公开(公告)号：WO2013172889A1

公开(公告)日：2013-11-21

申请号：PCT/US2013/026242

申请日：2013-02-15

Applicant: BABCOCK & WILCOX MPOWER, INC.

Inventor： LEE, Jeffrey, T. ,  PABIS, George, S. ,  RIDGEWAY, Roger, D.

IPC: G21C5/06

CPC classification number: G21C3/33 ,  G21C3/3206 ,  G21C3/3305 ,  Y02E30/40

Abstract: A fuel assembly including a plurality of fuel rods arranged mutually in parallel wherein the fuel rods include a fissile material, a plurality of guide tubes arranged in parallel with and interspersed amongst the fuel rods, an upper end fitting connected with upper ends of the guide tubes, and a lower end fitting connected with lower ends of the guide tubes. At least one of the upper end fitting and the lower end fitting includes a grid formed by interlocking metal strips secured together at intersections between the metal strips.

Abstract translation: 一种燃料组件，包括相互并联布置的多个燃料棒，其中所述燃料棒包括易裂变材料，多个导管与所述燃料棒平行布置并散布在所述燃料棒中;上端配件，其与所述导管的上端连接 以及与引导管的下端连接的下端配件。 上端配件和下端配件中的至少一个包括通过互锁的金属条形成的格栅，金属条固定在金属条之间的交叉处。

公开(公告)号：WO2013158711A1

公开(公告)日：2013-10-24

申请号：PCT/US2013/036888

申请日：2013-04-17

Applicant: BABCOCK & WILCOX MPOWER, INC.

Inventor： WALTON, Lewis, A. ,  PABIS, George, S. ,  ULLMANN, Julius, M. ,  RAAS, Jean, H. ,  GILLIAM, Martha, A. ,  AUSTIN, Anne, R. ,  BARRINGER, Eric, A.

IPC: G21C21/00 ,  G21D5/04

CPC classification number: G21C13/024 ,  G21C1/32 ,  G21C3/33 ,  G21C7/08 ,  G21C13/02 ,  Y02E30/32 ,  Y02E30/39

Abstract: A pressurized water reactor (PWR) comprises a pressure vessel containing primary coolant water. A nuclear reactor core is disposed in the pressure vessel and includes a plurality of fuel assemblies. Each fuel assembly includes a plurality of fuel rods containing a fissile material. A control system includes a plurality of control rod assemblies (CRA's). Each CRA is guided by a corresponding CRA guide structure. A support element is disposed above the CRA guide structures and supports the CRA guide structures. The pressure vessel may be cylindrical, and the support element may comprise a support plate having a circular periphery supported by the cylindrical pressure vessel. The CRA guide structures suitably hang downward from the support plate. The lower end of each CRA guide structure may include alignment features that engage corresponding alignment features of the upper end of the corresponding fuel assembly.

Abstract translation: 压水反应堆（PWR）包括一个包含一次冷却水的压力容器。 核反应堆核心设置在压力容器中并且包括多个燃料组件。 每个燃料组件包括多个含有易裂变材料的燃料棒。 控制系统包括多个控制杆组件（CRA）。 每个CRA由相应的CRA指导结构引导。 支撑元件设置在CRA引导结构上方并支撑CRA引导结构。 压力容器可以是圆柱形的，并且支撑元件可以包括具有由圆柱形压力容器支撑的圆形周边的支撑板。 CRA引导结构适当地从支撑板向下悬挂。 每个CRA引导结构的下端可以包括接合相应燃料组件的上端的对应对准特征的对准特征。

公开(公告)号：WO2013162669A2

公开(公告)日：2013-10-31

申请号：PCT/US2013/025055

申请日：2013-02-07

Applicant: BABCOCK & WILCOX MPOWER, INC.

Inventor： WALTON, Lewis, A. ,  PABIS, George, S. ,  DOAN, Andrew, W. ,  HATMAKER, James, G.

IPC: G21C3/34

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。

公开(公告)号：WO2013158708A1

公开(公告)日：2013-10-24

申请号：PCT/US2013/036882

申请日：2013-04-17

Applicant: BABCOCK & WILCOX MPOWER, INC.

Inventor： DOAN, Andrew, W. ,  WALTON, Lewis, A. ,  HATMAKER, James, G. ,  PABIS, George, S.

IPC: G21C3/34 ,  G21C3/336

CPC classification number: B23K26/242 ,  G21C3/334 ,  G21C3/34 ,  G21C21/00 ,  Y02E30/40

Abstract: A structural skeleton of a nuclear fuel assembly is assembled by inserting guide tubes through a plurality of spacer grids, and performing pulse arc welding to connect the inserted guide tubes and the spacer grids. In the structural skeleton, the spacer grids may comprise intersecting grid straps, and at least some of the grid straps may include tabs that are pulse arc welded to guide tubes. The structural skeleton may include grid retaining rings installed on the guide tubes and pinning some spacer grids, with the grid retaining rings being pulse arc welded to guide tubes. A fuel assembly includes the structural skeleton, a plurality of fuel rods comprising fissile material passing through the spacer grids, and upper and lower end fittings secured to upper and lower ends, respectively, of the guide tubes.

Abstract translation: 核燃料组件的结构骨架通过将引导管插入多个隔离栅格中进行组装，并进行脉冲电弧焊接以连接插入的导管和间隔栅格。 在结构骨架中，间隔栅格可以包括相交的网格带，并且网格带中的至少一些可以包括脉冲电弧焊接到引导管的突出部。 结构骨架可以包括安装在引导管上的栅格保持环，并固定一些间隔栅格，栅格保持环被脉冲电弧焊接到引导管。 燃料组件包括结构骨架，多个燃料棒，其包括通过间隔栅格的裂变材料，以及固定到导管的上端和下端的上端和下端配件。