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公开(公告)号：US5727039A
公开(公告)日：1998-03-10
申请号：US616509
申请日：1996-03-19
申请人： John L. Harmon , Richard G. Patterson , Robert B. Elkins , Russell P. Higgins , Edward A. Croteau , Harold B. King , Christian D. Frederickson , Gerald M. Latter , Anthony P. Reese , David W. White
发明人： John L. Harmon , Richard G. Patterson , Robert B. Elkins , Russell P. Higgins , Edward A. Croteau , Harold B. King , Christian D. Frederickson , Gerald M. Latter , Anthony P. Reese , David W. White
CPC分类号： G21C3/332 , G21Y2002/302 , G21Y2002/304 , G21Y2004/301 , Y02E30/40
摘要： In a nuclear reactor fuel bundle assembly having a plurality of fuel rods and a non-round water rod extending between upper and lower tie plates, and having at least one fuel rod spacer located along the non-round water rod, an improvement which includes cooperating components on the fuel rod spacer and on the water rod for permitting movement of the spacer along the water rod to a desired axial location and for thereafter preventing further axial movement of the spacer in at least one of two opposite axial directions, the cooperating components including at least one spring on one of the spacer and the water rod.
摘要翻译： 在具有多个燃料棒和在上下连接板之间延伸的非圆形水杆的核反应堆燃料束组件中，并且具有沿着非圆形水棒定位的至少一个燃料棒间隔件，其包括配合 燃料棒间隔件和水杆上的部件，用于允许间隔件沿水杆移动到期望的轴向位置，并且此后防止间隔件在两个相对的轴向方向中的至少一个中的进一步的轴向运动，所述协作部件包括 在间隔件和水杆之一上的至少一个弹簧。
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公开(公告)号：US5757874A
公开(公告)日：1998-05-26
申请号：US678046
申请日：1996-07-10
申请人： Edward A. Croteau , Robert B. Elkins , Thomas G. Evans , Harold B. King , David G. Smith , Russell P. Higgins , Gerald M. Latter
发明人： Edward A. Croteau , Robert B. Elkins , Thomas G. Evans , Harold B. King , David G. Smith , Russell P. Higgins , Gerald M. Latter
CPC分类号： G21C3/3563 , G21Y2002/302 , G21Y2004/30 , Y02E30/40
摘要： The spacer comprises a plurality of strips interleaved with one another to form an eggcrate-type pattern defining essentially rectilinear cells for each fuel rod. Each strip includes a central body portion with cantilevered loop spring-like projections extending to opposite sides, with spring contact portions projecting inwardly. Stops are provided along each of the central body regions of the strips intermediate the loop springs that project to the opposite side of the strip. Adjoining walls have loop spring portions for biasing the rod into engagement with opposing stops whereby each fuel rod is supported at six contact points, i.e., four spring contact points and two hard stop contacts opposite the paired spring contacts.
摘要翻译： 间隔物包括彼此交错的多个条，以形成为每个燃料棒基本上限定直线细胞的蛋类型图案。 每个条带包括中心主体部分，其具有延伸到相对侧的悬臂弹簧状突出部，弹簧接触部分向内突出。 沿着条带的每个中心体区域提供止动件，该条带在环形弹簧之间延伸，该弹簧突出到条带的相对侧。 相邻的墙壁具有环形弹簧部分，用于将杆偏压成与相对的止挡接合，由此每个燃料棒被支撑在六个接触点处，即四个弹簧接触点和与成对的弹簧接触件相对的两个硬止动触头。
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公开(公告)号：US5488634A
公开(公告)日：1996-01-30
申请号：US194357
申请日：1994-02-10
CPC分类号： G21C3/3206 , G21Y2002/201 , G21Y2002/304 , G21Y2004/30 , Y02E30/40
摘要： A unitary one-piece lower tie plate grid has a lower portion and an upper portion for supporting the fuel rods. The lower tie plate grid includes cylindrical boss portions extending upwardly from the lower grid portion and arranged in square matrices for receiving the lower end plugs of the fuel rods. Web portions extending upwardly from the lower tie plate portion interconnect the boss portions along the sides of the matrices. The lower grid portion includes a plurality of openings which open into the flow spaces defined by the convex portions of the bosses and the webs within each square matrix of the upper portion of the tie plate. Coolant flows through the openings into the flow spaces for further flow upwardly about the fuel rods. The openings are radiussed adjacent their lower ends and have divergent side walls downstream of a throat area to define a flow venturi.
摘要翻译： 一体的单件下连接板格架具有用于支撑燃料棒的下部和上部。 下连接板网格包括从下格栅部分向上延伸的圆柱形凸台部分，并且以方形矩阵布置以接收燃料棒的下端塞。 从下连接板部分向上延伸的网部分沿着矩阵的侧面互连凸起部分。 下格栅部分包括多个开口，这些开口通过凸起部分的凸部和连接板上部的每个正方形矩阵内的腹板限定的流动空间。 冷却剂流过开口进入流动空间，以进一步在燃料棒周围向上流动。 开口在其下端附近被辐射，并且在喉部区域下游具有发散的侧壁以限定流量文丘里管。
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公开(公告)号：US5089221A
公开(公告)日：1992-02-18
申请号：US603046
申请日：1990-10-25
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.
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公开(公告)号：US5375154A
公开(公告)日：1994-12-20
申请号：US046290
申请日：1993-04-15
申请人： Bruce Matzner , Gerald M. Latter
发明人： Bruce Matzner , Gerald M. Latter
CPC分类号： G21C3/348 , G21C3/34 , G21Y2002/201 , G21Y2004/302 , Y02E30/40
摘要： A spacer array is disclosed in which alternating cells are disposed at differing elevations. In a preferred octagonal spacer cell array, alternate fuel rods within the rows and columns of the fuel bundle matrix are surrounded by octagonal spacer cells at a first elevation. Likewise, and in the same preferred octagonal spacer array, the remaining alternate fuel rods within the rows and columns of the fuel bundle matrix are surrounded by octagonal spacer cells at a second elevation. The octagonal spacer cells of the spacer array at one level adjoin the octagonal spacer cells of the spacer array at an adjacent level. Specifically, each octagonal spacer cell has the top and/or the bottom of as many as four of its eight sides disposed for joinding with one side of as many as four octagonal cells in an adjacent cell layer. Each cell has approximately 0.6 of an inch height, or one-half the 1.2 inch height of the prior art. Physically each cell would have approximately half the height of the prior art cell type spacers. There results a spacer cell array which distributes half of the pressure drop at a first elevation, and the remaining half of the pressure at a second elevation for a projected spacer area of one-half that area of the prior art. Further, and because the two cell arrays making up the spacer are disposed at differing elevations--immediately above and below each other--the produced flow resistance at one level of the spacer cells does not have horizontally immediately adjacent cells. Thus, the cells in one layer do not co-act with adjacent flow frictions to the same extent as the co-action would occur if all flow frictions and restrictions were at the same elevation. There results an improved and lesser pressure drop in the disclosed spacer array.
摘要翻译： 公开了间隔件阵列，其中交替的电池设置在不同的高度。 在优选的八边形间隔元件阵列中，在燃料束矩阵的行和列内的备用燃料棒在第一高度被八角形间隔元件包围。 类似地，并且在相同的优选的八边形间隔件阵列中，燃料束矩阵的行和列内的其余备用燃料棒在第二高度被八角形间隔单元包围。 在一个级处的间隔物阵列的八边形间隔体单元邻近间隔物阵列的八边形间隔体单元处于相邻层。 具体地，每个八边形间隔单元的顶部和/或底部具有设置成在相邻单元层中具有多达四个八边形单元的一侧的八边中的多达四个。 每个单元具有约0.6英寸高度，或现有技术的1.2英寸高度的一半。 在物理上每个单元将具有现有技术的单元型间隔物的大约一半的高度。 这样就形成了间隔电池阵列，其将第一高度处的压降的一半分配，并且在第二高度处分配压力的剩余一半，用于现有技术的面积的一半的投影间隔区。 此外，并且由于构成间隔物的两个电池阵列设置在不同的高度 - 紧邻彼此之间和之上 - 所产生的间隔电池的一个电平的流动电阻不具有水平立即相邻的电池。 因此，如果所有的流动摩擦和限制都处于相同的高度，则一层中的电池不会与相邻的流动摩擦共同作用，因为共同作用将发生。 在所公开的间隔物阵列中导致了改进的和较小的压降。
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6.发明授权Handle unit for a fuel assembly in a nuclear reactor and fuel assembly having modified channel 失效用于核反应堆中燃料组件的处理单元和具有改进通道的燃料组件
公开(公告)号：US5809101A
公开(公告)日：1998-09-15
申请号：US655875
申请日：1996-05-29
摘要： A fuel bundle assembly for a nuclear reactor includes a modified channel and a handle unit that improves pressure drop performance. With the modified channel, one approach is to vary the outside dimension of the fuel channel along the length of the channel, but maintain a constant channel wall thickness. Another approach is to maintain the external dimensions of the fuel channel and vary the wall thickness along the length of the channel. The handle unit is formed including a handle member and a separate rod support member releasably engageable with the handle member. The handle member includes channels for receiving latch pin assemblies, coolant rods and a spacer assembly. The rod support member includes a plurality of fuel rod support chambers providing lateral support for the fuel rods of the fuel assembly. The rod support member also includes a main chamber that is sized to receive a portion of the handle member in a friction fit. In addition to providing improved pressure drop performance, the arrangement eliminates the need to realign the fuel rods in an upper tie plate or an upper spacer when access to the fuel rods is necessary. In addition, the handle unit serves to prevent failed end plugs from escaping the fuel bundle.
摘要翻译： 用于核反应堆的燃料束组件包括改进的通道和提高压降性能的手柄单元。 使用改进的通道，一种方法是沿通道的长度改变燃料通道的外部尺寸，但是保持恒定的通道壁厚度。 另一种方法是保持燃料通道的外部尺寸并沿着通道的长度改变壁厚度。 手柄单元形成为包括手柄构件和可释放地与手柄构件接合的单独的杆支撑构件。 手柄构件包括用于接收闩锁销组件，冷却剂棒和间隔件组件的通道。 杆支撑构件包括多个燃料棒支撑室，为燃料组件的燃料棒提供侧向支撑。 杆支撑构件还包括主室，其尺寸适于以摩擦配合接收手柄构件的一部分。 除了提供改进的降压性能之外，当需要进入燃料棒时，该布置消除了在上连接板或上隔板中重新对准燃料棒的需要。 此外，手柄单元用于防止失效的端塞从燃料束逸出。
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7.发明授权
公开(公告)号：US5085827A
公开(公告)日：1992-02-04
申请号：US652340
申请日：1991-02-06
IPC分类号： G21C3/356
CPC分类号： G21C3/3566 , G21Y2002/201 , G21Y2002/302 , G21Y2002/304 , G21Y2004/30 , Y02E30/40
摘要： A spring-and-spacer assembly for maintaining fuel rods upright in a fuel assembly of a nuclear reactor core is provided. The spring is in the form of a continuous loop with first and second legs having mid-leg rod-contact regions. Bend regions are positioned on each side of each contact region extending toward the interior of the loop spring. In most positions, the spring is used to load two adjacent fuel rods. In configurations in which there is an unpaired fuel rod, a plate having a tab for contacting the spring is provided. The spring provides the desired force, such as about 2.5 pounds per fuel rod, in a small rod-to-rod spacing of less than about 0.14 inches.
摘要翻译： 提供了一种用于将燃料棒竖直地保持在核反应堆芯的燃料组件中的弹簧和间隔器组件。 弹簧呈连续回路的形式，其中第一和第二腿具有中腿杆接触区域。 弯曲区域位于每个接触区域的朝向环形弹簧内部延伸的每侧。 在大多数位置，弹簧用于装载两个相邻的燃料棒。 在具有未配对燃料棒的构造中，提供具有用于接触弹簧的突片的板。 弹簧以小于约0.14英寸的小杆对杆间隔提供期望的力，例如每个燃料棒约2.5磅。
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公开(公告)号：US5787140A
公开(公告)日：1998-07-28
申请号：US654957
申请日：1996-05-29
CPC分类号： G21C3/334 , G21C3/324 , G21Y2002/201 , G21Y2002/301 , G21Y2002/303 , G21Y2004/302 , G21Y2004/305 , Y02E30/40
摘要： A fuel bundle assembly for a nuclear reactor includes a modified channel that improves pressure drop performance and a handle assembly that includes structure for preventing a broken end plug from escaping the fuel bundle. In modifying the channel, one approach is to vary the outside dimension of the fuel channel along the length of the channel, but maintain a constant channel wall thickness. Another approach is to maintain the external dimensions of the fuel channel and vary the wall thickness along the length of the channel. The handle assembly replaces the conventional upper tie plate and is provided with structure for preventing debris such as a broken fuel rod end plug from escaping the fuel bundle. The structure preferably includes a plurality of gridwork cross members forming a substantially square grid including gridwork windows that are sized smaller than the fuel rod end plugs.
摘要翻译： 用于核反应堆的燃料束组件包括改进压降性能的改进通道和包括防止破坏的端塞从燃料束逸出的结构的手柄组件。 在修改通道时，一种方法是沿着通道的长度改变燃料通道的外部尺寸，但是保持恒定的通道壁厚度。 另一种方法是保持燃料通道的外部尺寸并沿着通道的长度改变壁厚度。 手柄组件取代了常规的上连接板，并且设置有用于防止诸如破坏的燃料棒端塞的碎屑从燃料束逸出的结构。 该结构优选地包括多个格栅横向构件，其形成大致正方形的格栅，包括尺寸小于燃料棒端塞的格栅窗。
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公开(公告)号：US5209899A
公开(公告)日：1993-05-11
申请号：US754825
申请日：1991-09-04
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.
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