contact geometry. The co-planar support allows the fuel rods to be rotated axially more freely at the grid location than a conventional six-point contact geometry used in existing fuel assembly designs.
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公开(公告)号：US10311982B2
公开(公告)日：2019-06-04
申请号：US15045892
申请日：2016-02-17
Applicant: WESTINGHOUSE ELECTRIC COMPANY LLC
Inventor： Lyman J. Petrosky
Abstract: A holding fixture for assisting in assembly of a support grid for nuclear fuel rods and including a plurality of straps each having a plurality of slots extending approximately half a height of the straps and tabs formed beside or between the slots. The holding fixture includes an actuation plate, a support plate having a plurality of receiving members structured to receive therein straps of the support grid and having a plurality of cells, and a plurality of cam assemblies structured to move to deflect every other tab of the straps received in the plurality of receiving members. The cam assemblies are disposed in every other cell of the support plate.
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公开(公告)号：US09378852B2
公开(公告)日：2016-06-28
申请号：US13746116
申请日：2013-01-21
Applicant: BWXT mPower, Inc.
Inventor： Lewis A Walton , George S Pabis , Andrew W Doan , James G Hatmaker
CPC classification number: G21C3/352 , G21C1/32 , G21C3/3563 , Y02E30/40
Abstract: A spacer grid includes intersecting straps defining cells with springs and dimples arranged to hold fuel rods passing through the cells. The direction of the springs switches at a switch point in the spacer grid that is not at the center of the spacer grid. The intersecting straps may include a first set of mutually parallel straps including a first transition strap and a second set of mutually parallel straps including a second transition strap, with the second set intersecting the first set. The springs of the first set of mutually parallel straps face away from the first transition strap, and the springs of the second set of mutually parallel straps face away from the second transition strap. The outer straps in some embodiments include dimples but not springs.
Abstract translation: 间隔网格包括限定具有弹簧的细胞的相交带，并且布置成保持通过细胞的燃料棒的凹坑。 弹簧的方向在不在间隔栅格中心的隔离栅格中的开关点处切换。 相交带可以包括第一组相互平行的带，包括第一过渡带和包括第二过渡带的第二组相互平行的带，第二组与第一组相交。 第一组相互平行的带的弹簧面向远离第一过渡带，并且第二组相互平行的带的弹簧面向远离第二过渡带。 在一些实施例中，外带包括凹坑，但不包括弹簧。
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公开(公告)号：US20140072091A1
公开(公告)日：2014-03-13
申请号：US13822567
申请日：2012-05-14
Applicant: Michael Liebler , Werner Meier
Inventor： Michael Liebler , Werner Meier
CPC classification number: G21C3/352 , G21C3/322 , G21C3/356 , G21C3/3563 , Y02E30/38
Abstract: The strip is of the type comprising a wall portion for delimiting a cell for receiving a fuel rod and allowing flow of a coolant upwardly through the spacer grid, a spring provided on the wall portion for biasing a fuel rod extending through the cell away from the wall portion, the spring being cut out in the strip and delimited by a slot and a motion limiter formed in the strip on the wall portion to limit motion of a fuel rod received in the cell towards the wall portion against action of the spring. According to one aspect of the invention, the motion limiter is located on an edge of the slot opposite the spring and defines a risen portion on the edge.
Abstract translation: 该条带是包括用于限定用于容纳燃料棒的电池单元的壁部分的类型，并允许冷却剂向上流动通过间隔栅格，弹簧设置在壁部分上，用于偏置延伸穿过电池的燃料棒远离 弹簧被切出并且由狭槽和运动限制器限定，该狭缝形成在壁部分上的条带中，以限制容纳在电池单元中的燃料棒抵抗弹簧的动作朝向壁部的运动。 根据本发明的一个方面，运动限制器位于与弹簧相对的槽的边缘上，并且限定了边缘上的上升部分。
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公开(公告)号：US20130272481A1
公开(公告)日：2013-10-17
申请号：US13447655
申请日：2012-04-16
Applicant: Julius M. Ullmann , Lewis A. Walton , Mary W. Johnson
Inventor： Julius M. Ullmann , Lewis A. Walton , Mary W. Johnson
CPC classification number: B25B23/0092 , F16B23/0015 , F16B39/025 , G21C3/3305 , G21C3/331 , G21C3/3315 , Y02E30/40
Abstract: A fuel assembly includes a plurality of fuel rods comprising fissile material, a plurality of guide tubes interspersed amongst the fuel rods, an upper end fitting connected with upper ends of guide tubes, and a lower end fitting. End plugs are connected with the lower ends of the guide tubes. The end plugs have threaded male shafts extending from the lower ends of the guide tubes which pass through openings of the lower end fitting. Female lock nuts are threaded onto the threaded male shafts of the end plugs and lock with the lower end fitting to secure the lower end fitting to the lower ends of the guide tubes. The female lock nuts suitably have locking portions that are outwardly deformed into recesses of the lower end fitting to lock the lock nuts in place after tightening. Dashpot tubes may be disposed in the lower ends of the guide tubes and connected to the end plugs.
Abstract translation: 燃料组件包括多个燃料棒，其包括裂变材料，多个引导管分散在燃料棒之间，上端配件与导管的上端连接，下端配件。 端塞与导管的下端连接。 端塞具有从引导管的下端延伸穿过下端配件的开口的螺纹阳轴。 母锁螺母拧入端塞的螺纹公轴上，并与下端配件锁定，以将下端配件固定在导管的下端。 母锁螺母适当地具有锁定部分，其向外变形成下端配件的凹部，以在紧固之后将锁定螺母锁定在适当位置。 缓冲器管可以设置在引导管的下端并连接到端塞。
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Patent Agency Ranking
6.发明申请公开(公告)号：US20120163526A1
公开(公告)日：2012-06-28
申请号：US12979970
申请日：2010-12-28
Applicant: Gregory Joseph Pearson , Atul A. Karve
Inventor： Gregory Joseph Pearson , Atul A. Karve
CPC classification number: G21C5/06 , G21C3/322 , G21C5/16 , G21C15/06 , G21C17/00 , G21D3/001 , G21D3/005 , Y02E30/38
Abstract: Fuel supports have specially configured flow paths useable in reactor cores to achieve desired levels of flow at given positions. Any number of differently-configured inlet orifices, from three to hundreds, are useable in a given core. Inlet orifice configuration may include diameter sizing or presence of flow blockages such as filters, venturis, choke plates, and/or obstructions. Fuel supports may be positioned within a core plate in the nuclear reactor, with openings for a control blade and instrumentation tubes to pass through or between the fuel supports. Different fuel support configurations may be used at outer core periphery, inner core periphery, and central core portions. Example methods configure fuel support characteristics by examining the effect of modifying flow loss coefficients at particular bundle locations and configuring associated inlet orifices to achieve the modified flow loss coefficients, if the effect is a positive one.
Abstract translation: 燃料支架具有可用于反应堆堆芯的特殊配置的流动路径，以达到给定位置所需的流量水平。 任何数量不同配置的入口孔，从三到数百，都可用于给定的核心。 入口孔口构造可以包括直径尺寸或存在流动阻塞物，例如过滤器，venturis，阻塞板和/或障碍物。 燃料支撑件可以位于核反应堆中的芯板内，具有用于控制叶片和仪表管通过或在燃料支架之间的开口。 不同的燃料支撑结构可以在外芯周边，内芯周边和中心芯部分使用。 示例性方法通过检查在特定束位置修改流量损失系数的效果来配置燃料支撑特性，并且如果效果是正的，则配置相关联的入口孔以实现修改的流动损失系数。
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公开(公告)号：US20110261921A1
公开(公告)日：2011-10-27
申请号：US11616121
申请日：2006-12-26
Applicant: Tomonari Koga , Satoshi Nishimura , Izumi Kinoshita , Shoichi Moriya , Yasushi Tsuboi , Mitsuo Wakamatsu , Yoshiaki Sakashita , Masatoshi Nakagawa
Inventor： Tomonari Koga , Satoshi Nishimura , Izumi Kinoshita , Shoichi Moriya , Yasushi Tsuboi , Mitsuo Wakamatsu , Yoshiaki Sakashita , Masatoshi Nakagawa
Abstract: A fuel assembly is charged in a reactor core of a nuclear reactor using a liquid metal as a coolant, and includes a wrapper tube storing a plurality of fuel pins and including an entrance nozzle for introducing the coolant and an operation handling head, grids disposed in the wrapper tube to support the fuel pins in the radial direction of the wrapper tube, liner tubes inserted in the wrapper tube to fixedly hold the respective grids in the axial direction of the wrapper tube, and a fixing device for fixing the grids and the liner tubes in the radial direction of the wrapper tube.
Abstract translation: 将燃料组件装入使用液态金属作为冷却剂的核反应堆的反应堆芯中，并且包括储存多个燃料销的包装管，并且包括用于引入冷却剂的入口喷嘴和操作处理头， 所述包装管在所述包装管的径向方向上支撑所述燃料销，所述衬管插入所述包装管中，以将所述各个栅格固定地保持在所述包装管的轴向方向上;以及固定装置，用于固定所述栅格和所述衬垫 管沿包装管的径向。
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公开(公告)号：US20110200160A1
公开(公告)日：2011-08-18
申请号：US12706166
申请日：2010-02-16
Applicant: Paul Marcus Evans , Richard P. Broders , Michael Anthony Marzean , Michael Winegardner , Adolfo Reparaz
Inventor： Paul Marcus Evans , Richard P. Broders , Michael Anthony Marzean , Michael Winegardner , Adolfo Reparaz
IPC: G21C3/356
Abstract: A nuclear fuel assembly grid having a vertical, elongated, split spring on each wall of the cells that support fuel rods to provide eight, co-planar, point contacts of support for the fuel rod.
Abstract translation: 一种核燃料组件网格，其在电池的每个壁上具有垂直的，细长的裂缝弹簧，其支撑燃料棒以提供用于燃料棒的支撑件的八个共面的点接触。
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9.发明授权Spacer grid with H-spring for fuel rods for use in nuclear reactor fuel assemblies 失效用于核反应堆燃料组件的用于燃料棒的H形弹簧的间隔栅格
公开(公告)号：US6167105A
公开(公告)日：2000-12-26
申请号：US208290
申请日：1998-12-08
Applicant: Kyung Ho Yoon , Heung Seok Kang , Hyung Kyu Kim , Kee Nam Song , Youn Ho Jung , Tae Hyun Chun , Dong Seok Oh , Wang Kee In
Inventor： Kyung Ho Yoon , Heung Seok Kang , Hyung Kyu Kim , Kee Nam Song , Youn Ho Jung , Tae Hyun Chun , Dong Seok Oh , Wang Kee In
CPC classification number: G21C3/352 , G21C3/3566 , G21Y2002/201 , G21Y2002/303 , G21Y2004/30 , Y02E30/40
Abstract: A spacer grid with H-springs for use in a nuclear reactor fuel assembly is disclosed. In the spacer grid, two sets of intersectional grid strips are arranged in sets at an angle to each other prior to being encircled by a plurality of perimeter strips, thus forming a plurality of four-walled cells individually placing and supporting an elongated fuel rod therein. A plurality of regularly spaced openings are formed on each of the grid strips and perimeter strips at portions corresponding to the cells. An H-shaped spring is set in each of the openings and has a specifically curved rib capable of being brought into conformal surface contact with a fuel rod placed in each of the cells. The H-shaped spring thus elastically supports the fuel rod. Two positioning dimples are provided on each of the strips at positions above and below each of the openings. The two positioning dimples are so specifically curved as to come into conformal surface contact with a fuel rod, thus elastically supporting the fuel rod in cooperation with the H-shaped springs.
Abstract translation: 公开了一种用于核反应堆燃料组件的具有H-弹簧的间隔栅格。 在间隔网格中，两组交叉格栅条在被多个周边条带包围之前彼此成角度地排成一组，从而形成多个四壁细胞，其中单独地将细长的燃料棒放置并支撑在其中 。 在与电池相对应的部分处，在每个栅格条和周边条上形成多个规则间隔的开口。 H形弹簧设置在每个开口中，并且具有能够与放置在每个电池中的燃料棒保持一致的表面接触的特定曲线的肋。 因此，H形弹簧弹性地支撑燃料棒。 在每个开口上方和下方的位置的每个条上设置两个定位凹坑。 两个定位凹坑被特别地弯曲成与燃料棒保持一致的表面接触，从而与H形弹簧协同地弹性地支撑燃料棒。
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公开(公告)号：US6144716A
公开(公告)日：2000-11-07
申请号：US887016
申请日：1997-07-02
Applicant: Quang M. Nguyen , Edmund E. DeMario
Inventor： Quang M. Nguyen , Edmund E. DeMario
CPC classification number: G21C3/3563 , Y02E30/40
Abstract: A support grid for laterally maintaining the relative position of elongated fuel elements within a fuel assembly for use within a core of a nuclear reactor. The grid is formed in the shape of a lattice with the intersecting lattice members defining a plurality of cells, most of which respectively support the nuclear fuel elements. The remaining cells support nuclear control rod guide tubes and instrumentation thimbles. The cells supporting the nuclear fuel elements are provided with diagonally positioned springs on two adjacent walls. The springs support the fuel elements against dimples which protrude from the opposite cell walls. The adjacent, diagonal springs in each fuel element cell are inclined in opposite directions. The springs are formed from narrow, parallel slits in the cell wall that terminate along a line parallel to the line of intersection with the adjacent wall. The spring slits continue along that parallel line in a direction away from the spring to increase its flexure. The lattice is formed in an "egg-crate" pattern with the orthogonal members fitting over opposing vertical slits in the adjoining straps. The vertical slits are extended more than half way over the width of the straps to further increase the flexure of the retaining springs.
Abstract translation: 用于横向维持细长燃料元件在燃料组件内的相对位置以用于核反应堆的核心内的支撑网格。 栅格形成为具有限定多个单元的相交晶格构件的格子形状，其中大部分单元分别支撑核燃料元件。 剩余的电池支持核控制杆导管和仪表套管。 支撑核燃料元件的电池在两个相邻的壁上设置有对角定位的弹簧。 弹簧将燃料元件抵靠从相对的细胞壁突出的凹坑。 每个燃料元件单元中相邻的对角弹簧在相反方向上倾斜。 弹簧由细胞壁中狭窄的平行狭缝形成，该狭缝平行于与相邻壁交叉的线路终止。 弹簧狭缝沿着平行线沿远离弹簧的方向延伸以增加其挠曲。 格子形成为“蛋箱”图案，正交构件配合在邻接带的相对的垂直狭缝上。 垂直狭缝在带的宽度上延伸超过一半，以进一步增加保持弹簧的挠曲。
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