-
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。
-
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.
-
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.
-
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。
-
公开(公告)号：US4749543A
公开(公告)日：1988-06-07
申请号：US29508
申请日：1987-03-24
CPC分类号： G21C3/322 , G21C3/324 , G21Y2002/201 , G21Y2004/30 , G21Y2004/305 , Y02E30/38
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.
-
公开(公告)号：US5313506A
公开(公告)日：1994-05-17
申请号：US857153
申请日：1992-03-25
申请人： Bruce Matzner , Eric B. Johansson
发明人： Bruce Matzner , Eric B. Johansson
CPC分类号： G21C3/3566 , G21C3/344 , G21Y2002/201 , G21Y2002/302 , G21Y2004/302 , G21Y2004/305 , Y02E30/40
摘要： An improved ferrule spacer for use with high density fuel rod arrays within boiling water reactor fuel bundles is disclosed. Ferrules are constructed in mating ferrule pairs. Each ferrule is divided into upper and lower ferrule halves. One ferrule half has sides thereof with the walls removed. The other ferrule half has its in place. The ferrule pairs are confronted with one ferrule inverted with respect to the other and with each complete ferrule wall of one ferrule half being juxtaposed to a ferrule half at a missing wall. Preferably, and at the point of tangency between the ferrule pairs, an aperture for receiving and confining an "H" type double loop spring is defined. The disclosure includes ferrules having a circular surround for the fuel rods and ferrules having an octagon sectioned surround for the fuel rods. Each member of the ferrule pair is symmetrical and completely interchangeable to provide for both convenient assembly and a small inventory of assembly parts.
摘要翻译： 公开了一种用于沸水反应堆燃料束内的高密度燃料棒阵列的改进的套圈间隔件。 套圈构造成配对套圈对。 每个套圈分为上，下套圈半部。 一个套圈一半具有除去壁的侧面。 另一个套圈一半已经在其中。 套圈对面对一个相对于另一个倒钩的套圈，并且一个套圈半部的每个完整的套圈壁与缺失的壁上的套圈半部并置。 优选地，并且在套圈对之间的相切点处，限定用于接收和限制“H”型双环弹簧的孔。 本公开包括具有用于燃料棒的圆形环绕的套圈和具有用于燃料棒的八边形环绕的套圈。 套圈对的每个构件是对称的并且是完全可互换的，以提供方便的组装和组装部件的小库存。
-
公开(公告)号：US4999153A
公开(公告)日：1991-03-12
申请号：US497803
申请日：1990-03-21
IPC分类号： G21C3/322
摘要： A combination of flow trippers with spacer deflectors in the two phase steam/water region of a fuel bundle in a boiling water reactor is disclosed. Spacers with deflectors are placed immediately above the flow trippers. The flow trippers are located on either an inside channel wall surrounding the fuel bundle or the outside of water chambers within the fuel bundle. Additional flow trippers may be located adjacent to the spacers, above the flow trippers that are below the spacers. The spacers are provided with deflector skirts overlying the flow trippers. In operation of the fuel bundle, excess water flows in the two phase region in a film on the unheated inside walls of the fuel channel or the outside walls of the water chambers. The film flow is perturbed by the flow trippers and is deflected toward the fuel rods. The overlying deflector skirts or tabs on the spacers further deflect the liquid toward the fuel rods to improve cooling and to increase the power generation capability of the fuel bundle. A preferred embodiment includes deflector tabs at the top of the spacer for further deflecting the stripped water layer towards the fuel rods. The synergistic combination of flow trippers and spacer deflector skirts and tabs provide better cooling than would be predicted by adding the separate effects of flow trippers, deflector skirts and flow tabs.
摘要翻译： 公开了一种在沸水反应器中的燃料束的两相蒸汽/水区域中具有隔离导流器的流动脱扣器的组合。 带偏转器的间隔物立即放置在流量跳闸的上方。 流动脱扣器位于围绕燃料束的内部通道壁或燃料束内的水室外部。 额外的流动脱扣器可以位于邻近间隔件的上方，位于间隔件下方的流动脱扣器上方。 间隔件设置有覆盖流量跳闸器的偏转裙。 在燃料束的操作中，过量的水在燃料通道的未加热的内壁或水室的外壁的膜中的两相区域中流动。 膜流被流动跳闸扰乱，并朝向燃料棒偏转。 垫片上的覆盖偏转器裙部或突片进一步使液体朝向燃料棒偏转，以改善冷却并增加燃料束的发电能力。 优选的实施例包括位于间隔件顶部的偏转片，用于进一步使剥离的水层偏向燃料棒。 流量跳闸器和间隔板偏转器裙板和凸片的协同组合提供比通过添加流动跳闸器，偏转器裙板和流动凸片的单独效果预测的更好的冷却。
-
公开(公告)号：US4571324A
公开(公告)日：1986-02-18
申请号：US535851
申请日：1983-09-26
申请人： Eric B. Johansson , Bruce Matzner
发明人： Eric B. Johansson , Bruce Matzner
摘要： In a fuel assembly for a nuclear reactor a fuel element spacer formed of an array of laterally positioned cojoined tubular ferrules each providing a passage for one of the fuel elements, the elements being laterally supported in the ferrules between laterally oriented spring members and oppositely positioned rigid stops, the wall thickness of the ferrules being relatively large and the height of the ferrules being relatively small to reduce hydride concentration in the ferrule material while maintaining relatively low flow resistance.
摘要翻译： 在用于核反应堆的燃料组件中，燃料元件间隔件由横向定位的相配合的管状套管阵列形成，每个套管均提供用于一个燃料元件的通道，元件横向支撑在套圈之间，横向定位的弹簧构件和相对定位的刚性 止动件，套圈的壁厚相对较大并且套圈的高度相对较小，以减少套圈材料中的氢化物浓度，同时保持相对低的流动阻力。
-
公开(公告)号：US5539793A
公开(公告)日：1996-07-23
申请号：US330858
申请日：1994-10-27
申请人： Eric B. Johansson , Bruce Matzner
发明人： Eric B. Johansson , Bruce Matzner
CPC分类号： G21C3/3206 , G21Y2002/201 , G21Y2002/304 , G21Y2004/30 , Y02E30/40
摘要： The lower tie plate grid includes cylindrical bosses and webs interconnecting the bosses for supporting nuclear fuel rods and defining flow channels through the grid for flowing coolant upwardly about the fuel rods. The grid includes shaped body members having flow openings, the members being disposed in each of the flow channels. In one form, the members define with the side walls of the bosses and webs a debris retention zone. In another form, sets of generally parallel, laterally spaced bars are disposed at discrete elevations in the flow channels. The bars are orthogonally related to one another whereby the effective debris catching area is defined by the openings through the crossed bars in plan, while the coolant flow area comprises essentially the space between each set of bars.
摘要翻译： 下连接板格栅包括圆柱形凸台和腹板，其互连凸台以支撑核燃料棒并且限定通过网格的流动通道，用于使冷却剂沿着燃料棒向上流动。 网格包括具有流动开口的成形体构件，该构件设置在每个流动通道中。 在一种形式中，构件用凸起的侧壁限定并且形成碎片保留区。 在另一种形式中，大致平行的，侧向间隔开的条组被设置在流动通道中的离散高程处。 杆彼此正交相关，由此有效的碎屑捕获区域由在平面图中的交叉条的开口限定，而冷却剂流动区域基本上包括每组条之间的空间。
-
公开(公告)号：US5384814A
公开(公告)日：1995-01-24
申请号：US44687
申请日：1993-04-12
申请人： Bruce Matzner , Eric B. Johansson , Richard A. Wolters, Jr. , Thomas G. Dunlap , Robert B. Elkins , Harold B. King , Paul W. Sick
发明人： Bruce Matzner , Eric B. Johansson , Richard A. Wolters, Jr. , Thomas G. Dunlap , Robert B. Elkins , Harold B. King , Paul W. Sick
CPC分类号： G21C3/3206 , G21C1/086 , G21Y2002/104 , G21Y2002/201 , G21Y2004/30 , G21Y2004/302 , G21Y2004/303 , Y02E30/40
摘要： In a boiling water reactor fuel bundle, a three dimensional debris catching grid construction is placed within the flow volume defined by the lower tie plate assembly between the inlet nozzle and upper fuel rod supporting grid. A perforated plate is utilized having round holes as small consistent with the prevention of inadvertent closure due crudding and a hole pitch consistent with mechanical integrity requirements. The perforated plate is placed in a three dimensional construction such as a dome, cylinder, pyramid, inverted pyramid or corrugated construction spanning the flow volume of the lower tie plate assembly. As a consequence of this three dimensional grid construction, the total flow through area of the perforations in the metal plate does not introduce appreciable pressure drop in the lower tie plate assembly between the inlet nozzle and the rod supporting grid. Fluid movement at the debris restraining holes of the grid construction has a low flow velocity and a change in flow direction before passing through the holes to discourage debris from finding its way through the grid holes. Finally, it is possible to incorporate debris traps within the flow volume of the lower tie plate assembly that can cause trapping and subsequent removal of trapped debris upon fuel bundle replacement.
摘要翻译： 在沸水反应堆燃料束中，三维碎屑捕获栅格结构放置在由入口喷嘴和上燃料棒支撑栅之间的下连接板组件限定的流动体积内。 使用多孔板，其圆形孔小，防止由于粗糙度而导致的无意闭合，以及与机械完整性要求一致的孔间距。 多孔板被放置在三维结构中，例如圆顶，圆柱体，金字塔，倒金字塔或波纹结构，跨越下拉板组件的流动体积。 作为这种三维格栅结构的结果，金属板中的穿孔面积的总流量不会在入口喷嘴和支撑杆之间的下连接板组件中引入明显的压降。 格栅结构的碎屑限制孔处的流体运动在通过孔之前具有低流速和流动方向的变化，以阻止碎屑通过栅格孔。 最后，可以将碎屑收集器结合在下连接板组件的流动体积内，这可以导致在燃料束更换时捕获和随后的捕获的碎屑的去除。
-
-
-
-
-
-
-
-
-
搜索结果
44 条记录 (耗时 0.023 秒)