公开(公告)号：US5809101A

公开(公告)日：1998-09-15

申请号：US655875

申请日：1996-05-29

申请人： Thomas G. Dunlap ,  Gerald M. Latter ,  Mark J. Colby ,  Michael R. Stepp

发明人： Thomas G. Dunlap ,  Gerald M. Latter ,  Mark J. Colby ,  Michael R. Stepp

IPC分类号： G21C3/12 ,  G21C3/322 ,  G21C19/19 ,  G21C3/32

CPC分类号： G21C3/12 ,  G21C3/322 ,  Y02E30/38

摘要： A fuel bundle assembly for a nuclear reactor includes a modified channel and a handle unit that improves pressure drop performance. With the modified channel, one approach is to vary the outside dimension of the fuel channel along the length of the channel, but maintain a constant channel wall thickness. Another approach is to maintain the external dimensions of the fuel channel and vary the wall thickness along the length of the channel. The handle unit is formed including a handle member and a separate rod support member releasably engageable with the handle member. The handle member includes channels for receiving latch pin assemblies, coolant rods and a spacer assembly. The rod support member includes a plurality of fuel rod support chambers providing lateral support for the fuel rods of the fuel assembly. The rod support member also includes a main chamber that is sized to receive a portion of the handle member in a friction fit. In addition to providing improved pressure drop performance, the arrangement eliminates the need to realign the fuel rods in an upper tie plate or an upper spacer when access to the fuel rods is necessary. In addition, the handle unit serves to prevent failed end plugs from escaping the fuel bundle.

摘要翻译： 用于核反应堆的燃料束组件包括改进的通道和提高压降性能的手柄单元。 使用改进的通道，一种方法是沿通道的长度改变燃料通道的外部尺寸，但是保持恒定的通道壁厚度。 另一种方法是保持燃料通道的外部尺寸并沿着通道的长度改变壁厚度。 手柄单元形成为包括手柄构件和可释放地与手柄构件接合的单独的杆支撑构件。 手柄构件包括用于接收闩锁销组件，冷却剂棒和间隔件组件的通道。 杆支撑构件包括多个燃料棒支撑室，为燃料组件的燃料棒提供侧向支撑。 杆支撑构件还包括主室，其尺寸适于以摩擦配合接收手柄构件的一部分。 除了提供改进的降压性能之外，当需要进入燃料棒时，该布置消除了在上连接板或上隔板中重新对准燃料棒的需要。 此外，手柄单元用于防止失效的端塞从燃料束逸出。

公开(公告)号：US5787140A

公开(公告)日：1998-07-28

申请号：US654957

申请日：1996-05-29

申请人： Thomas G. Dunlap ,  Gerald M. Latter ,  Mark J. Colby ,  Michael R. Stepp

发明人： Thomas G. Dunlap ,  Gerald M. Latter ,  Mark J. Colby ,  Michael R. Stepp

IPC分类号： G21C3/324 ,  G21C3/334 ,  G21C3/32

CPC分类号： G21C3/334 ,  G21C3/324 ,  G21Y2002/201 ,  G21Y2002/301 ,  G21Y2002/303 ,  G21Y2004/302 ,  G21Y2004/305 ,  Y02E30/40

摘要： A fuel bundle assembly for a nuclear reactor includes a modified channel that improves pressure drop performance and a handle assembly that includes structure for preventing a broken end plug from escaping the fuel bundle. In modifying the channel, one approach is to vary the outside dimension of the fuel channel along the length of the channel, but maintain a constant channel wall thickness. Another approach is to maintain the external dimensions of the fuel channel and vary the wall thickness along the length of the channel. The handle assembly replaces the conventional upper tie plate and is provided with structure for preventing debris such as a broken fuel rod end plug from escaping the fuel bundle. The structure preferably includes a plurality of gridwork cross members forming a substantially square grid including gridwork windows that are sized smaller than the fuel rod end plugs.

摘要翻译： 用于核反应堆的燃料束组件包括改进压降性能的改进通道和包括防止破坏的端塞从燃料束逸出的结构的手柄组件。 在修改通道时，一种方法是沿着通道的长度改变燃料通道的外部尺寸，但是保持恒定的通道壁厚度。 另一种方法是保持燃料通道的外部尺寸并沿着通道的长度改变壁厚度。 手柄组件取代了常规的上连接板，并且设置有用于防止诸如破坏的燃料棒端塞的碎屑从燃料束逸出的结构。 该结构优选地包括多个格栅横向构件，其形成大致正方形的格栅，包括尺寸小于燃料棒端塞的格栅窗。