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51. 发明授权

US5627866A Fuel assembly structure using channel for load support 失效
标题翻译：燃油组件结构使用通道进行负载支持
公开(公告)号：US5627866A
公开(公告)日：1997-05-06
申请号：US542382
申请日：1995-10-12
申请人： Thomas G. Dunlap , Robert B. Elkins , Christian D. Frederickson , Russell P. Higgins
发明人： Thomas G. Dunlap , Robert B. Elkins , Christian D. Frederickson , Russell P. Higgins
IPC分类号： G21C3/14 , G21C3/324 , G21C3/334 , G21C3/322
CPC分类号： G21C3/324 , G21C3/14 , G21C3/334 , G21Y2002/302 , G21Y2004/301 , Y02E30/40
摘要： A fuel assembly for a nuclear reactor vessel includes a plurality of fuel rods, at least one coolant rod, a lower tie plate supporting the fuel rods and coolant rod, and a channel surrounding the fuel rods, coolant rod and tie plate. The lower tie plate is supported by the channel such that the channel carries a load of the fuel assembly. In one aspect of the invention, an upper tie plate includes two spring loaded latch pins engageable with corresponding apertures in the channel. A transition member supports the lower tie plate and is rigidly secured to the channel. Thus, when lifting the fuel assembly from the reactor, the channel bears the load of the fuel assembly. End gussets or clips are welded to the channel and inserted into the transition member, which serve as a secondary support for the transition member in the event that its primary connection to the channel fails. A channel guide member is secured to the, upper tie plate and includes two ears that are received in ear apertures in the channel. The channel guide and ears thus provide a redundant attachment between the tie plate and the channel in the event that the spring loaded latch pins fail. If it is desired to remove the fuel bundle from the channel, the upper tie plate is released from the assembly by detaching the guide member and releasing the spring loaded latch pins. The bundle can then be removed from the channel by attaching a grapple head to the coolant rod ends, which are specially shaped to facilitate an attachment tool.
摘要翻译：用于核反应堆容器的燃料组件包括多个燃料棒，至少一个冷却剂棒，支撑燃料棒和冷却剂棒的下部连接板以及围绕燃料棒，冷却剂棒和连接板的通道。下连接板由通道支撑，使得通道承载燃料组件的负载。在本发明的一个方面，上连接板包括可与通道中的相应孔接合的两个弹簧加载的闩锁销。过渡构件支撑下连接板并且刚性地固定到通道。因此，当将燃料组件从反应器提升时，通道承受燃料组件的负载。端部角撑板或夹子焊接到通道并插入到过渡构件中，在过渡构件的主要连接失败的情况下，过渡构件用作过渡构件的辅助支撑。通道引导构件固定到上连接板，并且包括容纳在通道中的耳孔中的两个耳朵。如果弹簧加载的闩锁销故障，则通道引导件和耳朵因此提供了连接板和通道之间的冗余连接。如果希望从通道中去除燃料束，则通过分离引导构件并释放弹簧加载的闩锁销，上部联接板从组件中释放。然后可以通过将抓斗头附接到冷却剂杆端部而将束从通道移除，冷却剂杆端部被特别成形以便于附接工具。

52. 发明授权

US5309491A Fuel assembly with secured rod ends at the foot 失效
公开(公告)号：US5309491A
公开(公告)日：1994-05-03
申请号：US33590
申请日：1993-03-18
申请人： Hans-Joachim Lippert , Werner Meier
发明人： Hans-Joachim Lippert , Werner Meier
IPC分类号： G21C3/324 , G21C3/32 , G21C3/322 , G21C3/33 , G21C21/00 , G21C3/30
CPC分类号： G21C3/32 , G21C3/322 , Y02E30/31 , Y02E30/38
摘要： In a fuel assembly, lower end pieces of fuel rods, guide tubes and coolant pipes, etc., are inserted and/or screwed into a base plate and secured against lifting by a bolt. In the case of fuel rods, in particular fuel rods which do not extend over the entire length of normal rods, the bolt is screwed onto connecting parts in such a way that a releasable bayonet closure is produced. In the case of coolant pipes of boiling water reactors, there is provided in particular a screw connection which is irreleasably secured against torsion by the bolt.

53. 发明授权

US5304261A Method of fabricating a channel box or other part for a nuclear reactor 失效
标题翻译：制造核反应堆通道箱或其他部件的方法
公开(公告)号：US5304261A
公开(公告)日：1994-04-19
申请号：US913468
申请日：1992-07-15
申请人： Nobukazu Yamamoto , Kouichi Matsumoto , Junjiro Nakajima , Hideo Maki , Hiromasa Hirakawa , Masahisa Inagaki , Iwao Takase , Nobuhiro Okazaki , Hideaki Ishizaki , Toraki Sakuma
发明人： Nobukazu Yamamoto , Kouichi Matsumoto , Junjiro Nakajima , Hideo Maki , Hiromasa Hirakawa , Masahisa Inagaki , Iwao Takase , Nobuhiro Okazaki , Hideaki Ishizaki , Toraki Sakuma
IPC分类号： C22F1/00 , C22F1/18 , C23F1/02 , G21C3/324 , G21C21/00
CPC分类号： G21C3/324 , C23F1/02 , G21Y2002/103 , G21Y2002/302 , G21Y2004/201 , G21Y2004/40 , Y02E30/40
摘要： In a method of fabricating a channel box for use in a nuclear reactor, Zr-alloy sheet material is formed into a tubular channel box. The method includes solution heat treatment of the Zr-alloy sheet material including quenching from a temperature at which .beta.-phase is present. After the solution heat treatment, portions of the Zr-alloy sheet are thinned relative to other portions by a non-stressing thinning process, such as chemical etching in a bath. The corrosion resistance imparted by heat treatment is retained, and the heat treatment itself is easily performed on material of uniform thickness.
摘要翻译：在制造用于核反应堆的通道箱的方法中，将Zr合金板材形成为管状通道箱。该方法包括：从存在（β）相的温度淬火的Zr合金片材的固溶热处理。在固溶热处理之后，通过非应力变薄处理，例如在浴中的化学蚀刻，Zr合金板的部分相对于其它部分变薄。通过热处理赋予的耐腐蚀性得到保持，并且易于对厚度均匀的材料进行热处理。

54. 发明授权

US5253278A Fuel assembly, channel box, production method of channel box, and core of nuclear reactor 失效
标题翻译：燃料组件，通道箱，通道箱的生产方法和核反应堆的核心
公开(公告)号：US5253278A
公开(公告)日：1993-10-12
申请号：US705723
申请日：1991-05-24
申请人： Toru Kanazawa , Osamu Yokomizo , Shin-ichi Kashiwai , Akihito Orii , Koji Nishida , Tatsuo Hayashi , Junjiro Nakajima
发明人： Toru Kanazawa , Osamu Yokomizo , Shin-ichi Kashiwai , Akihito Orii , Koji Nishida , Tatsuo Hayashi , Junjiro Nakajima
IPC分类号： G21C3/324 , G21C3/33 , G21C3/332 , G21C5/18 , G21C21/00 , G21C3/32
CPC分类号： G21C3/324 , G21C3/332 , G21Y2002/303 , G21Y2004/30 , Y02E30/40
摘要： A fuel assembly included a plurality of fuel rods, fuel spacers for maintaining gaps between the fuel rods and a channel box. The channel box includes spacer support portions projecting inwardly from an inner surface of the channel box and supporting the fuel spacer in a transverse direction and creep deformation inhibition portions disposed at the lower end portion of the channel box and projecting inwardly. The distance between the spacer support portions disposed to oppose one another in a horizontal direction is smaller than the distance between the creep deformation inhibition portions opposing one another in the horizontal direction.

55. 发明授权

US5143691A Fuel assembly with flow tripper for a boiling water reactor 失效
标题翻译：燃油组件，带沸水反应堆的流量跳闸器
公开(公告)号：US5143691A
公开(公告)日：1992-09-01
申请号：US619903
申请日：1990-11-28
申请人： Hans-Joachim Lippert , Wendelin Kraemer
发明人： Hans-Joachim Lippert , Wendelin Kraemer
IPC分类号： G21C3/324 , G21C3/322 , G21C3/334
CPC分类号： G21C3/322 , G21Y2002/201 , G21Y2004/30 , G21Y2004/302 , Y02E30/31 , Y02E30/38
摘要： A fuel assembly for a boiling water reactor includes an elongated case having an interior and inner surfaces. A base part has inlet openings discharging into the interior of the case for coolant flowing in a given flow direction and a head part has outlet openings leading out of the interior of the case for the coolant flowing in the given flow direction. Mutually parallel fuel rods containing nuclear fuel are disposed in the case between the base and head parts. The inner surfaces of the case have a profile with a rectilinear alignment as seen in the given flow direction and flow trippers extending transversely to the alignment in the form of bulges protruding inward in the given flow direction. Each of the bulges has a sloped surface facing toward the coolant with an impact surface substantially perpendicular to the given flow direction.
摘要翻译：用于沸水反应器的燃料组件包括具有内表面和内表面的细长壳体。基座部分具有排放到壳体内部的入口开口，用于沿给定流动方向流动的冷却剂，并且头部具有引导出壳体内部的出口，以使冷却剂沿给定的流动方向流动。包含核燃料的相互平行的燃料棒设置在基部和头部之间的壳体中。壳体的内表面具有在给定流动方向上看到的直线对准的轮廓，并且在给定流动方向上以向内突出的凸起的形式横向延伸的流动跳闸。每个凸起具有面向冷却剂的倾斜表面，其具有基本上垂直于给定流动方向的冲击表面。

56. 再颁专利

USRE33818E Axially shaped channel and integral flow trippers 失效
公开(公告)号：USRE33818E
公开(公告)日：1992-02-11
申请号：US534812
申请日：1990-06-06
申请人： Russell L. Crowther, Jr. deceased , Eric B. Johansson , Bruce Matzner
发明人： Russell L. Crowther, Jr. deceased , Eric B. Johansson , Bruce Matzner
IPC分类号： G21C3/322 , G21C3/324
CPC分类号： G21C3/324 , G21C3/322 , G21Y2002/201 , G21Y2004/30 , G21Y2004/305 , Y02E30/40
摘要： An improved channel is disclosed which has a reduced average thickness in its upper portion. The lesser average thickness corresponds to a lower pressure difference acting on the channel sides, over the upper portion of the channel. The reduction in average thickness is accomplished by cutting flow trippers into the inner surface of the channel walls and/or cutting grooves into the outer surface of the channel. The axial variation of channel average thickness increases water volume adjacent to the upper part of the channel to provide increased neutron moderation, to minimize the steam void reactivity coefficient, and to provide a greater cold shutdown margin. The material removed to produce the flow trippers increases the cross-sectional area inside the channel and reduces pressure drop in the upper portion of the channel. The flow trippers divert water flowing on the channel walls to the fuel rods adjacent to the channel walls, permitting higher reactor power operation. The flow trippers also permit operation at lower flow rates.

57. 发明授权

US4889684A Hydraulic reinforcement of channel at lower tie-plate in BWR fuel bundle 失效
标题翻译： BWR燃料束下层平台通道液压加固
公开(公告)号：US4889684A
公开(公告)日：1989-12-26
申请号：US226482
申请日：1988-08-01
申请人： Eric B. Johansson
发明人： Eric B. Johansson
IPC分类号： G21C3/324 , G21C3/33
CPC分类号： G21C3/324 , G21Y2002/201 , G21Y2004/30 , G21Y2004/302 , Y02E30/40
摘要： In a nuclear boiling water reactor, an improved lower tie-plate and fuel channel interface for a boiling water reactor fuel bundle is disclosed. The fuel bundle has a lower tie-plate for supporting fuel rods and permitting the introduction of fluid interior of the fuel bundle. An upper tie-plate maintains the lower tie-plate supported rods in side-by-side relation and has apertures for discharging a mixture of water and steam. The fuel rods extend between the tie-plates for the generation of steam with some of the fuel rods forming a threaded connection fastening the tie-plates together. A polygon sectioned channel, preferably square, surrounds the tie-plates and fuel rods for the confining of fluid flow between the tie-plates interior of the bundle. The interface of the channel as it surrounds the lower tie-plate is reconfigured. This reconfiguration includes means for inducing a rapid pressure drop from the interior juncture of the lower tie-plate and channel to and towards the exterior juncture of the lower tie-plate and channel. Because of this rapid pressure drop the bottom portion of the square sectioned channel is not subject to the pressure loading, and the bottom portion reinforces the upper portion. In one embodiment, a labyrinth seal configuration is made in the region of overlap between channel and the lower tie-plate, consisting of intermittent interruptions of an otherwise constant flow area between the lower tie-plate channel. The labyrinth seal is disclosed as configured either in the lower tie-plate or channel.In a second, preferred embodiment, a diffuser is incorporated in the region of overlap between the channel and lower tie-plate. The diffuser causes a pressure distribution in the overlap region which limits the deflection of the channel.
摘要翻译：在核沸水反应器中，公开了一种用于沸水反应堆燃料束的改进的下连接板和燃料通道界面。燃料束具有用于支撑燃料棒的下连接板并且允许引入燃料束的流体内部。上连接板将下连接板支撑杆并排维持，并具有用于排出水和蒸汽混合物的孔。燃料棒在连接板之间延伸以产生蒸汽，其中一些燃料棒形成将连接板紧固在一起的螺纹连接。多边形分段通道，优选是正方形的，围绕着连接板和燃料棒，用于限制束的内部板之间的流体流动。重新配置围绕下连接板的通道的接口。这种重新配置包括用于从下连接板和通道的内部接合点引导到下连接板和通道的外部接合端并朝向下连接板和通道的外部接合处的快速压降的装置。由于这种快速的压降，方形截面通道的底部不受压力负荷的影响，并且底部加强了上部。在一个实施例中，在通道和下连接板之间的重叠区域中形成迷宫式密封构造，其由在下连接板通道之间的其它恒定流动区域的间歇性中断构成。公开了迷宫式密封件，其配置在下连接板或通道中。在第二个优选实施例中，扩散器被结合在通道和下连接板之间的重叠区域中。扩散器在重叠区域中引起压力分布，这限制了通道的偏转。

58. 发明授权

US4767595A Repositioned fuel assembly 失效
标题翻译：重新定位的燃料组件
公开(公告)号：US4767595A
公开(公告)日：1988-08-30
申请号：US49897
申请日：1987-05-15
申请人： Richard A. Wolters, Jr. , Mark J. Colby , Robert B. Elkins
发明人： Richard A. Wolters, Jr. , Mark J. Colby , Robert B. Elkins
IPC分类号： G21C3/33 , G21C3/324 , G21C3/334 , G21C5/02 , G21C5/06 , G21C7/00 , G21C15/00
CPC分类号： G21C7/00 , G21C3/324 , G21C5/02 , G21C3/334 , G21Y2002/201 , G21Y2004/30 , G21Y2004/40 , Y02E30/31 , Y02E30/39
摘要： In a boiling water reactor (BWR) of the D-lattice type an improved apparatus and method for the mounting of a nuclear fuel assembly is disclosed. Specifically, a D-lattice nuclear fuel assembly is diagonally displaced at the top and diagonally displaced at the bottom to and toward the cruciform shaped control rod interstices. Displacement at the bottom end of the nuclear fuel assembly occurs by an eccentrically centered lower tie plate and fluid inlet for fitting to the core plate at the bottom end of the assembly. Displacement at the top end of the nuclear fuel assembly occurs by shims in the vicinity of the upper end of the channel at the top guides. The disclosed channel assembly is capable of installation during refueling cycles, with a displaced channel being substituted for prior art conventional D-lattice channels. Substitution of one displaced channel occurs with each refueling cycle in a group of four channels. Consequently, there results at the end a maximum of four refueling cycles, complete installation of the displaced channels. As substitution occurs, there results an improved worth of each fuel channel assembly enabling an eventual aggregate 2% increase in life with resultant savings.
摘要翻译：公开了一种用于安装核燃料组件的改进的装置和方法，在D-晶格型沸水反应器（BWR）中。具体地说，D格子核燃料组件在顶部是斜对位移的，并且在底部向对角线位移并且朝向十字形控制棒间隙。在核燃料组件的底端的位移由偏心中心的下连接板和流体入口发生，用于在组件的底端装配到芯板。在核燃料组件的顶端的位移通过在顶部引导件处的通道的上端附近的垫片发生。所公开的通道组件能够在加油循环期间安装，其中替换通道代替现有技术的常规D-晶格通道。在一组四个通道中的每个加油循环中，替换一个位移通道。因此，最终导致最多四个加油循环，完全安装排水通道。随着替代发生，每个燃料通道组件的价值得到改善，从而最终总体上增加了2％的增长，从而节约了成本。

59. 发明授权

US4764340A Fuel assembly stress relieving fastener 失效
标题翻译：燃油组件应力消除紧固件
公开(公告)号：US4764340A
公开(公告)日：1988-08-16
申请号：US925766
申请日：1986-10-31
申请人： Chun K. Lui , Leonard T. Gesinski
发明人： Chun K. Lui , Leonard T. Gesinski
IPC分类号： G21C3/30 , G21C3/324 , G21C3/32
CPC分类号： G21C3/324 , Y02E30/40 , Y10T403/217 , Y10T403/27 , Y10T403/4941
摘要： A device for relieving thermally induced stresses developed in a nuclear fuel assembly during reactor heatup is disclosed herein. The device generally comprises a stress relieving fastener capable of connecting a fuel assembly top nozzle, which may be stainless steel, to a threaded stud, which may be Zircaloy. The stud is attached to a fuel assembly channel. The fastener includes a threaded nut having a deformable portion for relieving thermally induced stresses developed in the stud by the differential thermal expansion of the top nozzle and stud. In a first embodiment of the nut, the deformable portion comprises a circumferential, deformable ridge which is substantially recessed from the marginal edge of the nut and which is disposed on the bottom most surface of the nut. The ridge contacts the top nozzle when the nut threadedly engages the stud. A second embodiment of the nut is similar to the first embodiment except that the deformable ridge is disposed flush with the marginal edge of the nut. The deformable portion in the second embodiment may also include a circumferential, deformable first groove which is formed in the lower portion of the nut. In addition, the second embodiment may include a deformable second groove formed in the bottom most surface of the nut. During reactor heatup, thermally induced stresses may develop in the stud. The deformable portion of the nut deforms, thereby relieving the thermally induced stresses.
摘要翻译：本文公开了一种用于在反应器加热期间释放在核燃料组件中产生的热致应力的装置。该装置通常包括能够将可以是不锈钢的燃料组件顶部喷嘴连接到可以是Zircaloy的螺柱的应力释放紧固件。螺柱连接到燃料组件通道。紧固件包括具有可变形部分的螺纹螺母，用于通过顶部喷嘴和螺柱的差动热膨胀来减轻在螺柱中产生的热致应力。在螺母的第一实施例中，可变形部分包括周向可变形的脊，其从螺母的边缘部分基本上凹进，并且设置在螺母的最底部表面上。当螺母螺纹接合螺柱时，脊与顶部喷嘴接触。螺母的第二实施例类似于第一实施例，除了可变形凸脊与螺母的边缘边缘平齐。第二实施例中的可变形部分还可以包括形成在螺母的下部中的周向可变形的第一凹槽。此外，第二实施例可以包括形成在螺母的最底部表面中的可变形的第二凹槽。在反应堆加热期间，螺柱中会产生热致应力。螺母的可变形部分变形，从而减轻热致应力。

60. 发明授权

US4587091A Nuclear fuel assembly 失效
标题翻译：核燃料组件
公开(公告)号：US4587091A
公开(公告)日：1986-05-06
申请号：US365093
申请日：1982-04-02
申请人： Yoshio Watari
发明人： Yoshio Watari
IPC分类号： G21C3/324 , G21C3/30
CPC分类号： G21C3/324 , Y02E30/40
摘要： A nuclear fuel assembly suitable for use in fast breeders. The fuel assembly has a wrapper tube and a plurality of fuel elements contained in the wrapper tube, each fuel element having a clad tube. The wrapper tube is made of a material which exhibits a larger rate of swelling by neutron irradiation than the material of the clad tube. For instance, the wrapper tube is made of an austenitic stainless steel, and the clad tube is made of an austenitic Ni alloy having a high Ni content. According to this arrangement, it is possible to avoid undesirable contact between the clad tube and the wrapper tube in the last period of the life time of the nuclear fuel.
摘要翻译：适用于快速育种者的核燃料组件。燃料组件具有包装管和容纳在包装管中的多个燃料元件，每个燃料元件具有包层管。包裹管是由中子照射比包层管的材料表现出较大的膨胀率的材料制成的。例如，包裹管由奥氏体不锈钢制成，复合管由具有高Ni含量的奥氏体Ni合金制成。根据该结构，能够避免在核燃料的使用寿命的最后期间包层管与包裹管的不良接触。

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