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1. 发明授权

US12002593B2 Deforming a portion of a nut threaded on a guide tube end plug to lock the nut to a lower end fitting of a nuclear reactor fuel assembly 有权
公开(公告)号：US12002593B2
公开(公告)日：2024-06-04
申请号：US17690793
申请日：2022-03-09
申请人： BWXT mPower, Inc.
发明人： Julius M. Ullmann , Lewis A. Walton , Mary W. Johnson
IPC分类号： G21C3/33 , F16B39/02 , B25B23/00 , F16B23/00
CPC分类号： G21C3/3305 , F16B39/025 , G21C3/331 , B25B23/0092 , F16B23/0015 , G21C3/3315 , Y02E30/30
摘要： An apparatus including a lower end fitting having a top planar surface, a bottom planar surface, a counterbore defined therebetween, an opening extending from the counterbore to the top planar surface, and a lock recess that extends both radially outwardly from the counterbore and extends inwardly into the lower end fitting from the bottom planar surface. The apparatus includes a guide tube having a lower end and an end plug configured to connect with the lower end of the guide tube. The end plug has a threaded shaft sized to pass through the opening of the lower end fitting, and a female lock nut has a deformable side wall configured to be swaged into the recess of the lower end fitting. The lock recess remains visible as viewed from the bottom planar surface of the lower end fitting when the female lock nut is fully disposed in the counterbore.

2. 发明授权

US07995701B2 Nuclear core component hold-down assembly 有权
标题翻译：核心部件压紧组件
公开(公告)号：US07995701B2
公开(公告)日：2011-08-09
申请号：US12124195
申请日：2008-05-21
申请人： Jin Liu , Yu Chung Lee
发明人： Jin Liu , Yu Chung Lee
IPC分类号： G21C3/33
CPC分类号： G21C3/331 , G21C3/3315 , G21C3/334 , G21Y2002/304 , G21Y2002/401 , G21Y2004/30 , Y02E30/40
摘要： A plate mounted fuel assembly hold-down system that provides a defined channel for both the insertion and removal of reactor head mounted, fixed in-core detector instrumentation, provides a guided path for the fixed in-core detector during insertion, and shields the instrument shroud against coolant cross flow. The hold-down assembly includes a base plate that seats on the adapter plate of the fuel assembly and has openings that align with the control rod guide thimbles. A hollow sleeve extends through and below a central opening in the base plate to mate with the fuel assembly instrument thimble. The sleeve extends above the base plate and through and above an upper core plate of the reactor. A hold-down bar is slidably mounted on the sleeve and is restrained below the top of the sleeve. A spring is positioned around the sleeve and is captured between the hold-down bar and the base plate.
摘要翻译：提供用于插入和拆卸反应器头安装的固定核心检测器仪表的限定通道的板式燃料组件压紧系统为插入期间的固定核心检测器提供了导向路径，并屏蔽了仪器防止冷却液横流。压紧组件包括一个底板，该底座位于燃料组件的适配器板上并具有与控制棒导向套管对准的开口。中空套筒延伸穿过基板中的中心开口并在其下方与燃料组件仪表套管配合。套筒在基板上延伸并且穿过反应器的上芯板并且上方。压紧杆可滑动地安装在套筒上并且被限制在套筒的顶部之下。弹簧定位在套筒周围，并被夹在压紧杆和底板之间。

3. 发明申请

US20110182395A1 HOLD-DOWN SPRING UNIT FOR TOP NOZZLE OF NUCLEAR FUEL ASSEMBLY HAVING IMPROVED HOLD-DOWN PERFORMANCE AND TOP NOZZLE FOR NUCLEAR FUEL ASSEMBLY HAVING THE SAME 有权
标题翻译：用于具有改进的保持性能的核燃料组件的顶部喷嘴的保持弹簧单元和具有该燃料组件的核燃料组件的顶部喷嘴
公开(公告)号：US20110182395A1
公开(公告)日：2011-07-28
申请号：US12748369
申请日：2010-03-26
申请人： JOON KYOO PARK , Jin Seok Lee , Kyeong Lak Jeon , Jung Min Suh , Gi-Jun Gwon , Nam Gyu Park , Kyong Bo Eom , Jin Sun Kim , Dong Geun Ha , Kyoung Joo Kim
发明人： JOON KYOO PARK , Jin Seok Lee , Kyeong Lak Jeon , Jung Min Suh , Gi-Jun Gwon , Nam Gyu Park , Kyong Bo Eom , Jin Sun Kim , Dong Geun Ha , Kyoung Joo Kim
IPC分类号： G21C3/02
CPC分类号： G21C3/331 , G21C3/3315 , Y02E30/40
摘要： Disclosed herein is a hold-down spring unit for a top nozzle of a nuclear fuel assembly. The hold-down spring unit is coupled to the upper end of the top nozzle of the nuclear fuel assembly. The hold-down spring unit includes a first spring which acts against a hold-down force with respect to the nuclear fuel assembly under start-up conditions or hot full power conditions of a nuclear reactor, and a second spring which acts against a hold-down force with respect to the nuclear fuel assembly under start-up conditions of the nuclear reactor. The present invention reduces the hold-down margin under start-up conditions or hot full power conditions, thus enhancing the mechanical and structural stability of the nuclear fuel assembly.
摘要翻译：本文公开了一种用于核燃料组件的顶部喷嘴的压紧弹簧单元。压紧弹簧单元联接到核燃料组件的顶部喷嘴的上端。压紧弹簧单元包括第一弹簧，其在核反应堆的启动条件或热全功率条件下抵抗相对于核燃料组件的压紧力，以及第二弹簧，在核反应堆的启动条件下对核燃料组件的下降力。本发明在启动条件或热全功率条件下降低了压紧余量，从而提高了核燃料组件的机械和结构稳定性。

4. 发明申请

US20060251205A1 In-core fuel restraint assembly 审中-公开
标题翻译：核心燃料约束组件
公开(公告)号：US20060251205A1
公开(公告)日：2006-11-09
申请号：US11120265
申请日：2005-05-02
申请人： Leonard Balog
发明人： Leonard Balog
IPC分类号： G21C15/00
CPC分类号： G21C3/3305 , G21C3/331 , G21C3/3315 , Y02E30/40
摘要： An in-core restraint assembly is for a nuclear reactor core including an upper core plate, a lower core support plate and a plurality of fuel assemblies extending longitudinally therebetween. Each fuel assembly includes top and bottom nozzles and a plurality of elongated fuel rods extending therebetween. The in-core restraint assembly includes a first restraint element, such as a spring pack, coupled to the upper core support plate and providing a substantially axial compressive force on the top nozzle of the fuel assembly. An optional second restraint element is structured to be coupled to the lower core plate in order to engage and further restrain the fuel assembly proximate the bottom nozzle. The second restraint element includes a pin member extending from the bottom nozzle of the fuel assembly and received in a socket coupled to the lower core support plate, whereby this mating sustains a longitudinal (vertical) frictional force which must be overcome before fuel assembly lift off can occur.
摘要翻译：芯核约束组件用于核反应堆堆芯，包括上芯板，下芯支撑板和在其间纵向延伸的多个燃料组件。每个燃料组件包括顶部和底部喷嘴以及在它们之间延伸的多个细长的燃料棒。芯内约束组件包括耦合到上芯支撑板并且在燃料组件的顶部喷嘴上提供基本上轴向的压缩力的第一约束元件，例如弹簧组件。可选的第二约束元件构造成联接到下芯板，以便接合并进一步限制靠近底部喷嘴的燃料组件。第二约束元件包括从燃料组件的底部喷嘴延伸并被接收在耦合到下部芯部支撑板的插座中的销构件，由此该配合维持在燃料组件提升之前必须克服的纵向（垂直）摩擦力可以发生。

5. 发明授权

US4534933A Nuclear reactor fuel assembly with improved top nozzle and hold-down means 失效
标题翻译：具有改进的顶部喷嘴和压紧装置的核反应堆燃料组件
公开(公告)号：US4534933A
公开(公告)日：1985-08-13
申请号：US542625
申请日：1983-10-17
申请人： Robert K. Gjertsen , Luciano Veronesi
发明人： Robert K. Gjertsen , Luciano Veronesi
IPC分类号： G21C3/33 , G21C19/28
CPC分类号： G21C3/3315 , G21C3/33 , G21C3/331 , G21Y2002/302 , G21Y2002/40 , G21Y2004/30 , G21Y2004/50 , Y02E30/40
摘要： A nuclear reactor fuel assembly having an improved top nozzle subassembly with a hold-down device incorporated therewithin to prevent the force of the upward coolant flow from lifting the fuel assembly into damaging contact with the upper core support plate, while allowing for changes in fuel assembly length due to core-induced thermal expansion. The construction of the fuel assembly is such that its top surface can be placed in direct contact with the upper core plate. Thermal expansion of the components of the fuel assembly in the upward direction are accommodated within the top nozzle subassembly.
摘要翻译：一种核反应堆燃料组件，其具有改进的顶部喷嘴子组件，其具有结合在其中的压紧装置，以防止向上的冷却剂流动的作用力使燃料组件升高与上部芯部支撑板的损伤接触，同时允许燃料组件长度由于核心引起的热膨胀。燃料组件的结构使得其顶表面可以被放置成与上芯板直接接触。燃料组件的部件在向上方向上的热膨胀被容纳在顶部喷嘴子组件内。

6. 发明授权

US3431170A Nuclear reactor fuel bundle 失效
标题翻译：核反应堆燃料箱
公开(公告)号：US3431170A
公开(公告)日：1969-03-04
申请号：US3431170D
申请日：1966-12-07
申请人： GEN ELECTRIC
发明人： LASS JAMES L , VENIER DOMINIC A
IPC分类号： G21C1/08 , G21C3/04 , G21C3/32 , G21C3/33 , G21C3/334 , G21C3/10
CPC分类号： G21C3/3305 , G21C1/08 , G21C3/04 , G21C3/32 , G21C3/331 , G21C3/3315 , G21C3/334 , Y02E30/40 , Y10S411/983

7. 发明申请

US20130003910A1 HOLD-DOWN SPRING UNIT FOR TOP NOZZLE OF NUCLEAR FUEL ASSEMBLY, AND TOP NOZZLE FOR NUCLEAR FUEL ASSEMBLY EMPLOYING THE HOLD-DOWN SPRING UNIT 有权
标题翻译：用于核燃料组件顶部喷嘴的向下弹簧单元，以及使用保持弹簧单元的核燃料组件的顶部喷嘴
公开(公告)号：US20130003910A1
公开(公告)日：2013-01-03
申请号：US13527788
申请日：2012-06-20
申请人： Joon Kyoo PARK , Jin Seok LEE , Kyeong Lak JEON , Jung Min SUH , Gi-Jun GWON , Nam Gyu PARK , Kyong Bo EOM , Jin Sun KIM , Dong Geun HA , Kyoung Joo KIM
发明人： Joon Kyoo PARK , Jin Seok LEE , Kyeong Lak JEON , Jung Min SUH , Gi-Jun GWON , Nam Gyu PARK , Kyong Bo EOM , Jin Sun KIM , Dong Geun HA , Kyoung Joo KIM
IPC分类号： G21C3/02
CPC分类号： G21C3/331 , G21C3/3315 , Y02E30/40
摘要： A hold-down spring unit for a top nozzle of a nuclear fuel assembly. The hold-down spring unit is coupled to the upper end of the top nozzle of the nuclear fuel assembly. The hold-down spring unit includes a first spring which provides a hold-down force upon the nuclear fuel assembly under start-up conditions or hot full power conditions of a nuclear reactor, and a second spring which provides an additional hold-down force upon the nuclear fuel assembly under start-up conditions of the nuclear reactor. The hold-down margin under start-up conditions or hot full power conditions is reduced, thus enhancing the mechanical and structural stability of the nuclear fuel assembly.
摘要翻译：用于核燃料组件的顶部喷嘴的压紧弹簧单元。压紧弹簧单元联接到核燃料组件的顶部喷嘴的上端。压紧弹簧单元包括第一弹簧，其在核反应堆的启动条件或热全功率条件下向核燃料组件提供压紧力，以及向第二弹簧提供额外的压紧力核燃料组件在核反应堆的启动条件下。在启动条件或热全功率条件下的压紧余量减少，从而提高核燃料组件的机械和结构稳定性。

8. 发明申请

US20100166134A1 Top Nozzle Having On-Off Type Of Hold-Down Spring In Nuclear Fuel Assembly 有权
标题翻译：顶部喷嘴在核燃料组件中具有开关类型的压紧弹簧
公开(公告)号：US20100166134A1
公开(公告)日：2010-07-01
申请号：US11970884
申请日：2008-01-08
申请人： Joon-kyoo PARK , Joon-hyung Choi , Kyu-Tae Kim , Jung-min Suh , Shin-ho Lee , Nam-gyu Park , Kyong-bo Eom , Jin-sun Kim , Jin-seok Lee , Seong-ki Lee
发明人： Joon-kyoo PARK , Joon-hyung Choi , Kyu-Tae Kim , Jung-min Suh , Shin-ho Lee , Nam-gyu Park , Kyong-bo Eom , Jin-sun Kim , Jin-seok Lee , Seong-ki Lee
IPC分类号： G21C15/00
CPC分类号： G21C3/331 , G21C3/3315 , Y02E30/40
摘要： The present invention relates to a top nozzle having on-off type of hold-down springs for a nuclear fuel assembly that has a two-stage elastic section such that a pushing force against the axial movement of the nuclear fuel assembly under normal conditions is optimized and at the same time a suppressing force against a drastic uplifting force of the nuclear fuel assembly under transient conditions is strengthened, and that lowers the elastic coefficients of the springs operating under normal conditions more than those of existing coil springs, thereby providing an optimal pushing force against the nuclear fuel assembly.
摘要翻译：本发明涉及具有用于核燃料组件的开 - 关式压缩弹簧的顶部喷嘴，其具有两级弹性部分，使得在正常条件下抵抗核燃料组件的轴向运动的推动力被优化并且同时在瞬态条件下增强了抵抗核燃料组件的急剧上升力的抑制力，并且降低了在正常条件下比现有螺旋弹簧运行的弹簧的弹性系数，从而提供了最佳推动对核燃料组件的力量。

9. 发明授权

US06738447B1 High energy absorption top nozzle for a nuclear fuel assembly 有权
标题翻译：用于核燃料组件的高能量吸收顶部喷嘴
公开(公告)号：US06738447B1
公开(公告)日：2004-05-18
申请号：US10444469
申请日：2003-05-22
申请人： James A. Sparrow , Yuriy Aleshin , Aleksey Slyeptsov
发明人： James A. Sparrow , Yuriy Aleshin , Aleksey Slyeptsov
IPC分类号： G21C300
CPC分类号： G21C3/3315 , G21C3/331 , G21C7/20 , G21Y2002/303 , G21Y2002/304 , G21Y2004/30 , Y02E30/39
摘要： A high energy absorption top nozzle for a nuclear fuel assembly that employs an elongated upper tubular housing and an elongated lower tubular housing slidable within the upper tubular housing. The upper and lower housings are biased away from each other by a plurality of longitudinally extending springs that are restrained by a longitudinally moveable piston whose upward travel is limited within the upper housing. The energy imparted to the nozzle by a control rod scram is mostly absorbed by the springs and the hydraulic affect of the piston within the nozzle.
摘要翻译：用于核燃料组件的高能量吸收顶部喷嘴，其采用细长的上部管状壳体和可在上部管状壳体内滑动的细长的下部管状壳体。上壳体和下壳体被多个纵向延伸的弹簧彼此远离，该弹簧由纵向可移动的活塞约束，其向上行程限制在上壳体内。通过控制杆冲击而施加到喷嘴的能量主要被弹簧吸收并且活塞在喷嘴内的液压影响。

10. 发明授权

US4678618A Individual source positioning mechanism for a nuclear reactor fuel assembly 失效
标题翻译：用于核反应堆燃料组件的单个源定位机构
公开(公告)号：US4678618A
公开(公告)日：1987-07-07
申请号：US642607
申请日：1984-08-20
申请人： John F. Wilson , Robert K. Gjertsen , Samuel Cerni
发明人： John F. Wilson , Robert K. Gjertsen , Samuel Cerni
IPC分类号： G21C7/34 , G21C3/33
CPC分类号： G21C3/331 , G21C3/33 , G21C3/3315 , G21Y2002/304 , G21Y2004/30 , Y02E30/40
摘要： A secondary source positioning mechanism for a fuel assembly in a nuclear reactor locates an individual one of the secondary sources in a respective guide thimble of the fuel assembly aligned with an opening defined through the upper core plate which overlies the fuel assembly. The positioning mechanism has a tapered locating boss which registers with a chamfer on the lower side of the core plate about one of its openings and a resilient holddown device which resiliently couples the upper end of a rod containing the secondary source to the locating boss in a manner which restrains the upper end of the rod in the lateral direction and positions the secondary source rod in the axial direction.
摘要翻译：用于核反应堆中的燃料组件的次级源定位机构将单独的一个次级源定位在燃料组件的相应导向套管中，该导向套管与通过覆盖燃料组件的上芯板限定的开口对准。定位机构具有锥形定位凸台，该凸台与其中一个开口的芯板的下侧上的倒角对准，以及弹性压紧装置，其将包含次级源的杆的上端弹性耦合到定位凸台限制杆的上端在横向方向上并且将次级源杆沿轴向定位的方式。

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