-
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：US5371768A
公开(公告)日：1994-12-06
申请号：US989661
申请日：1992-12-14
申请人： Bruce Matzner
发明人： Bruce Matzner
CPC分类号： G21C3/344 , G21C3/322 , G21C2003/3432 , G21Y2002/201 , G21Y2004/30 , G21Y2004/302 , Y02E30/31 , Y02E30/38
摘要： In a boiling water nuclear reactor fuel bundle, the use of a shortened ferrule spacer in combination with overlying swirl vanes is set forth. In the preferred embodiment, the shortened ferrule spacer is placed under any swirl vanes and has an individual ferrule surrounding each fuel rod at the elevation of the spacer. Each ferrule is given both minimum side wall thickness in the range of 0.020 inches or less as well as reduced height in the order of 0.9 inch or less. The reduced height and thickness of the ferrule spacer is required to maintain pressure drop within acceptable limits and still tends to augment the required liquid film for steam generation over the fuel rod lengths downstream (that is immediately above) the spacer. At the same time, the swirl vane structure is placed immediately above the ferrule spacer overlying the so-called subchannel region of the ferrule spacer between the fuel rods.
摘要翻译： 在沸水核反应堆燃料束中，提出了使用缩短的套圈间隔件与上覆旋流叶片的组合。 在优选实施例中，缩短的套圈间隔件放置在任何旋转叶片下方，并且在间隔件的高度处具有围绕每个燃料棒的单独的套圈。 给予每个套圈的最小侧壁厚度在0.020英寸或更小的范围内，以及减小高度为0.9英寸或更小的量级。 需要减小套管间隔件的高度和厚度以将压降保持在可接受的限度内，并且仍然倾向于增加用于在隔离件下游（即紧靠上方）的燃料棒长度上产生蒸汽的所需液膜。 同时，涡流叶片结构紧紧地位于套管间隔件的上方，覆盖燃料棒之间的套圈间隔物的所谓子通道区域。
-
公开(公告)号：US5317613A
公开(公告)日：1994-05-31
申请号：US785839
申请日：1991-10-31
申请人： Larry E. Fennern
发明人： Larry E. Fennern
CPC分类号： G21C3/322 , G21C3/32 , G21C3/336 , G21Y2002/201 , G21Y2002/301 , G21Y2004/30 , G21Y2004/302 , Y02E30/31 , Y02E30/38
摘要： A reactor core with each fuel rod surrounded by an individual cylindrical channel is disclosed. This individual channel on each fuel rod provides thermal hydraulic and heat transfer advantages to enable all fuel rods within the fuel bundle to uniformly approach their own thermal limits. The preferred fuel rod pitch is a triangular pitch between the individual fuel rods as they are discretely surrounded by their own channel. The new triangular geometry provides for more uniform (flat) power distributions within all fuel rods--and hence all groups of fuel rods. Bypass flow is introduced uniformly between the fuel rod channels, rather than heterogeneously in the channel gap and water rods as in present BWR fuel designs. Individual fuel rod channels can be orificed differently, as required, to match inlet flow to fuel rod power output to maintain uniformity between all fuel rods as they approach their respective thermal limits. Gaps between bundles can be eliminated, or at least minimized, yielding even higher power density. Spacers with flow diverting structure vanes are applied within the fuel rod channel to limit relative displacement between the channel wall and fuel rod cladding and to serve as turbulent flow promoters.
摘要翻译： 公开了具有由单独的圆柱形通道包围的每个燃料棒的反应堆芯。 每个燃料棒上的这个单独的通道提供热液压和传热优点，使得燃料束内的所有燃料棒能够均匀地接近其自身的热限制。 优选的燃料棒间距是各个燃料棒之间的三角形间距，它们被它们自己的通道离散地包围。 新的三角形几何形状提供了在所有燃料棒内以及所有燃料棒组中的更均匀（平坦的）功率分布。 旁路流量在燃料棒通道之间均匀地引入，而不是像现在的BWR燃料设计中那样在通道间隙和水棒中不均匀地引入。 根据需要，单独的燃料棒通道可以不同地进行喷孔，以将入口流量与燃料棒功率输出相匹配，以在所有燃料棒接近其各自的热限制时保持均匀性。 束之间的间隙可以消除，或至少最小化，产生更高的功率密度。 具有分流结构叶片的间隔件被施加在燃料棒通道内以限制通道壁和燃料棒包层之间的相对位移并且用作湍流促进器。
-
公开(公告)号：US5186891A
公开(公告)日：1993-02-16
申请号：US702212
申请日：1991-05-17
申请人： Eric B. Johansson , Bruce Matzner
发明人： Eric B. Johansson , Bruce Matzner
CPC分类号： G21C3/344 , G21C3/322 , G21Y2002/201 , G21Y2002/302 , G21Y2004/30 , Y02E30/31 , Y02E30/38
摘要： A swirl vane is disclosed for addition to a spring metal grid spacer utilized with a conventional nuclear boiling water nuclear reactor. The spring metal spacer includes a matrix of fuel rod containing cells. Each cell has at least one spring leg and at least two fuel rod encircling arms. The spring leg functions to bias a fuel rod contained within the cell at the spacer to one side of the cell. The two rod encircling arms define stops against which the fuel rods are biased. The cells themselves are welded into a unitary matrix and preferably surrounded by a metallic band. The improved swirl vane of this invention includes an "I" shaped spring steel strip. This strip includes top and bottom tabs for engaging the respective top and bottom grid structure of the spacer. The "I" shaped strip is then twisted to provide the swirl vane surface, this twisting being preferably slightly less than or greater than the total twisting required. Thereafter, the band is inserted to the grid and the twist used to wedge the band in place until welding has been utilized to secure the vane in place. In an alternate embodiment a row of swirl vanes is formed from a long strip so that the swirl vanes are joined at one end. Rows of swirl vanes are inserted into the spacer as units.
-
公开(公告)号：US5133927A
公开(公告)日：1992-07-28
申请号：US619973
申请日：1990-11-30
申请人： Hiroaki Kadano , Akio Obiuchi , Koichi Tominaga
发明人： Hiroaki Kadano , Akio Obiuchi , Koichi Tominaga
摘要： There is disclosed a grid in a nuclear fuel assembly for supporting fuel rods and thimbles, which includes a plurality of elongated straps intersecting perpendicularly with each other to define a plurality of grid cells. A plurality of engaging units are provided on the grid cells for supporting thimbles, respectively. Each engaging unit includes at least one engaging member provided on at least one of the opposite ends of the straps of the grid cell and defining an engaging portion. A plurality of cylindrical sleeves are arranged in the grid cells for supporting thimbles, respectively. Each sleeve has at least one engaging projection associated with the engaging portion of the engaging member. The engaging projection of the sleeve and the engaging portion of the engaging member are formed such that when the sleeve is turned circumferentially, the engaging projection is held in engagement with the engaging portion.
摘要翻译： 公开了用于支撑燃料棒和套管的核燃料组件中的格栅，其包括彼此垂直相交以限定多个格栅单元的多个细长带。 多个接合单元分别设置在用于支撑套管的格栅单元上。 每个接合单元包括至少一个接合构件，其设置在格栅单元的带的相对端的至少一个上并限定接合部分。 多个圆柱形套筒分别布置在用于支撑套管的格栅单元中。 每个套筒具有与接合构件的接合部分相关联的至少一个接合突起。 套筒和接合部件的接合部分的接合突起形成为使得当套筒周向转动时，接合突起被保持与接合部分接合。
-
公开(公告)号：US4780273A
公开(公告)日：1988-10-25
申请号：US827289
申请日：1986-02-06
申请人： Heinrich Dressel
发明人： Heinrich Dressel
CPC分类号： G21C3/344 , G21Y2002/201 , G21Y2004/30 , G21Y2004/305 , Y02E30/40
摘要： A nuclear reactor fuel assembly for accommodating mutually parallel rods disposed side by side therein includes a spacer formed of two mutually parallel grid sections, each of the grid sections including outer straps flatly facing the rods, each of the grid sections including main sleeves being positioned like positions of the same color in rows and columns disposed at right angles on a chess board leaving a free intermediate position between each two occupied positions, the main sleeves dividing the grid sections into grid mesh openings at the positions each able to receive a respective rod therein, each main sleeve in one of the grid sections being aligned with a main sleeve in the other grid section forming pairs of main sleeves, connecting straps each interconnecting the main sleeves of a pair of main sleeves forming contact springs for rods, each of the connecting straps having a width being smaller than the circumference of one of the main sleeves, and spacer sleeves each being disposed between and resting against two of the main sleeves in one of the grid sections.
摘要翻译： 用于容纳彼此并排布置的相互平行的杆的核反应堆燃料组件包括由两个相互平行的栅格部分形成的间隔件，每个栅格部分包括平坦地面对杆的外带，每个栅格部分包括主套筒， 在棋盘上以直角设置的行和列中相同颜色的位置在每两个占用位置之间留下空闲的中间位置，主套管将网格部分分成网格网孔，每个位置可以在其中容纳相应的杆 其中一个网格部分中的每个主套筒与另一格栅部分中的主套筒对准，形成成对的主套筒，每个连接带互连一对主套筒的主套筒，形成用于杆的接触弹簧，每个连接 带子的宽度小于一个主套筒的周长，隔离套筒各自为d 在其中一个网格部分中的两个主套筒之间设置并搁置在其间。
-
47.发明授权
公开(公告)号：US4587704A
公开(公告)日：1986-05-13
申请号：US607745
申请日：1984-05-07
CPC分类号： G21C3/344 , Y02E30/40 , Y10T29/49863 , Y10T29/49947
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 slender spring members and laterally oriented rigid stops.
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圈阵列形成，每个套管均为一个燃料元件提供通道，元件横向地支撑在细长弹簧构件和横向定向的刚性挡块之间的套圈中 。
-
公开(公告)号：US4508679A
公开(公告)日：1985-04-02
申请号：US410124
申请日：1982-08-20
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 slender spring members and laterally oriented rigid stops.
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圈阵列形成，每个套管均为一个燃料元件提供通道，元件横向地支撑在细长弹簧构件和横向定向的刚性挡块之间的套圈中 。
-
公开(公告)号：US4433721A
公开(公告)日：1984-02-28
申请号：US289240
申请日：1981-08-03
申请人： Armando Biaggi
发明人： Armando Biaggi
CPC分类号： F28F9/0135 , Y10S165/424
摘要： The grid for the parallel rows of tubes is composed of metal guide strips and spacer strips. The guide strips are disposed in pairs with semi-cylindrical portions defining circular openings for the tubes. The spacer strips are formed with bent portions to bear against the semi-cylindrical portions of the guide strips as well as rectilinear portions which are radial to the tubes.
摘要翻译： 用于平行排管的格栅由金属引导条和间隔条组成。 引导条成对配置有限定用于管的圆形开口的半圆柱形部分。 间隔条形成有弯曲部分以抵靠引导条的半圆柱形部分以及与管径向的直线部分。
-
公开(公告)号：US3900367A
公开(公告)日：1975-08-19
申请号：US31257772
申请日：1972-12-06
发明人： CLASS GOTTFRIED
摘要： In a nuclear reactor, a core element bundle formed of a plurality of side-by-side arranged core elements is surrounded by restraining elements that exert a radially inwardly directed restraining force generating friction forces between the core elements in a restraining plane that is transverse to the core element axes. The adjoining core elements are in rolling contact with one another in the restraining plane by virtue of rollingtype bearing elements supported in the core elements.
-
-
-
-
-
-
-
-
-
搜索结果
103 条记录 (耗时 0.016 秒)
