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1. 发明授权

US06621885B2 Apparatus and a method for assembling a spacer grid of a fuel assembly for a nuclear reactor 失效
标题翻译：用于组装用于核反应堆的燃料组件的间隔栅格的装置和方法
公开(公告)号：US06621885B2
公开(公告)日：2003-09-16
申请号：US10149619
申请日：2002-06-12
申请人： Christophe Brichet
发明人： Christophe Brichet
IPC分类号： G21C3352
CPC分类号： G21C3/3424 , G21Y2002/202 , G21Y2002/205 , G21Y2002/302 , G21Y2002/303 , G21Y2002/304 , G21Y2004/40 , G21Y2004/501 , Y02E30/40 , Y10T29/49902
摘要： The assembly apparatus comprises a frame for supporting the straps of the first set of straps in mutually parallel positions, clamping and engagement for clamping on each of the straps of a second set of straps in succession and for engaging them with the straps of the first set in position in the support frame, and at least one comb that is movable between a disengaged position and a position in which it engages each of the straps of the first set.
摘要翻译：组装装置包括用于在相互平行的位置支撑第一组皮带的带的框架，用于相继夹紧第二组皮带的每个带的夹紧和接合装置，并且用于将它们与第一组带的绑带设置在支撑框架中的适当位置，以及至少一个梳子，其可在分离位置与其与第一组的每个带束接合的位置之间移动。

2. 发明授权

US06650723B1 Double strip mixing grid for nuclear reactor fuel assemblies 失效
标题翻译：双层混合格栅用于核反应堆燃料组件
公开(公告)号：US06650723B1
公开(公告)日：2003-11-18
申请号：US09862383
申请日：2001-05-22
申请人： Heungseok Kang , Keenam Song , Kyungho Yoon , Hyungkyu Kim , Taehyun Chun , Dongseok Oh , Wangkee In , Yeonho Jung
发明人： Heungseok Kang , Keenam Song , Kyungho Yoon , Hyungkyu Kim , Taehyun Chun , Dongseok Oh , Wangkee In , Yeonho Jung
IPC分类号： G21C3352
CPC分类号： G21C3/352 , Y02E30/40
摘要： A double strip mixing grid for nuclear reactor fuel assemblies is disclosed. This grid is fabricated by intersecting at right angles a plurality of double strips, each fabricated by welding two thin sheets together into a single structure with coolant channels. The mixing grid, having the channels, effectively mixes low temperature coolant with high temperature coolant within a fuel assembly, thus improving the thermal efficiency of the fuel assemblies. This mixing grid also effectively prevents the coolant from being partially overheated, thus improving the soundness of nuclear reactors. This mixing grid also has swirling flow blades and/or lateral flow blades to further improve the thermal efficiency of the fuel assembly. This mixing grid elastically supports the fuel rods by the sheets of the double strips, collaterally acting as positioning springs. Each double strip also has a vertical slot at a position around each channel, and so the elastic range of the positioning springs of the grid is preferably enlarged. The slots also enlarge the fuel rod contact area of the grid, thereby effectively protecting the fuel rod from fretting corrosion. In addition, the intersecting strips are welded together at the intersections through a continuous welding process, thus improving the mechanical strength of the grid.
摘要翻译：公开了一种用于核反应堆燃料组件的双条混合格栅。该格栅是通过以直角相交的方式制造的，每条双重条带通过将两片薄片焊接在一起形成具有冷却剂通道的单一结构而制成。具有通道的混合格栅将低温冷却剂与燃料组件内的高温冷却剂有效地混合，从而提高燃料组件的热效率。该混合格栅还有效地防止了冷却液部分过热，从而提高了核反应堆的稳定性。该混合格栅还具有旋流流动叶片和/或侧向流动叶片，以进一步提高燃料组件的热效率。该混合格栅通过双重条带的片材弹性地支撑燃料棒，作为定位弹簧。每个双条带还在每个通道周围的位置具有垂直槽，因此优选地扩大栅格的定位弹簧的弹性范围。这些槽也扩大了电网的燃料棒接触面积，从而有效地保护了燃料棒免受磨损腐蚀。另外，交叉条通过连续焊接工艺在交点处焊接在一起，从而提高了电网的机械强度。

3. 发明授权

US06421407B1 Nuclear fuel spacer grid with dipper vanes 有权
标题翻译：具有铲斗叶片的核燃料间隔栅格
公开(公告)号：US06421407B1
公开(公告)日：2002-07-16
申请号：US09439714
申请日：1999-11-12
申请人： Heung-Seok Kang , Kyung-Ho Yoon , Hyung-Kyu Kim , Kee-Nam Song , Youn-Ho Jung , Tae-Hyun Chun , Dong-Seok Oh , Wang-Kee In
发明人： Heung-Seok Kang , Kyung-Ho Yoon , Hyung-Kyu Kim , Kee-Nam Song , Youn-Ho Jung , Tae-Hyun Chun , Dong-Seok Oh , Wang-Kee In
IPC分类号： G21C3352
CPC分类号： G21C3/352 , G21C3/322 , G21C3/3563 , G21Y2002/101 , G21Y2002/201 , G21Y2002/206 , G21Y2002/303 , G21Y2004/30 , Y02E30/38
摘要： A nuclear fuel spacer grid, fabricated by intersecting a plurality of zircaloy or inconel grid strips and used for placing and supporting a plurality of elongated fuel rods within a nuclear fuel assembly, is disclosed. In the spacer grid of this invention, each of the grid strips is not cut away to form separate springs or dimples for supporting the fuel rods, but has an axial slot extending from one end of each strip to a length. The grid strips are intersected at the slots prior to being welded together into a single grid structure at a welding tap formed at an outside end or a middle portion of each of the slots. Each of the grid strips also has a dipper-shaped coolant mixing vane, or a dipper vane, at each of the upper and lower ends thereof. The spacer grid thus maximizes the thermal hydraulic coolant mixing effect within a fuel assembly and stably supports the fuel rods within the assembly while improving the mechanical/structural strength of the assembly, such as a buckling strength.
摘要翻译：公开了一种核燃料间隔栅格，其通过与多个锆石或铬镍铁合金网格条相交并用于在核燃料组件内放置和支撑多个细长燃料棒而制造。在本发明的间隔栅格中，每个栅格条不被切除以形成用于支撑燃料棒的单独的弹簧或凹坑，而是具有从每个条的一端延伸到一定长度的轴向槽。在形成在每个槽的外部端部或中间部分处的焊接接头处，将栅格条在焊缝之间相互焊接在一起成为单个格栅结构。每个格栅条在其上端和下端的每一端还具有杓形冷却剂混合叶片或杓形叶片。间隔网格因此使燃料组件内的热液压冷却剂混合效果最大化并且在改善组件的机械/结构强度（例如屈曲强度）的同时，稳定地支撑组件内的燃料棒。

4. 发明授权

US06744842B2 Fuel assembly for a pressurized-water reactor 失效
标题翻译：用于压水堆的燃料组件
公开(公告)号：US06744842B2
公开(公告)日：2004-06-01
申请号：US10247573
申请日：2002-09-19
申请人： Norbert Schmidt , Peter Rau , Erika Herzog
发明人： Norbert Schmidt , Peter Rau , Erika Herzog
IPC分类号： G21C3352
CPC分类号： G21C3/34 , G21Y2002/104 , G21Y2004/301 , Y02E30/40
摘要： A fuel assembly for a pressurized-water reactor includes fuel rods held in cells of spacers, control rod guide tubes, and a headpiece and a foot piece, by which it is fixed to upper and lower core grids, respectively. A spacer having a first part, which lies on a radially outer side with respect to a longitudinal center axis of the fuel assembly, and a second part, which lies on a radially inner side and is completely surrounded by the first part are included to reduce the size of gaps between fuel assemblies. The second part is formed of Zircaloy. The first part is made of a metallic material, and when compared to the Zircaloy of the second part, has a lower growth in the radial direction, caused by neutron radiation and a higher coefficient of thermal expansion.
摘要翻译：用于加压水反应器的燃料组件包括保持在间隔件单元中的燃料棒，控制棒导向管以及头盔和脚踏板，分别固定在上部和下部芯网格上。具有相对于燃料组件的纵向中心轴线位于径向外侧的第一部分和位于径向内侧并被第一部分完全包围的第二部分的间隔件被包括以减少燃料组件之间的间隙的大小。第二部分由Zircaloy组成。第一部分由金属材料制成，与第二部分的Zircaloy相比，由中子辐射和较高的热膨胀系数引起的径向增长较小。

5. 发明授权

US06606369B1 Nuclear reactor with improved grid 有权
标题翻译：核反应堆改良电网
公开(公告)号：US06606369B1
公开(公告)日：2003-08-12
申请号：US10092946
申请日：2002-03-06
申请人： Levie David Smith, III , Yonghwan Kim , Yu Chung Lee , David Lee Stucker
发明人： Levie David Smith, III , Yonghwan Kim , Yu Chung Lee , David Lee Stucker
IPC分类号： G21C3352
CPC分类号： G21C3/322 , G21C3/3563 , G21Y2002/303 , G21Y2004/30 , Y02E30/38
摘要： An improved grid for use in a fuel assembly of a nuclear reactor includes a plurality of straps connected in a lattice, with a plurality of mixing vanes being disposed on the straps and being arranged such that the hydraulic forces on the mixing vanes generally cancel one another out. The mixing vanes of diagonal quadrants of the grid are generally aligned with diagonally disposed imaginary alignment planes. Each strap includes a plurality of strap members, with each strap member including a spring and a pair of dimples. The spring includes a contoured spring embossment having a greater radius of curvature in a relaxed condition than the radius of a fuel rod. Each dimple includes a similarly configured contoured dimple embossment. The spring embossment is mounted on a pair of legs that extend nonlinearly between a first plate and a second plate of each strap member to increase compliance thereof.
摘要翻译：用于核反应堆的燃料组件的改进的格栅包括多个连接在格子上的条带，多个混合叶片设置在带上并且布置成使得混合叶片上的液压力通常互相抵消出来栅格对角象限的混合叶片通常与对角设置的虚拟对准平面对准。每个条带包括多个条带构件，每个条带构件包括弹簧和一对凹坑。弹簧包括在放松条件下具有比燃料棒的半径更大的曲率半径的轮廓弹簧压花。每个凹坑都包括类似配置的轮廓凹坑浮雕。弹簧压花安装在一对腿上，该腿在每个带构件的第一板和第二板之间非线性地延伸，以增加其顺应性。

6. 发明授权

US06320925B1 Space for a fuel assembly of a nuclear power station 失效
标题翻译：核电站燃料组件的间隔
公开(公告)号：US06320925B1
公开(公告)日：2001-11-20
申请号：US09238857
申请日：1999-01-27
申请人： Reiner Manzel , Werner Jahreiss , Norbert Schmidt , Josef Steven , Peter Dewes , Friedrich Garzarolli , Erhard Ortlieb , Franz-Josef Bökers , Matthias Rudolph
发明人： Reiner Manzel , Werner Jahreiss , Norbert Schmidt , Josef Steven , Peter Dewes , Friedrich Garzarolli , Erhard Ortlieb , Franz-Josef Bökers , Matthias Rudolph
IPC分类号： G21C3352
CPC分类号： G21C3/352 , G21C3/3424 , G21Y2002/103 , G21Y2004/301 , G21Y2004/305 , Y02E30/40
摘要： A spacer of a fuel assembly having intersecting webs undergoes reduced longitudinal expansion as a result of corrosion during an operating period. The webs have intersection locations at which assembly gaps are provided. The assembly gaps have widths which correspond essentially, at most over a fraction of their total length, to the wall thickness of an intersecting web, but are wider in a remaining region. Since corrosion layers growing from an edge of an assembly gap toward the intersecting web cannot touch the web, no solid pressure, which could lead to longitudinal expansion, builds up.
摘要翻译：具有相交腹板的燃料组件的间隔件在操作期间由于腐蚀而经历减小的纵向膨胀。腹板具有提供组装间隙的交叉位置。组装间隙的宽度基本上相当于其总长度的一小部分，与相交网的壁厚度相对应，但在其余区域中较宽。由于从组装间隙的边缘朝向相交的幅材生长的腐蚀层不能接触幅材，所以不会产生可能导致纵向膨胀的固体压力。

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