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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
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。
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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
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。
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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
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。
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公开(公告)号：US5515408A
公开(公告)日：1996-05-07
申请号：US352849
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
CPC分类号： G21C3/322 , G21C3/352 , G21Y2002/101 , G21Y2002/207 , G21Y2004/302 , Y02E30/38
摘要： A fuel assembly is presented in which a plurality of support grids are disposed along the longitudinal direction of the fuel rods. The straps forming the grid cells of the support grids are provided with mixing vanes for generating turbulent flow of the cooling water passing through the grid cells. In a plan view of the support girds, each of the mixing vanes protrudes inwardly of the grid cells and is disposed along a positive diagonal direction and a negative diagonal direction. This configuration of the mixing vanes are effective in preventing the generation of systematic vibrations in the fuel assembly by canceling the effects of the turbulent flows of the cooling water. The direction of protrusion of the mixing vanes can be in two diagonal directions within one support grid, or it can be unidirectional along either diagonal direction within one support grid.
摘要翻译： 提出了一种燃料组件，其中沿着燃料棒的纵向方向设置有多个支撑格栅。 形成支撑网格的网格单元的条带设置有用于产生通过网格单元的冷却水的湍流的混合叶片。 在支撑线的平面图中，每个混合叶片向网格单元的内部突出并且沿着正的对角线方向和负的对角线方向设置。 混合叶片的这种构造通过消除冷却水的湍流的影响来有效地防止燃料组件中的系统振动的产生。 混合叶片的突出方向可以在一个支撑格栅内的两个对角线方向上，或者它可以在一个支撑格栅内的任一对角线方向上是单向的。
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公开(公告)号：US5359633A
公开(公告)日：1994-10-25
申请号：US128138
申请日：1993-09-29
申请人： Junichi Oyama , Kazuichi Suzuki , Akhirio Kato , Hitoshi Inada , Masaji Mori , Hiromasa Miyai , Toshiyuki Kawagoe
发明人： Junichi Oyama , Kazuichi Suzuki , Akhirio Kato , Hitoshi Inada , Masaji Mori , Hiromasa Miyai , Toshiyuki Kawagoe
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.
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栅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。
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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
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。
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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
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。
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公开(公告)号：US5371769A
公开(公告)日：1994-12-06
申请号：US87900
申请日：1993-07-09
申请人： Akihiro Kato , Kinichi Sugai , Hiroaki Kadono , Masaji Mori , Yasunao Yamaguchi , Atsushi Baba , Toshiyuki Kawagoe , Masahiko Imaizumi
发明人： Akihiro Kato , Kinichi Sugai , Hiroaki Kadono , Masaji Mori , Yasunao Yamaguchi , Atsushi Baba , Toshiyuki Kawagoe , Masahiko Imaizumi
CPC分类号： G21C3/352 , G21C3/3566 , G21Y2002/201 , G21Y2002/206 , G21Y2002/303 , G21Y2004/30 , Y02E30/40
摘要： A grid structure is presented in which grid cells are formed by orthogonally intersecting straps prefitted in the longitudinal direction with a plurality of slitted spring frame members. Therefore, when the straps are assembled, the spring frame members are also orthogonally intersected. The spring frame members are made of Inconel and provided with welding tabs while the straps are made of zircalloy and provided with their own welding tabs. Therefore, welding can be performed to firmly join the spring frame members to each other while the straps can also be welded firmly to weld the like metals. The spring sections are thus firmly joined and attached to the straps which are firmly joined. The grid of this configuration thus provides an excellent service life without the losing The fuel rod retaining power, which would result from neutron radiation and thermal damages on holding devices made of zircalloy.
摘要翻译： 提出了一种网格结构，其中网格单元由在纵向方向上预先设置的正交相交的带形成有多个狭缝的弹簧框架构件。 因此，当组装带子时，弹簧框架构件也正交相交。 弹簧框架构件由铬镍铁合金制成，并配有焊接片，而带子由锆合金制成并具有自己的焊接片。 因此，可以进行焊接以将弹簧框架构件彼此牢固地连接，同时也可以牢固地焊接带子以焊接类似的金属。 因此，弹簧部分牢固地连接并连接到牢固连接的带子上。 因此，这种结构的电网提供了极好的使用寿命，而不会因为由锆合金制成的保持装置上的中子辐射和热损伤而导致的燃料棒保持力丧失。
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