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公开(公告)号：US20090252281A1
公开(公告)日：2009-10-08
申请号：US12332662
申请日：2008-12-11
IPC分类号： G21C3/32
CPC分类号： G21C7/20 , G21Y2002/104 , G21Y2002/304 , G21Y2004/40 , Y02E30/39
摘要： A nuclear fuel assembly having a tube-in-tube control rod guide tube design that incorporates an end plug that extends axially upward to an elevation above the lower most grid where it is sealed at its upper end to the lower end of the control rod guide tube. The guide tube lower end plug has a threaded recess in its upper surface that mates with a corresponding dashpot end plug threaded extension that is formed as an insert in the lower end of the guide tube. A hole formed through the outer wall of the guide tube end plug at the elevation of the lower portion of the recess provides a positive inspection port for assuring the proper seating of the dashpot. A method of manufacture of such a fuel assembly is also disclosed.
摘要翻译： 一种核燃料组件，其具有管中管控制杆引导管设计，其包括沿轴向向上延伸到最下部格栅上方的高度的端塞，其在其上端被密封在控制杆引导件的下端 管。 引导管下端塞在其上表面具有螺纹凹槽，其与相应的缓冲器端塞螺纹延伸部配合，该延伸部形成为在导管的下端中的插入件。 在凹槽下部的高度处，通过导管端塞的外壁形成的孔提供了一个正的检查口，用于确保缓冲器的适当的安放。 还公开了一种制造这种燃料组件的方法。
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公开(公告)号：US07668284B2
公开(公告)日：2010-02-23
申请号：US12332662
申请日：2008-12-11
IPC分类号： G21C3/32
CPC分类号： G21C7/20 , G21Y2002/104 , G21Y2002/304 , G21Y2004/40 , Y02E30/39
摘要： A nuclear fuel assembly having a tube-in-tube control rod guide tube design that incorporates an end plug that extends axially upward to an elevation above the lower most grid where it is sealed at its upper end to the lower end of the control rod guide tube. The guide tube lower end plug has a threaded recess in its upper surface that mates with a corresponding dashpot end plug threaded extension that is formed as an insert in the lower end of the guide tube. A hole formed through the outer wall of the guide tube end plug at the elevation of the lower portion of the recess provides a positive inspection port for assuring the proper seating of the dashpot. A method of manufacture of such a fuel assembly is also disclosed.
摘要翻译： 一种核燃料组件，其具有管中管控制杆引导管设计，其包括沿轴向向上延伸到最下部格栅上方的高度的端塞，其在其上端被密封在控制杆引导件的下端 管。 引导管下端塞在其上表面具有螺纹凹槽，其与相应的缓冲器端塞螺纹延伸部配合，该延伸部形成为在导管的下端中的插入件。 在凹槽下部的高度处，通过导管端塞的外壁形成的孔提供了一个正的检查口，用于确保缓冲器的适当的安放。 还公开了一种制造这种燃料组件的方法。
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公开(公告)号：US07515674B2
公开(公告)日：2009-04-07
申请号：US11583466
申请日：2006-10-18
IPC分类号： G21C3/34
CPC分类号： G21C7/20 , G21Y2002/104 , G21Y2002/304 , G21Y2004/40 , Y02E30/39
摘要： A nuclear fuel assembly having a tube-in-tube control rod guide tube design that incorporates an end plug that extends axially upward to an elevation above the lower most grid where it is sealed at its tipper end to the lower end of the control rod guide tube. The guide tube lower end plug has a threaded recess in its upper surface that mates with a corresponding dashpot end plug threaded extension that is formed as an insert in the lower end of the guide tube. A hole formed through the outer wall of the guide tube end plug at the elevation of the lower portion of the recess provides a positive inspection port for assuring the proper seating of the dashpot. A method of manufacture of such a fuel assembly is also disclosed.
摘要翻译： 一种核燃料组件，其具有管中管控制杆引导管设计，其包括端轴塞，所述端塞沿轴向向上延伸至最下部格栅上方的高度，其中，在其倾斜端部处密封到控制杆引导件的下端 管。 引导管下端塞在其上表面具有螺纹凹槽，其与相应的缓冲器端塞螺纹延伸部配合，该延伸部形成为在导管的下端中的插入件。 在凹槽下部的高度处，通过导管端塞的外壁形成的孔提供了一个正的检查口，用于确保缓冲器的适当的安放。 还公开了一种制造这种燃料组件的方法。
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公开(公告)号：US20080137798A1
公开(公告)日：2008-06-12
申请号：US11583466
申请日：2006-10-18
IPC分类号： G21C3/00
CPC分类号： G21C7/20 , G21Y2002/104 , G21Y2002/304 , G21Y2004/40 , Y02E30/39
摘要： A nuclear fuel assembly having a tube-in-tube control rod guide tube design that incorporates an end plug that extends axially upward to an elevation above the lower most grid where it is sealed at its tipper end to the lower end of the control rod guide tube. The guide tube lower end plug has a threaded recess in its upper surface that mates with a corresponding dashpot end plug threaded extension that is formed as an insert in the lower end of the guide tube. A hole formed through the outer wall of the guide tube end plug at the elevation of the lower portion of the recess provides a positive inspection port for assuring the proper seating of the dashpot. A method of manufacture of such a fuel assembly is also disclosed.
摘要翻译： 一种核燃料组件，其具有管中管控制杆引导管设计，其包括端轴塞，所述端塞沿轴向向上延伸至最下部格栅上方的高度，其中，在其倾斜端部处密封到控制杆引导件的下端 管。 引导管下端塞在其上表面具有螺纹凹槽，其与相应的缓冲器端塞螺纹延伸部配合，该延伸部形成为在导管的下端中的插入件。 在凹槽下部的高度处，通过导管端塞的外壁形成的孔提供了一个正的检查口，用于确保缓冲器的适当的安放。 还公开了一种制造这种燃料组件的方法。
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公开(公告)号：US4935197A
公开(公告)日：1990-06-19
申请号：US205850
申请日：1988-06-13
CPC分类号： G21C3/328 , G21Y2002/201 , G21Y2004/30 , G21Y2004/60 , Y02E30/34 , Y02E30/38
摘要： A nuclear reactor core sub-assembly is provided with a removable lifting head (12)/absorber pin (20) assembly. The absorber pins (20) are connected to the lifting head (12) in such a way that they can be disconnected, inverted and reconnected the other way round, either collectively as a unit or individually. This allows the same absorber pins to be used at least twice over in different sub-assemblies since only the absorber material closest to the core tends to become depleted during irradiation.
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