公开(公告)号：US5274684A

公开(公告)日：1993-12-28

申请号：US966008

申请日：1992-10-23

申请人： Masashi Yoshida ,  Akio Sando ,  Junichi Oyama ,  Katsunori Ohuchi

发明人： Masashi Yoshida ,  Akio Sando ,  Junichi Oyama ,  Katsunori Ohuchi

IPC分类号： G21C21/00 ,  G21C3/334

CPC分类号： G21C3/334 ,  Y02E30/40

摘要： The present invention presents a method and an apparatus for assembling a fuel assembly which is free of surface damage on the fuel rod surfaces, and of distortions caused by residual stresses. Such problems are introduced by the method of inserting the fuel rods into the grids, and the sequence of attaching the control rod guiding pipes. In the conventional method, the guiding pipes are attached to the respective grids first and the fuel rods are inserted in the grids while the holding mechanisms (such as spring force against a dimple formed on the grid wall) are active. In the invented assembling method, the sprigs are deactivated first and then the fuel rods are inserted into the grids. Once the assembly is made firm with all the fuel rods in place and fixed firmly to the grids, the control rod guiding pipes are inserted into the grids and the pipes are fixed rigidly to the respective grids. By performing the assembling operation in the above sequence, slight shifting of the grids which occurs on fixing the pipes to the grids, during the conventional method, is prevented. The final assembly produced according to the invented method is free of surface damage and the overall quality of alignment of the assembly is excellent.

摘要翻译： 本发明提出了一种用于组装燃料组件的方法和装置，其在燃料棒表面上没有表面损伤以及由残余应力引起的变形。 这些问题是通过将燃料棒插入网格的方法和连接控制杆引导管的顺序引入的。 在常规方法中，引导管首先附接到各个格栅，并且燃料棒被插入格栅中，同时保持机构（诸如形成在网格壁上的凹坑的弹力）是活动的。 在本发明的组装方法中，首先将小柱排除，然后将燃料棒插入网格中。 一旦组装牢固，所有燃料棒就位就位并牢固地固定在网格上，控制杆导管插入网格中，管道固定在相应的格栅上。 通过以上述顺序进行组装操作，防止了在常规方法中将管道固定到栅格上时发生的栅格的轻微移动。 根据本发明的方法生产的最终组件没有表面损伤，并且组件的整体质量优良。

公开(公告)号：US5313507A

公开(公告)日：1994-05-17

申请号：US972370

申请日：1992-11-05

申请人： Katsunori Ohuchi ,  Junichi Oyama ,  Akio Sando

发明人： Katsunori Ohuchi ,  Junichi Oyama ,  Akio Sando

IPC分类号： G21C3/34 ,  G21C3/334 ,  G21C21/00 ,  G21C3/00

CPC分类号： G21C3/334 ,  Y02E30/40

摘要： An apparatus for attaching a key member to a nuclear fuel assembly grid and detaching the same therefrom is disclosed. The apparatus includes a supply and recovery mechanism, an inserting and removing mechanism, and a rotating mechanism. The supply and recovery mechanism operates to supply the key member to a prescribed position adjacent to the grid and recover the same. The inserting and removing mechanism is disposed between the supply and recovery mechanism and the grid, and operates to insert the key member supplied from the supply and recovery mechanism into the grid and remove the key member from the grid to recover the same to the supply and recovery mechanism. The rotating mechanism is disposed adjacent to the inserting and removing mechanism, and operates to rotate the key member inserted in the grid in a prescribed direction about the longitudinal axis to attach the same to the grid and rotate the same in a direction opposite to the prescribed direction to detach the same from the grid.

摘要翻译： 公开了一种用于将键构件附接到核燃料组件网格并将其从其分离的装置。 该装置包括供应和恢复机构，插入和移除机构以及旋转机构。 供应和恢复机构操作以将关键构件提供给与电网相邻的规定位置并恢复。 插入和移除机构设置在供应和恢复机构与电网之间，并操作以将从供应和恢复机构供应的钥匙件插入电网中，并将钥匙元件从电网中取出以将其恢复到电源和 恢复机制。 所述旋转机构设置在所述插入移除机构的附近，并且操作以使围绕所述纵向轴线的规定方向插入所述格栅中的所述键构件旋转，以将其附接到所述格栅并沿与所述规定的方向相反的方向旋转 方向从网格分离。

公开(公告)号：US5303272A

公开(公告)日：1994-04-12

申请号：US964073

申请日：1992-10-21

申请人： Junichi Oyama ,  Akio Sando ,  Shuji Yamazaki

发明人： Junichi Oyama ,  Akio Sando ,  Shuji Yamazaki

IPC分类号： G21C21/00 ,  G21C3/334 ,  G21C19/00

CPC分类号： G21C3/334 ,  Y02E30/40

摘要： The present invention relates to an apparatus for manipulating the springs which hold the fuel rods firmly inside the grid cells of the grids in a nuclear fuel assembly. Conventionally fuel rods are inserted into the grids while the grid springs are in the active position, thus exposing the rods to possibilities of surface scratches and potential problems. The invented automatic apparatus avoids the formation of such surface damage on the fuel rods, by inserting the keys to inactivate the grid springs before inserting the fuel rods into the grids and removing the keys after all the rods are in place. The apparatus thus contributes to efficient manufacturing of the fuel assembly by simplifying the key quantity management operations and other tasks associated with the assembling operations.

摘要翻译： 本发明涉及一种用于操纵弹簧的装置，其将燃料棒牢固地保持在核燃料组件中格栅的格栅内。 通常，将燃料棒插入网格中，同时格栅弹簧处于活动位置，从而使杆暴露于表面划痕和潜在问题的可能性。 本发明的自动装置通过在将燃料棒插入网格之前插入钥匙来灭活栅格弹簧并且在所有杆都到位之后去除钥匙，从而避免在燃料棒上形成这种表面损伤。 因此，该装置有助于通过简化关键数量管理操作和与组装操作相关联的其他任务来有效地制造燃料组件。

公开(公告)号：US5475913A

公开(公告)日：1995-12-19

申请号：US230240

申请日：1994-04-20

申请人： Junichi Oyama ,  Katsunori Ohuchi ,  Shunji Ono ,  Toshiyuki Kawagoe

发明人： Junichi Oyama ,  Katsunori Ohuchi ,  Shunji Ono ,  Toshiyuki Kawagoe

IPC分类号： G21C3/33 ,  G21C3/334 ,  B21D39/00

CPC分类号： G21C3/334 ,  Y02E30/40 ,  Y10T29/4994

摘要： A method of assembling a fuel assembly is presented so as to reduce radiation exposure to the assembly workers and to simplify the assembly procedure. Sleeves are pre-attached to an upper nozzle, and the guide pipes are inserted into respective grid cells through the sleeves of the upper nozzle and through the sleeves of the grids. The guide pipes are fixed in place to the sleeves of the upper nozzle and of the grids by bulging. There is no welding step necessary to join any of the assembly components while the assembly is in a semi-assembled condition. Therefore, the method is simple and efficient, and reduces the risk of radiation exposure to the assembly workers.

摘要翻译： 提出了一种组装燃料组件的方法，以减少对组装工人的辐射暴露并简化组装过程。 套管预先连接到上喷嘴，并且引导管通过上喷嘴的套筒和网格的套筒插入到相应的格格单元中。 引导管通过凸起固定在上喷嘴和网格的套筒上。 当组件处于半组装状态时，不需要焊接步骤来连接任何组件部件。 因此，该方法简单高效，降低组装工人辐射暴露的风险。

公开(公告)号：US5396526A

公开(公告)日：1995-03-07

申请号：US139035

申请日：1993-10-21

申请人： Katsunori Ohuchi ,  Junichi Oyama ,  Masashi Yoshida ,  Taichi Koiwai ,  Shuji Yamazaki

发明人： Katsunori Ohuchi ,  Junichi Oyama ,  Masashi Yoshida ,  Taichi Koiwai ,  Shuji Yamazaki

IPC分类号： G21C3/334 ,  G21C3/34 ,  G21C21/00 ,  G21C19/00

CPC分类号： G21C21/00 ,  G21C3/334 ,  G21Y2002/205 ,  G21Y2002/302 ,  G21Y2004/30 ,  G21Y2004/401 ,  Y02E30/40

摘要： An apparatus is presented for removing the inner and outer keys from a support grid of a fuel assembly automatically or by mechanical methods. The apparatus removes a line of keys from a loaded assembly inserted into a grid through an opening section of the grid to deflect the springs. Both ends of the keys are engaged with the engaging members, and one set of keys are rotated in one direction while the other set of keys are rotated in the opposite direction. The springs are then released to press on the fuel rods firmly in place between the springs and the dimples in the grid cell. The keys are removed from the grid by clamping or holding the keys and moving the keys together with the clamping/holding device in the key axis direction by operating the driving device until the keys are removed completely from the grid.

摘要翻译： 提供了一种用于从燃料组件的支撑格栅自动或通过机械方法去除内键和外键的装置。 该装置从通过网格的开口部分插入格栅的装载组件中移除一行键以偏转弹簧。 键的两端与接合构件接合，并且一组键在一个方向上旋转，而另一组键沿相反方向旋转。 弹簧然后被释放以将燃料棒牢固地压在弹簧和网格中的凹坑之间的位置。 通过夹紧或保持键并通过操作驱动装置将键与夹持/保持装置一起沿键轴方向移动，从而将钥匙从网格中移除，直到钥匙从电网完全移除。

公开(公告)号：US5114668A

公开(公告)日：1992-05-19

申请号：US469014

申请日：1990-01-23

申请人： Junichi Oyama ,  Kazuichi Suzuki ,  Akihiro Kato ,  Hitoshi Inada ,  Masaji Mori ,  Hiromasa Miyai ,  Toshiyuki Kawagoe

发明人： Junichi Oyama ,  Kazuichi Suzuki ,  Akihiro Kato ,  Hitoshi Inada ,  Masaji Mori ,  Hiromasa Miyai ,  Toshiyuki Kawagoe

IPC分类号： G21C3/34 ,  G21C3/356

CPC分类号： G21C3/3563 ,  Y02E30/40

摘要： In a grid in a nuclear fuel assembly for supporting fuel rods, elongated straps intersect with each other to define grid cells. At least one pair of punched sections are formed, in spaced relation to each other, in each of peripheral walls of the respective grid cells. At least one of elongated spring elements is formed in the peripheral wall of each grid cell. Each spring element is formed such that a portion of the peripheral wall of the grid cell between the pair of punched sections bulges and projects into the grid cell. The spring element is capable of being deflected toward the peripheral wall of the grid cell. A pair of projections are formed in the peripheral wall of the grid cell respectively at both longitudinal ends of the spring element such that a pair of portions of the peripheral wall of the grid cell bulge. Both longitudinal ends of the spring element are connected respectively to the pair of projections.

摘要翻译： 在用于支撑燃料棒的核燃料组件中的格栅中，细长带彼此相交以限定网格单元。 在相应网格单元的每个周壁中至少形成一对冲压部分，彼此间隔开。 细长弹簧元件中的至少一个形成在每个网格单元的周壁中。 每个弹簧元件形成为使得一对冲压部分之间的网格单元的周壁的一部分凸起并且突出到网格单元中。 弹簧元件能够朝向网格单元的周壁偏转。 在所述电池单元的周壁分别形成有一对凸起，所述两个突起在所述弹簧元件的两个纵向端处分别形成，使得所述电池单元的周壁的一对部分凸出。 弹簧元件的两个纵向端分别连接到一对突起。

公开(公告)号：US5289515A

公开(公告)日：1994-02-22

申请号：US745401

申请日：1991-08-15

申请人： Junichi Oyama ,  Kazuichi Suzuki ,  Akihiro Kato ,  Hitoshi Inada ,  Masaji Mori ,  Hiromasa Miyai ,  Toshiyuki Kawagoe

发明人： Junichi Oyama ,  Kazuichi Suzuki ,  Akihiro Kato ,  Hitoshi Inada ,  Masaji Mori ,  Hiromasa Miyai ,  Toshiyuki Kawagoe

IPC分类号： G21C3/34 ,  G21C3/334 ,  G21C21/00

CPC分类号： G21C3/334 ,  Y02E30/40

摘要： In a method of assembling a nuclear fuel assembly, a deflecting jig is inserted into grid cells in each of a plurality of grids. The diameter of the deflecting jig is enlarged to urge a spring of at least one pair of dimples and spring, associated with the grid cell to deflect the springs away from the dimple. A plurality of elongated key members are inserted into the grid cells through a plurality of openings defined at intersections between the straps forming walls of the grid cells. Each key member is rotated about its axis to cause hooks of the key member to project from a wall surface of the strap in a direction opposite to the projecting direction of the springs. The key member is then moved in a direction to engage the hooks with the wall surface of the strap. Urging of the spring by the deflecting jig is released to allow the same to be withdrawn from the grid cells and, subsequently, the fuel rods are inserted into the respective grid cells. The key member is then moved in a direction to bring the springs into pressure contact with the fuel rods. The key members are then withdrawn from the grid cells. A combination of the grid and the key member is also provided.

摘要翻译： 在组装核燃料组件的方法中，偏转夹具插入到多个网格中的每一个中的网格单元中。 偏转夹具的直径被扩大以促使与网格单元相关联的至少一对凹坑和弹簧的弹簧，以使弹簧偏离凹坑。 多个细长的键构件通过限定在形成网格单元的壁的带的相交处的多个开口插入到网格单元中。 每个键构件围绕其轴线旋转，使得键构件的钩子沿着与弹簧的突出方向相反的方向从带的壁表面突出。 然后将键构件沿着将钩与带的壁表面接合的方向移动。 通过偏转夹具推动弹簧被释放以允许其从网格单元中取出，并且随后将燃料棒插入相应的格栅单元中。 然后将钥匙件沿一个方向移动以使弹簧与燃料棒压力接触。 然后将关键成员从网格单元中撤出。 还提供了网格和关键成员的组合。

公开(公告)号：US5068081A

公开(公告)日：1991-11-26

申请号：US460626

申请日：1990-01-03

申请人： Junichi Oyama ,  Kazuichi Suzuki ,  Akihiro Kato ,  Hitoshi Inada ,  Masaji Mori ,  Hiromasa Miyai ,  Toshiyuki Kawagoe

发明人： Junichi Oyama ,  Kazuichi Suzuki ,  Akihiro Kato ,  Hitoshi Inada ,  Masaji Mori ,  Hiromasa Miyai ,  Toshiyuki Kawagoe

IPC分类号： G21C3/34 ,  G21C3/334 ,  G21C21/00

CPC分类号： G21C3/334 ,  Y02E30/40

摘要： In a method of assembling a nuclear fuel assembly, a deflecting jig is inserted into grid cells in each of a plurality of grids. The diameter of the deflecting jig is enlarged to urge a spring of at least one pair of dimples and spring associated with the grid cell to deflect the spring away from the dimple. A plurality of elongated key members are inserted into the grid cells through a plurality of openings defined at intersections between the straps forming walls of the grid cells. Each key member is rotated about its axis to cause hooks of the key member to project from a wall surface of the strap in a direction opposite to the projecting direction of the springs. The key member is then moved in a direction to engage the hooks with the wall surface of the strap. Urging of the spring by the deflecting jig is released to allow the same to be withdrawn from the grid cells and, subsequently, the fuel rods are inserted into the respective grid cells. The key number is then moved in a direction to bring the springs into pressure contact with the fuel rods. The key members are then withdrawn from the grid cells.

摘要翻译： 在组装核燃料组件的方法中，偏转夹具插入到多个网格中的每一个中的网格单元中。 偏转夹具的直径被扩大以促使与网格单元相关联的至少一对凹坑和弹簧的弹簧使弹簧偏离凹坑。 多个细长的键构件通过限定在形成网格单元的壁的带的相交处的多个开口插入到网格单元中。 每个键构件围绕其轴线旋转，使得键构件的钩子沿着与弹簧的突出方向相反的方向从带的壁表面突出。 然后将键构件沿着将钩与带的壁表面接合的方向移动。 通过偏转夹具推动弹簧被释放以允许其从网格单元中取出，并且随后将燃料棒插入相应的格栅单元中。 然后将钥匙号向一个方向移动以使弹簧与燃料棒压力接触。 然后将关键成员从网格单元中撤出。

公开(公告)号：US5263065A

公开(公告)日：1993-11-16

申请号：US996021

申请日：1992-12-23

申请人： Junichi Oyama ,  Taichi Koiwai ,  Shuji Yamazaki

发明人： Junichi Oyama ,  Taichi Koiwai ,  Shuji Yamazaki

IPC分类号： G21C21/00 ,  G21C3/334

CPC分类号： G21C3/334 ,  Y02E30/40

摘要： The purpose of the present invention is to provide an apparatus which can insert a plurality of hooks into slits of a strap constructing a grid and to hold springs so that the spaces of grid cells are enlarged simultaneously. The enlargement enables insertion of fuel rods into the cells. The apparatus comprises a frame member adapted to attach to the strap along the longitudinal direction thereof, a pair of clamping members engaged the frame member and extending in the longitudinal direction of the strap. Each clamping member can move along the longitudinal direction of the strap. The clamping member has a plurality of projecting hooks arranged in the longitudinal direction of the strap in a spaced relation to one another. The end of the hooks of one of the clamping means are bent toward a longitudinal direction of the strap, while the hooks of another clamping means are bent toward another longitudinal direction of the strap.

摘要翻译： 本发明的目的是提供一种装置，其可以将多个钩子插入到构成网格的带的狭缝中并且保持弹簧，使得网格单元的空间同时扩大。 放大能够将燃料棒插入电池。 该装置包括适于沿着其纵向方向附接到带的框架构件，一对夹紧构件与框架构件接合并沿着带的纵向方向延伸。 每个夹紧构件可以沿着带的纵向方向移动。 夹紧构件具有沿着带的纵向布置的彼此间隔开的多个突出钩。 夹紧装置中的一个的钩的端部朝向带的纵向方向弯曲，而另一夹紧装置的钩向带的另一纵向方向弯曲。

公开(公告)号：US5638416A

公开(公告)日：1997-06-10

申请号：US353388

申请日：1994-12-02

申请人： Junichi Oyama ,  Akihiro Kato ,  Masaji Mori ,  Toshiyuki Kawagoe ,  Kazuichi Suzuki ,  Hitoshi Inada ,  Hiromasa Miyai

发明人： Junichi Oyama ,  Akihiro Kato ,  Masaji Mori ,  Toshiyuki Kawagoe ,  Kazuichi Suzuki ,  Hitoshi Inada ,  Hiromasa Miyai

IPC分类号： G21C3/34 ,  G21C3/352 ,  G21C3/356

CPC分类号： G21C3/352 ,  G21C3/356 ,  G21Y2002/101 ,  G21Y2002/207 ,  G21Y2004/30 ,  Y02E30/40

摘要： An arrangement of fuel rod support members having dimples and springs is presented to prevent abrasive wear of the fuel rods caused by bouncing of the fuel rods against the supporting members caused by vibrations in a diagonal direction of the support grids. The supporting members are disposed such that dimples are respectively provided on one pair of adjacent walls located on one side of the vibrational direction while springs are respectively provided on adjacent walls located on the opposite side of the vibrational direction.

摘要翻译： 提供了具有凹坑和弹簧的燃料棒支撑构件的布置，以防止由于支撑栅格的对角线方向上的振动引起的燃料棒反弹抵靠支撑构件而引起的燃料棒磨损。 支撑构件设置成使得凹坑分别设置在位于振动方向的一侧上的一对相邻壁上，而弹簧分别设置在位于振动方向的相对侧上的相邻壁上。