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公开(公告)号：US5546437A
公开(公告)日：1996-08-13
申请号：US371389
申请日：1995-01-11
申请人： Bruce Matzner , Harold B. King , David G. Smith
发明人： Bruce Matzner , Harold B. King , David G. Smith
CPC分类号： G21C3/352 , G21Y2002/302 , G21Y2004/305 , Y02E30/40
摘要： A spacer for retaining nuclear fuel rods in laterally spaced relation to one another includes first and second sets of spacer strips extending in mutually perpendicular diagonal directions relative to a generally rectilinear peripheral spacer band. The strips have linearly extending sections with adjacent sections angularly related to one another and meeting at apices. The sections of each strip alternately intersect a diagonal line across the spacer with the apices alternately located on opposite sides of the diagonal line. Alternate apices have springs projecting to one side of the strip for engaging fuel rods and apices between the alternate apices have stops projecting on opposite sides of the strip for engaging the fuel rods. Slots are provided in the strips enabling intermeshing of the strips with one another to define discrete cells peripherally encompassing and retaining fuel rods within the spacer. In another form, the spacer includes pairs of strips having alternating reversely curved sections with alternate springs and stops and assembled to form rows of cells. The strips are intermeshed in egg-crate fashion and welded at their junctures.
摘要翻译： 用于将核燃料棒保持为彼此横向间隔开的间隔件包括相对于大致直线的外围间隔带在相互垂直的对角线方向上延伸的第一组和第二组间隔条。 条带具有线性延伸部分，相邻部分彼此成角度相关并且在顶点处会合。 每个条带的部分交替地与穿过间隔物的对角线相交，顶点交替地位于对角线的相对侧上。 替代顶点具有突出到条的一侧的弹簧，用于接合燃料棒，并且在替代顶点之间的顶点具有在条的相对侧上突出的止挡件，用于接合燃料棒。 狭槽设置在带状物之间，使得条带彼此相互啮合以限定在隔离物周围包围和保持燃料棒的分立的细胞。 在另一种形式中，间隔物包括成对的条带，具有交替的反向弯曲部分，具有交替弹簧并停止并组装以形成行细胞。 条带以蛋包装方式相互啮合，并在其交点处焊接。
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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。
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3.发明授权Lower tie plate strainers including double corrugated strainers for boiling water reactors 失效下层连接板过滤器，包括用于沸水反应堆的双波纹过滤器
公开(公告)号：US5483564A
公开(公告)日：1996-01-09
申请号：US196738
申请日：1994-02-15
申请人： Bruce Matzner , Eric B. Johansson , Richard A. Wolters, Jr. , Thomas G. Dunlap , Robert B. Elkins , Harold B. King , Paul W. Sick , Kevin L. Ledford
发明人： Bruce Matzner , Eric B. Johansson , Richard A. Wolters, Jr. , Thomas G. Dunlap , Robert B. Elkins , Harold B. King , Paul W. Sick , Kevin L. Ledford
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. A double corrugated plate having large holes in the lower plate and smaller holes in the upper plate is utilized to trap debris.
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。 在下板中具有大孔的双层波纹板和上板中的较小孔用于捕集碎屑。
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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：US5002724A
公开(公告)日：1991-03-26
申请号：US399107
申请日：1989-08-28
CPC分类号： G21C3/324 , G21Y2002/201 , G21Y2004/30 , Y02E30/40
摘要： An improved upper tie plate is disclosed in a fuel bundle for a boiling water nuclear reactor. The tie plate resides in a fuel bundle including an upper tie plate, a lower tie plate, a matrix of sealed fuel rods supported therebetween, and a surrounding channel. Both the lower tie plate and the improved upper tie plate have two functions; they support the fuel rods in vertical upstanding relation between the tie plates and interior of the channel and permit the passage of moderating coolant through the channel from the bottom of the channel to the top of the channel. This moderating coolant enters through the lower tie plate in the liquid form, passes into the matrix of upstanding fuel rods where steam is generated and exits outwardly through the improved upper tie plate as a water steam mixture at the top of the fuel bundle. The improvement includes the support of the channel directly from the fuel bundle lifting bail for transmission of load directly to the bail instead of a cantilevered support through the tie plate. This direct support enables cutting away a portion of the matrix overlying the fuel rods for reduction of pressure drop in the escaping steam/water phase from the fuel bundle. Additionally, this alignment enables raising of the points of tie plate support for longer fuel rod length. Improved fuel bundle performance results.
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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.
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公开(公告)号：US4544522A
公开(公告)日：1985-10-01
申请号：US409946
申请日：1982-08-20
CPC分类号： G21C3/3566 , Y02E30/40
摘要： A spacer for use in a fuel assembly of a nuclear reactor having thin, full-height divider members, slender spring members and laterally oriented rigid stops and wherein the total amount of spacer material, the amount of high neutron cross section material, the projected area of the spacer structure and changes in cross section area of the spacer structure are minimized whereby neutron absorption by the spacer and coolant flow resistance through the spacer are minimized.
摘要翻译： 用于具有薄的全高分隔构件，细长弹簧构件和横向定向的刚性挡块的核反应堆的燃料组件中的间隔件，其中间隔材料的总量，高中子截面材料的量，投影面积 并且间隔件结构的横截面面积的变化被最小化，使得间隔件的中子吸收和通过间隔件的冷却剂流动阻力最小化。
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公开(公告)号：US5787141A
公开(公告)日：1998-07-28
申请号：US859222
申请日：1997-05-19
申请人： Bruce Matzner
发明人： Bruce Matzner
IPC分类号： G21C3/322
CPC分类号： G21C3/322 , G21Y2002/201 , G21Y2004/302 , Y02E30/38
摘要： A lower tie plate includes a lower, generally cylindrically shaped nozzle for communicating coolant through a transition section of the tie plate to a grid at the upper end of the lower tie plate. The transition section is in the geometric form of a truncated, inverted pyramid, with flat side walls intersecting the cylindrical nozzle and the undersurface of the square grid. In this manner, minimum pressure loss is achieved by the flow from the nozzle to the grid. A shaped body diverter, i.e., an inverted pyramid, may depend from the grid to divert the flow laterally with minimum pressure loss into regions where the flow is most needed in the fuel bundle, i.e., in and about the fuel rods rather than the water rods. The inverted solid may have coolant flow passages through the solid to direct the flow into registering openings in the grid.
摘要翻译： 下连接板包括下部大致圆柱形的喷嘴，用于将冷却剂通过该连接板的过渡部分连通到下部连接板的上端处的格栅。 过渡部分是截头倒置金字塔的几何形状，平坦的侧壁与圆柱形喷嘴和方形网格的下表面相交。 以这种方式，通过从喷嘴到电网的流动来实现最小的压力损失。 成形体转向器，即倒置的金字塔，可以取决于网格，以最小的压力损失将流动横向转移到燃料束中最需要流动的区域，即在燃料棒中而不是水 杆 倒置的固体可以具有通过固体的冷却剂流动通道，以将流引导到格栅中的配准开口。
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10.发明授权Apparatus and methods for simulating a change in axial power shape during a nuclear fuel rod bundle transient 失效在核燃料棒束瞬变期间模拟轴向功率形状变化的装置和方法
公开(公告)号：US5553109A
公开(公告)日：1996-09-03
申请号：US328435
申请日：1994-10-25
申请人： Bruce Matzner
发明人： Bruce Matzner
CPC分类号： H05B3/44 , G21C17/001 , G21Y2002/204 , G21Y2002/304 , G21Y2004/30 , G21Y2004/403
摘要： Apparatus is provided for simulating a nuclear fuel rod bundle transient condition and includes a vessel for containing a coolant, a pair of heating elements disposed in the vessel and a power supply for supplying power over time to each of the heating elements. The power supply is independently controlled whereby a variable supply of power over time to each heating element is provided, thus simulating the variation in power output and axial flux shape in a nuclear fuel bundle as a function of time.
摘要翻译： 提供了用于模拟核燃料棒束瞬态条件的装置，并且包括用于容纳冷却剂的容器，设置在容器中的一对加热元件和用于随时间向每个加热元件供电的电源。 电源被独立地控制，由此提供随着时间的变化的电力供应给每个加热元件，从而模拟作为时间的函数的核燃料束中的功率输出和轴向通量形状的变化。
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