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81. 发明授权

US4576786A Partial grid for a nuclear reactor fuel assembly 失效
标题翻译：用于核反应堆燃料组件的部分电网
公开(公告)号：US4576786A
公开(公告)日：1986-03-18
申请号：US564049
申请日：1983-12-21
申请人： Edmund E. DeMario
发明人： Edmund E. DeMario
IPC分类号： G21C3/34 , G21C3/32 , G21C3/322 , G21C3/356
CPC分类号： G21C3/3563 , G21C3/32 , G21C3/322 , G21C2003/3432 , G21C3/356 , G21Y2002/201 , G21Y2002/302 , G21Y2004/30 , Y02E30/38
摘要： A partial grid structure is provided for a nuclear reactor fuel assembly for selectively mounting either means for deflecting the upwardly flowing coolant or means for laterally supporting the fuel rods, or both, to substantially eliminate localized neutron flux peaking and thereby increasing the power output of the assembly. The grid structure extends across only a portion of the fuel assembly and is associated with a selective group of fuel rods defined by a predetermined number of the fuel rods contained within the fuel assembly. The grid straps form an egg-crate configuration creating cell openings for receiving the fuel rods of a predetermined fuel rod group. In an alternate embodiment, the fuel rods of the fuel assembly are partitioned into separate groups by the use of separate partial grid structures which are combined to form a grid structure assembly.
摘要翻译：提供了用于核反应堆燃料组件的部分网格结构，用于选择性地安装用于偏转向上流动的冷却剂的装置或用于侧向支撑燃料棒或两者的装置，以基本上消除局部中子通量峰值，从而增加部件。格栅结构仅延伸穿过燃料组件的一部分，并且与由燃料组件中包含的预定数量的燃料棒限定的选择性组的燃料棒相关联。网格带形成蛋箱配置，产生用于接收预定燃料棒组的燃料棒的电池开口。在替代实施例中，燃料组件的燃料棒通过使用组合以形成网格结构组件的单独的部分网格结构而被划分成单独的组。

82. 发明授权

US4557892A Nuclear fuel element 失效
标题翻译：核燃料元素
公开(公告)号：US4557892A
公开(公告)日：1985-12-10
申请号：US467801
申请日：1983-02-18
申请人： Sei-ichi Komoda
发明人： Sei-ichi Komoda
IPC分类号： G21C3/17 , G21C3/338 , G21C3/18 , G21C3/32
CPC分类号： G21C3/17 , G21C3/338 , Y02E30/40
摘要： A nuclear fuel element suitable for use in fast breeder. The fuel element has a clad tube and a wire spacer wound round the clad tube. The clad tube of the fuel element is composed of a first clad tube and a second clad tube which are connected to each other through an intermediate plug. The first clad tube extends upwardly from the intermediate plug. The upper end of the first clad tube is closed by an upper end plug, while the lower end of the second clad tube is closed by a lower end plug. The first clad tube is charged with a multiplicity of fuel pellets, while the second clad tube defines a gas plenum therein. The spaces inside the first and second clad tubes are communicated with each other through vent holes formed in the intermediate plug. The wire spacer is wound round the first clad tube and is fixed at its one end to the end plug attached to the first clad tube and at its other end to the intermediate plug.
摘要翻译：适用于快速繁殖者的核燃料元件。燃料元件具有围绕包层管的包层管和线间隔件。燃料元件的复合管由通过中间塞相互连接的第一复合管和第二包层管构成。第一复合管从中间塞子向上延伸。第一复合管的上端由上端塞封闭，而第二复合管的下端由下端塞封闭。第一包层管装有多个燃料颗粒，而第二包层管在其中限定气室。第一和第二包层管内的空间通过形成在中间塞中的通气孔相互连通。线间隔件缠绕在第一复合管上，并且其一端固定到附接到第一复合管的端塞，并且在另一端固定到中间塞。

83. 发明授权

US4420457A Fuel assembly 失效
标题翻译：燃油组件
公开(公告)号：US4420457A
公开(公告)日：1983-12-13
申请号：US303673
申请日：1981-09-18
申请人： Jacques Le Pargneux
发明人： Jacques Le Pargneux
IPC分类号： G21C3/33 , G21C3/32
CPC分类号： G21C3/32 , G21Y2004/30 , Y02E30/40
摘要： The object of the invention is a nuclear reactor fuel assembly including fuel elements arranged in a supporting frame comprising two endpieces, the upper (1) and the lower (2) respectively, to which are attached the ends of a plurality of vertical tubes (3), each endpiece 1(2) including a plane base 11(21) in which are arranged two series of orifices 7 for retaining the tubes (3) and for the flow of the cooling fluid.In accordance with the invention the base (11,21) of each endpiece (1,2) is joined side by side with an inner plate (15,25) equipped with the same series of orifices (70) for retaining the tubes (3) and for the flow of the fluid, and the orifices (70) have an oblong cross-section and are equipped with parts for attachment which cooperate with corresponding parts (31) for attachment of the said tubes (3) by transverse displacement of the inner plate.
摘要翻译：本发明的目的是一种核反应堆燃料组件，其包括布置在支撑框架中的燃料元件，该支撑框架包括两个端部，分别具有上端（1）和下端（2），多个垂直管（3）），每个端件1（2）包括平面基座11（21），其中布置有两个用于保持管（3）和用于冷却流体流动的一系列孔口7。根据本发明，每个端件（1,2）的底座（11,21）并排连接有内板（15,25），所述内板（15,25）装备有用于保持管（3）的相同系列的孔（70））和流体的流动，并且孔（70）具有长方形横截面并且配备有用于附接的部件，其与相应部件（31）配合，用于通过横向移位所述管（3）来附接所述管内板。

84. 发明授权

US4344915A Nuclear reactor fuel rod attachment system 失效
标题翻译：核反应堆燃料棒附件系统
公开(公告)号：US4344915A
公开(公告)日：1982-08-17
申请号：US187913
申请日：1980-09-17
申请人： David W. Christiansen
发明人： David W. Christiansen
IPC分类号： G21C3/33 , G21C3/32
CPC分类号： G21C3/33 , Y02E30/40
摘要： A reusable system for removably attaching a nuclear reactor fuel rod (12) to a support member (14). A locking cap (22) is secured to the fuel rod (12) and a locking strip (24) is fastened to the support member (14). The locking cap (22) has two opposing fingers (24a and 24b) shaped to form a socket having a body portion (26). The locking strip has an extension (36) shaped to rigidly attach to the socket's body portion (26). The locking cap's fingers are resiliently deflectable. For attachment, the locking cap (22) is longitudinally pushed onto the locking strip (24) causing the extension (36) to temporarily deflect open the fingers (24a and 24b) to engage the socket's body portion (26). For removal, the process is reversed.
摘要翻译：一种用于将核反应堆燃料棒（12）可拆卸地连接到支撑构件（14）的可重复使用的系统。锁定帽（22）固定到燃料棒（12）上，并且锁定条（24）被紧固到支撑构件（14）。锁定帽（22）具有形成为形成具有主体部分（26）的插座的两个相对的指状物（24a和24b）。锁定条具有形状成刚性地附接到插座主体部分（26）的延伸部（36）。锁定帽的手指可弹性偏转。为了附接，锁定帽（22）被纵向推到锁定条（24）上，使得延伸部（36）暂时偏转打开手指（24a和24b）以接合插座的主体部分（26）。为了清除，该过程相反。

85. 发明授权

US4302294A Nuclear reactor fuel assemblies 失效
标题翻译：核反应堆燃料组件
公开(公告)号：US4302294A
公开(公告)日：1981-11-24
申请号：US37482
申请日：1979-05-09
申请人： Joseph Leclercq
发明人： Joseph Leclercq
IPC分类号： G21C3/33 , G21C3/32 , G21C3/332 , G21C3/30
CPC分类号： G21C3/332 , Y02E30/40
摘要： A nuclear reactor fuel assembly comprises a bundle of parallel rods which are transversely spaced by cross-pieces, and is supported by support tubes which extend between, and are fixed at their ends to, two grids. The grids have cells which are aligned with the fuel rods and through which the fuel rods can be withdrawn. The grids are detachably connected to end plates by sockets which are removably engaged in the end plates and cells of the grids.
摘要翻译：核反应堆燃料组件包括一束平行的杆，其横向间隔开横梁，并且由两个网格之间延伸并固定在其两端的支撑管支撑。电网具有与燃料棒对准的电池，燃料棒可通过该电池取出。栅格通过可拆卸地接合在网格的端板和单元中的插座可拆卸地连接到端板。

86. 发明授权

US4229258A Fuel assembly 失效
标题翻译：燃油组件
公开(公告)号：US4229258A
公开(公告)日：1980-10-21
申请号：US835962
申请日：1977-09-23
申请人： Renzo Takeda , Sadao Uchikawa , Kunitoshi Kurihara , Masaaki Yamamoto , Michiro Yokomi , Junichi Yamashita , Jun Takamatsu
发明人： Renzo Takeda , Sadao Uchikawa , Kunitoshi Kurihara , Masaaki Yamamoto , Michiro Yokomi , Junichi Yamashita , Jun Takamatsu
IPC分类号： G21C7/00 , G21C3/32 , G21C3/328 , G21C5/12 , G21C7/04 , G21C3/02
CPC分类号： G21C3/328 , G21C7/04 , G21C3/32 , G21Y2002/201 , G21Y2004/10 , G21Y2004/40 , Y02E30/31 , Y02E30/38 , Y02E30/39
摘要： A fuel assembly suitable for use in boiling water reactor. The fuel assembly has a specific pattern of distribution of enrichment, so that the upper region of the assembly has a larger infinite multiplication factor than that of the lower region. In an example, the distribution of enrichment is such that the upper region has a mean enrichment larger than that of the lower region, while, in another example, the mean enrichment is maintained constant over the length of the assembly but the difference of enrichments between the central and peripheral portions of a plane normal to the axis of the assembly is made smaller at the upper region than at the lower region.
摘要翻译：适用于沸水反应堆的燃料组件。燃料组件具有特定的浓缩分布模式，使得组件的上部区域具有比下部区域更大的无限倍增系数。在一个实例中，富集的分布使得上部区域的平均浓度大于下部区域的平均富集，而在另一个示例中，平均富集在组件的长度上保持恒定，但是浓度的差异垂直于组件的轴线的平面的中心和周边部分在上部区域比在下部区域处更小。

87. 发明授权

US4155807A Core and transition fuel assembly for a nuclear reactor 失效
标题翻译：核反应堆的核心和过渡燃料组件
公开(公告)号：US4155807A
公开(公告)日：1979-05-22
申请号：US725216
申请日：1976-09-22
申请人： Richard E. Schreiber , David J. Sperhac
发明人： Richard E. Schreiber , David J. Sperhac
IPC分类号： G21C1/08 , G21C3/32 , G21C3/34 , G21C3/356 , G21C5/00 , G21C3/30
CPC分类号： G21C3/32 , G21C3/3563 , Y02E30/40
摘要： A core and a transition fuel assembly for a nuclear reactor having a first fuel assembly including structure for laterally spacing parallel and coextending fuel rods positioned at preselected core elevations and also having a second fuel assembly including lateral spacing structure at preselected core elevations, at least one of which is different than the elevations of the spacing structure of the first fuel assembly. The transition fuel assembly is positioned between the first and second assemblies and includes lateral spacing structure positioned at each core elevation where the first and second fuel assemblies have a spacing structure. The transition fuel assembly ensures that contact among the fuel assemblies of the core is through the spacing structures.
摘要翻译：一种用于核反应堆的核心和过渡燃料组件，其具有第一燃料组件，该第一燃料组件包括用于横向间隔设置在预选核心高度处的平行和共同延伸的燃料棒的结构，并且还具有包括预选芯高度处的横向间隔结构的第二燃料组件，至少一个其不同于第一燃料组件的间隔结构的高度。过渡燃料组件定位在第一组件和第二组件之间，并且包括位于每个芯部高度处的侧向间隔结构，其中第一和第二燃料组件具有间隔结构。过渡燃料组件确保了芯的燃料组件之间的接触通过间隔结构。

88. 发明授权

US3953287A Assembly mechanism for nuclear fuel bundles 失效
标题翻译：核燃料束装配机制
公开(公告)号：US3953287A
公开(公告)日：1976-04-27
申请号：US386201
申请日：1973-08-06
申请人： John W. Long , Barney S. Flora
发明人： John W. Long , Barney S. Flora
IPC分类号： G21C3/33 , G21C3/32
CPC分类号： G21C3/3305 , G21C3/3315 , Y02E30/40
摘要： In a nuclear power reactor fuel bundle having tie rods fastened to a lower tie plate and passing through openings in the upper tie plate, the assembled bundle is secured by rotatable locking sleeves which engage slots provided in the upper tie plate. Pressure exerted by helical springs mounted around each of the fuel rods urge the upper tie plate against the locking sleeves. The bundle may be disassembled after depressing the upper tie plate and rotating the locking sleeves to the unlocked position.
摘要翻译：在具有紧固到下连接板并且穿过上连接板中的开口的拉杆的核动力堆燃料束中，组装的束通过与设置在上连接板中的槽接合的可旋转锁定套固定。安装在每个燃料棒周围的螺旋弹簧施加的压力促使上连接板抵靠锁定套筒。在按压上连接板并将锁定套筒旋转到未锁定位置之后，可以拆卸捆。

89. 发明授权

US3816247A Nuclear fuel assembly, especially for a fast reactor 失效
标题翻译：核燃料组件，特别是快速反应堆
公开(公告)号：US3816247A
公开(公告)日：1974-06-11
申请号：US25754972
申请日：1972-05-30
申请人： COMMISSARIAT ENERGIE ATOMIQUE
发明人： CAYOL A , CHENAL J , SKOK J , VENOBRE H , CLOTTES G , SCHALLER K
IPC分类号： G21C3/324 , G21C3/32
CPC分类号： G21C3/324 , Y02E30/40
摘要： The fuel assembly comprises at least one bundle of parallel fuel pins disposed on a uniform lattice within a pressure-resistant outer prismatic sleeve which has a polygonal cross-section and through which a coolant is circulated. Curvature of the sleeve produced by swelling under intense irradiation is limited by means of slots which are cut across the dihedrons formed by the sleeve faces. A thin-walled jacket which guides the coolant flow within the fuel bundle and withstands vertical handling stresses is placed between the bundle and the sleeve with provision for a clearance which permits expansion of the jacket under the action of differential pressure.
摘要翻译：燃料组件包括设置在耐压外部棱柱形套筒内的均匀格子上的至少一束平行燃料销，其具有多边形横截面并且冷却剂通过该横截面循环。

90. 发明授权

US3801453A Fuel assembly for power generating nuclear reactor 失效
标题翻译：发电核燃料燃料组件
公开(公告)号：US3801453A
公开(公告)日：1974-04-02
申请号：US3801453D
申请日：1972-02-11
申请人： TRANSFER SYSTEMS
发明人： JONES C
IPC分类号： G21C3/33 , G21C3/334 , G21C3/32
CPC分类号： G21C3/334 , G21C3/33 , Y02E30/40
摘要： A fuel assembly especially adapted for a pressurized water reactor is described. It comprises a support assembly of control element guide tubes, upper and lower end fittings, and grid spacers holding a plurality of fuel rods in vertical parallel relation. The fuel assembly features a removable upper end fitting allowing on-site access to and removal of individual fuel rods, and a novel guide tube construction providing high volume coolant flow through the assembly and allowing ready access of a grapple having laterally, outwardly extending gripping fingers to the assembly for lifting purposes.

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