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1. 发明公开

US20230197297A1 SPACER GRID OF NUCLEAR FUEL ASSEMBLY 审中-公开
公开(公告)号：US20230197297A1
公开(公告)日：2023-06-22
申请号：US16981182
申请日：2019-11-04
申请人： KEPCO NUCLEAR FUEL CO., LTD.
发明人： Joo Young Ryu , Chae Young Nam , Han Gil Woo , Nam Gyu Park
IPC分类号： G21C3/356 , G21C3/344 , G21C3/34
CPC分类号： G21C3/356 , G21C3/344 , G21C3/3432 , G21C3/3424
摘要： Proposed is a spacer grid of a nuclear fuel assembly that may be manufactured using 3D printing with a high degree of design freedom, excluding sheet metal processing and welding processing. The spacer grid of the nuclear fuel assembly has hollow grid cells (110) having inner walls (111) arranged in a square lattice structure and connected to each other by being circumscribed, each of the grid cells including: a plurality of elastic support portions (112) protrudingly provided by being curved inwardly from the inner walls (111) and elastically supporting a fuel rod (10) in a state in which at least three elastic support portions are disposed at equal angles; and a plurality of inner mixing vanes (113) protrudingly provided while each upper tip portion thereof spirally turns along an associated one of the inner walls above the elastic support portions (112).

2. 发明申请

US20100322371A1 OPTIMIZED FLOWER TUBES AND OPTIMIZED ADVANCED GRID CONFIGURATIONS 审中-公开
标题翻译：优化的花管和优化的高级配置
公开(公告)号：US20100322371A1
公开(公告)日：2010-12-23
申请号：US12871079
申请日：2010-08-30
申请人： XIAOYAN (JANE) JIANG , YIBAN XU , Z. E. KAROUTAS
发明人： XIAOYAN (JANE) JIANG , YIBAN XU , Z. E. KAROUTAS
IPC分类号： G21C3/344
CPC分类号： G21C3/356 , G21C3/344 , G21C3/352 , Y02E30/40
摘要： A support grid for a nuclear fuel assembly, the fuel rod assembly having a generally cylindrical fuel rod with a diameter, wherein the support grid includes a frame assembly having a plurality of outer straps and a plurality tubular members and/or helical frame members. The tubular members/helical frame members have a contact portion structured to contact an adjacent helical frame member and at least one helical fuel rod contact portion with a lesser diameter. The lesser diameter is generally equivalent to the fuel rod diameter such that a fuel rod disposed in the helical frame member would engage the inner helical frame member at helical fuel rod contact portion. The helical fuel rod contact portion may have a variable pitch.
摘要翻译：用于核燃料组件的支撑格栅，燃料棒组件具有直径为大致圆柱形的燃料棒，其中支撑格栅包括具有多个外带和多个管状构件和/或螺旋框架构件的框架组件。管状构件/螺旋框架构件具有被构造成接触相邻的螺旋框架构件和至少一个具有较小直径的螺旋式燃料棒接触部分的接触部分。较小的直径通常等于燃料棒直径，使得设置在螺旋形框架构件中的燃料棒将以螺旋形燃料棒接触部分接合内部螺旋形框架构件。螺旋燃料棒接触部分可以具有可变的间距。

3. 发明授权

US5875223A Spacer for a nuclear fuel assembly and a nuclear fuel assembly 失效
标题翻译：核燃料组件和核燃料组件的间隔件
公开(公告)号：US5875223A
公开(公告)日：1999-02-23
申请号：US841400
申请日：1997-04-30
申请人： Olov Nylund
发明人： Olov Nylund
IPC分类号： G21C3/344
CPC分类号： G21C3/344 , G21Y2002/201 , G21Y2002/303 , G21Y2004/30 , Y02E30/40
摘要： A spacer for retaining and positioning elongated elements at one or a plurality of levels in a nuclear reactor fuel assembly comprises a grid structure of joined-together sleeve cells. A coolant is adapted to flow upwards through the fuel assembly. The majority of the sleeve cells are provided with an upstream edge with a waveform. The edge is waveformed in such a way that the upwardly flowing coolant first encounters a peak of the wave which is disposed between the joints of the sleeves and thereafter a valley of the wave which is disposed at the joints of the sleeves. The peaks are arranged closer to a center of the sleeve cell than the valleys. Between the peaks and valleys, oblique edges are formed.
摘要翻译：用于在核反应堆燃料组件中的一个或多个水平面处保持和定位细长元件的间隔件包括连接在一起的套筒单元的格栅结构。冷却剂适于向上流过燃料组件。大多数套管单元设置有具有波形的上游边缘。该边缘以这样的方式波形，使得向上流动的冷却剂首先遇到设置在套筒的接头之间的波的峰部，此后设置在套筒的接头处的波谷。峰比布谷更靠近套筒细胞的中心。在峰谷之间形成斜边。

4. 发明授权

US5815545A Nuclear fuel assembly spacer and spring 失效
标题翻译：核燃料组件垫片和弹簧
公开(公告)号：US5815545A
公开(公告)日：1998-09-29
申请号：US802559
申请日：1997-02-19
申请人： Eric B. Johansson
发明人： Eric B. Johansson
IPC分类号： G21C3/344 , G21C3/356 , G21C3/34
CPC分类号： G21C3/356 , G21C3/344 , G21Y2002/302 , G21Y2004/30 , Y02E30/40
摘要： The ferrule spacer includes a ferrule having an elongated slot with a pair of tabs projecting laterally into the slot. An elongated spring has opposite ends bearing against the interior wall of the ferrule and flats overlying the tabs along the outside of the ferrule. The mid-span portion of the spring projects in a central aperture between the ferrule tabs for biased bearing engagement against the fuel rod. The fuel rod is maintained against oppositely disposed stops formed on the ferrule. The spring is inserted and removed from the inside of the ferrule.
摘要翻译：套圈间隔件包括具有细长槽的套圈，其具有横向地突出到槽中的一对翼片。细长的弹簧具有相对的端部，其抵靠套圈的内壁并且沿着套圈的外侧覆盖突片。弹簧的中跨部分突出在套圈突片之间的中心孔中，用于与燃料棒的偏置轴承接合。燃料棒保持在形成在套圈上的相对设置的止动件上。弹簧从套圈的内部插入和取出。

5. 发明授权

US5247551A Spacer sleeve for nuclear fuel assembly 失效
标题翻译：核燃料组件的隔离套管
公开(公告)号：US5247551A
公开(公告)日：1993-09-21
申请号：US764585
申请日：1991-09-24
申请人： Leo F. van Swam
发明人： Leo F. van Swam
IPC分类号： G21C3/336 , G21C3/344
CPC分类号： G21C3/344 , G21C3/336 , G21Y2002/101 , G21Y2002/104 , G21Y2002/303 , G21Y2004/30 , Y02E30/40
摘要： A spacer sleeve for positioning and restraining a nuclear fuel rod in a nuclear fuel assembly, having a thin walled tubular member having an inner wall and an outer end, and extending a height from a lower end to an upper end and being positioned around the fuel rod to form an unrestricted coolant flow passage along the height of the tubular member, the flow passage having a cross-sectional flow area formed between the fuel rod cladding and the inner wall of the tubular member, and a thin tab extending from the tubular member into the unrestricted flow area and secured to a portion of the cladding of the fuel rod.

6. 发明授权

US5209899A Composite spacer with inconel grid and zircaloy band 失效
标题翻译：复合间隔器带有丝网和ZIRCALOY带
公开(公告)号：US5209899A
公开(公告)日：1993-05-11
申请号：US754825
申请日：1991-09-04
申请人： Eric B. Johansson , Bruce Matzner , Gerald M. Latter
发明人： Eric B. Johansson , Bruce Matzner , Gerald M. Latter
IPC分类号： G21C3/34 , G21C3/344 , G21C3/348
CPC分类号： G21C3/348 , G21C3/3424 , G21C3/344 , G21Y2002/201 , G21Y2002/302 , G21Y2002/303 , G21Y2002/304 , G21Y2004/30 , Y02E30/40
摘要： An improved spacer is disclosed which contains an Inconel grid and a Zircaloy surrounding band. The Inconel grid can be fabricated from the extremely thin and highly elastic spring metal utilizing a modification of a prior art cell construction that includes paired inwardly bent vertical spring legs with cantilevered and rod encircling upper and lower arm pairs The spring legs extend at spaced apart locations between the upper and lower arm pairs and have a medial spring rod contacting portion for biasing the rods into stops on the rod encircling arm pairs. The springs at the upper and lower ends are provided with spring dimple stops to prevent over stressing of the spring during assembly or handling of the fuel bundle into which the spacer is incorporated. The rod encircling arm pairs have an offset from center where the two arms meet at their distal ends to complete encirclement of the rods. This offset from center enables the cells to be fastened in cell pairs at their respective embracing arms. The cell pairs can in turn be manipulated as a unit to define the necessary types of spacer grids required for any particular grid construction. A preferred grid construction for a ten by ten fuel rod matrix is disclosed including a grid filling all rod lattice positions for the bottom of a fuel bundle, a grid enabling the placement of a water rod of varying diameter, and finally a grid defining missing lattice positions for overlying partial length rods and permitting upward venting of steam with minimum pressure drop. An all Zircaloy band is disclosed for surrounding containment of the Inconel grid. The band consists of two or four segments Apertures are provided in the band at the corners, and portions of the corner Inconel cells project into these apertures, keying the Inconel grid to the Zircaloy band. The band is welded into continuous encircling relation. There results a spacer with an Inconel grid and surrounding Zircaloy band having minimum pressure drop and minimum neutron absorption useful with a high density fuel rod matrix required in modern fuel bundle design.

7. 发明授权

US4913707A Automated assembly apparatus 失效
标题翻译：自动装配装置
公开(公告)号：US4913707A
公开(公告)日：1990-04-03
申请号：US270006
申请日：1988-12-02
申请人： Pat F. Moreno , Robert H. Lewis , Robert G. MacIvergan , Harold B. King, Jr.
发明人： Pat F. Moreno , Robert H. Lewis , Robert G. MacIvergan , Harold B. King, Jr.
IPC分类号： G21C3/34 , G21C3/344
CPC分类号： G21C3/3424 , G21C3/344 , G21Y2002/202 , G21Y2002/205 , G21Y2002/302 , G21Y2004/30 , G21Y2004/401 , Y02E30/40 , Y10T29/531 , Y10T29/53404 , Y10T29/53426
摘要： To assemble nuclear fuel bundle spacers comprised of a multiplicity of rod-positioning ferrules, automated apparatus is provided comprising an indexing table mounting a plurality of identical, angularly spaced ferrule fixtures which are successively positioned at a first station for receipt of a pair of properly oriented ferrules. The table is indexed to present the ferrule pairs in turn to a second station where a spring is loaded in pre-assembly relation thereto. At the next table index position, a third station manipulates the successive fixture-mounted ferrule pairs to interlock the spring with each ferrule pair as a subasssembly which is then indexed in turn to a fourth station for assembly into a spacer fixture.

8. 发明授权

US4190494A Spacer with polygonal interconnetors 失效
标题翻译：带多边形互连器的间隔器
公开(公告)号：US4190494A
公开(公告)日：1980-02-26
申请号：US889304
申请日：1978-03-23
申请人： Torsten Olsson
发明人： Torsten Olsson
IPC分类号： G21C3/00 , G21C3/344
CPC分类号： G21C3/344 , Y02E30/40
摘要： A spacer assembly for vertically supporting a bundle of fuel rods, wherein the spacer assembly comprises a plurality of separate cells each surrounding a separate fuel rod. Each cell includes a pair of polygonally shaped members interconnected by at least one spring assembly, wherein the spring assembly provides a horizontal component of motion to cooling water circulating vertically through the bundle of fuel rods.
摘要翻译：一种用于垂直支撑一束燃料棒的间隔件组件，其中间隔件组件包括多个单独的单元，每个单元围绕单独的燃料棒。每个单元包括通过至少一个弹簧组件互连的一对多边形构件，其中弹簧组件提供水平的运动部分，以使冷却水垂直地循环通过燃料棒束。

9. 发明授权

US3844887A Nuclear reactor fuel assembly 失效
标题翻译：核反应堆燃料总成
公开(公告)号：US3844887A
公开(公告)日：1974-10-29
申请号：US75941068
申请日：1968-09-12
申请人： WESTINGHOUSE ELECTRIC CORP
发明人： GEORGES N , PENNELL W
IPC分类号： G21C3/344 , G21C3/348 , G21C3/356 , G21C3/34
CPC分类号： G21C3/348 , G21C3/3563 , Y02E30/40
摘要： A fuel assembly comprising a plurality of spaced, parallel, and sheathed fuel bearing elements supported at a plurality of longitudinal locations within openings in laterally extending grid structures. Each opening in each grid structure receives a fuel element which is supported by a torsion spring having a cantilever loading arm which contacts the fuel element proximate a maximum flow area of the grid opening and by one oor more nonresilient dimples in opposition to the spring. In one embodiment of a honeycomb grid lattice, the lattice is formed by preferably brazing reduced sections of preformed half-honeycombs to achieve the desired fuel element spacing.
摘要翻译：一种燃料组件，包括多个间隔开的，平行的和护套的燃料轴承元件，其支撑在横向延伸的格栅结构内的开口内的多个纵向位置处。每个格栅结构中的每个开口均接收一个燃料元件，该燃料元件由具有悬臂加载臂的扭转弹簧支撑，该悬臂装载臂接近燃料元件靠近栅格开口的最大流动面积，并且与一个或多个非弹性凹坑相对弹簧。在蜂窝网格的一个实施例中，通过优选地将预成形的半蜂窝体的减少的部分钎焊以形成所需的燃料元件间隔来形成格子。

10. 发明授权

US3819477A Spacer for fuel rods of nuclear light-water reactors 失效
标题翻译：核反应堆燃料油分离器
公开(公告)号：US3819477A
公开(公告)日：1974-06-25
申请号：US31251072
申请日：1972-12-06
申请人： SIEMENS AG
发明人： FROMEL G
IPC分类号： G21C3/34 , G21C3/344 , G21C3/30
CPC分类号： G21C3/3408 , G21C3/344 , Y02E30/40
摘要： The spacer consists of two grid elements arranged in parallel to one another and spaced apart at a distance; leaf springs for the fuel rods; and spacer bushings which extend between the two grid elements in positions provided for control rod guide tubes. Each spacer bushing encloses an associated control rod guide tube. The spacer bushing is connected with the grid elements and also with the associated control rod guide tube at at least one point, preferably by spot welding.
摘要翻译：间隔件由两个彼此平行布置并间隔开一定距离的网格元件组成; 燃料棒板簧; 以及在为控制杆导管提供的位置中在两个格栅元件之间延伸的间隔套筒。每个隔离衬套包围相关的控制杆导管。间隔衬套与网格元件连接，并且还与相关联的控制杆引导管在至少一个点处，优选通过点焊连接。

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