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公开(公告)号：US4814137A
公开(公告)日：1989-03-21
申请号：US156110
申请日：1988-02-16
申请人： Peter H. Beuchel , Yu C. Lee
发明人： Peter H. Beuchel , Yu C. Lee
CPC分类号： G21C3/28 , G21Y2002/104 , G21Y2002/206 , G21Y2002/303 , G21Y2004/30 , Y02E30/40 , Y10S376/903
摘要： A fuel pellet for a nuclear reactor fuel rod is fabricated with smooth and gently sloping surfaces having no sharp edges or areas of high stress concentration. The bearing surfaces of the fuel pellets are contoured so that the pellets are easily stacked within a fuel rod and permit pivoting action between the fuel pellets. The fuel pellets are stacked end to end in a fuel rod which is incorporated into a fuel assembly for a nuclear reactor.
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公开(公告)号：US5444748A
公开(公告)日：1995-08-22
申请号：US222065
申请日：1994-04-04
申请人： Peter H. Beuchel , Yu C. Lee , James A. Sparrow
发明人： Peter H. Beuchel , Yu C. Lee , James A. Sparrow
CPC分类号： G21C3/3563 , G21Y2002/104 , G21Y2002/50 , G21Y2004/30 , Y02E30/40
摘要： Disclosed is a grid structure for supporting fuel rods in a nuclear reactor. The grid structure is formed of a plurality of interconnected thin metal grid straps that are welded or brazed together to provide a structural network of interconnected open grid cells, similar to an "egg crate divider". The grid straps are provided at regular intervals, corresponding to the width of a grid cell, with pairs of spaced, substantially horizontal, slotted spring-like projections and a substantially X-shaped spring-like projection vertically intermediate the horizontal projections. The spring-like projections are designed to support and hold the fuel rods within the grid cells under both balanced and unbalanced forces acting on the fuel rod assembly while it is in service, surrounded by coolant in the nuclear reactor.
摘要翻译： 公开了一种用于在核反应堆中支撑燃料棒的格栅结构。 栅格结构由多个互连的薄金属网格带形成，其被焊接或钎焊在一起，以提供类似于“蛋箱隔板”的互连的开放网格单元的结构网络。 栅格带以规则的间隔设置，对应于网格单元的宽度，具有成对的间隔开的，基本上水平的开槽的弹簧状突起和垂直于水平突起的垂直的X形弹簧状突起。 弹簧状突起被设计成在燃料棒组件使用期间在平衡和不平衡的作用在燃料棒组件上的力的作用下，将燃料棒支撑并保持在电网内，并在核反应堆中被冷却剂包围。
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公开(公告)号：US5024559A
公开(公告)日：1991-06-18
申请号：US486231
申请日：1990-02-28
申请人： Peter H. Beuchel
发明人： Peter H. Beuchel
CPC分类号： B30B15/065 , B30B11/02 , C22C29/08
摘要： An apparatus for forming a pellet is disclosed that includes at least one punch that is reciprocably movable through an opening in a die for compressing a granular material, such as uranium dioxide, into a pellet such as the fuel pellets used in the fuel assemblies that generate power in nuclear reactors. The punch is advantageously formed from an alloy consisting essentially of tungsten carbide having a grain size of less than one micron which is embedded in a matrix of cobalt which constitutes between 16.5 and 17.5% by weight of the alloy. The alloy is preferably hot isostatically pressed to achieve zero porosity and a density of approximately 14.0 gm/cc.sup.3. Additionally, essentially pure ingredients are preferably used to avoid interfaces in the resulting alloy which could provide situs for chipping. The resulting alloy has a Rockwell scale A hardness of 89.0, and results in a punch which, even when chamfered around its edges, is capable of producing a large number of uranium dioxide fuel pellets without chipping.
摘要翻译： 公开了一种用于形成颗粒的装置，其包括至少一个能够可往复运动地通过模具中的开口移动的冲头，用于将颗粒状材料（例如二氧化铀）压缩成颗粒，例如在燃料组件中使用的燃料颗粒，其产生 核反应堆的权力。 该冲头有利地由基本上由晶粒尺寸小于1微米的碳化钨组成的合金形成，该碳化钨嵌入钴的基体中，该基体构成合金重量的16.5至17.5％。 该合金优选是热等静压以实现零孔隙率和约14.0gm / cc 3的密度。 此外，基本上纯的成分优选用于避免所得合金中的界面，其可以提供用于碎裂的位置。 所得到的合金的洛氏硬度为89.0，硬度达到89.0，即使在其边缘被倒角的情况下，也能够产生大量无捣碎的二氧化铀燃料颗粒。
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公开(公告)号：US5395227A
公开(公告)日：1995-03-07
申请号：US110032
申请日：1993-08-20
CPC分类号： B30B11/08 , B30B15/304
摘要： An adjustable powder flow gate for a rotary pellet press has a movable gate wherein one dimensional motion of the gate across an opening in a powder flow feed frame on the rotating turret of the press is effected with a rotatable shaft having a screw connection to a member attached to the gate. The shaft is maintained in a selected rotational position with a bias member that is movable between an engaged and a disengaged position. The bias member is adapted to engage a selected detent on a member attached to the shaft having several circumferentially spaced detents when the bias member is in the engaged position. The shaft can freely rotate when the bias member is in the disengaged position. An operator can easily adjust the size of the opening by first disengaging the bias member from the selected detent, turning the shaft to move the gate to the desired position, and then engaging the bias member into a newly selected detent.
摘要翻译： 用于旋转颗粒压机的可调节粉末流动门具有可移动门，其中门跨过冲压机的旋转转台上的粉末流进料架中的开口的一维运动是通过具有与构件的螺纹连接的可旋转轴来实现的 附在门口。 轴被保持在选定的旋转位置，其中偏置构件可在接合位置和脱离位置之间移动。 当偏置构件处于接合位置时，偏置构件适于将附接到轴上的构件上的所选择的棘爪接合到具有若干周向间隔开的棘爪上。 当偏置构件处于分离位置时，轴可以自由旋转。 操作人员可以通过首先使偏压构件与所选择的止动器脱离，转动轴将门移动到期望的位置，然后将偏置构件接合到新选择的制动器中，从而容易地调节开口的尺寸。
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公开(公告)号：US4175003A
公开(公告)日：1979-11-20
申请号：US754050
申请日：1976-12-23
申请人： Peter H. Beuchel , Eric G. Cooper
发明人： Peter H. Beuchel , Eric G. Cooper
CPC分类号： G21C3/3563 , Y02E30/40
摘要： A grid of improved design for a nuclear reactor fuel assembly which includes a multiplicity of interleaved straps enclosed in a peripheral frame which forms a grid of egg-crate configuration. Each cell formed by the grid straps, except those containing control rod guide tubes, supports a fuel rod which is held in place by springs projecting laterally inwardly into each cell from the grid straps. The springs extend parallel to the fuel rods and are spaced at 90.degree. intervals around the rod. Further, each of two adjacent springs contact a fuel rod at two points along its length and each of the other two adjacent springs contact the fuel rod at one point thus imparting strength and flexibility to the fuel assembly containing such grids.
摘要翻译： 用于核反应堆燃料组件的改进设计的网格，其包括封闭在形成蛋箱配置网格的外围框架中的多个交错带。 由网格带形成的每个电池除了含有控制棒导管的电池外，都支撑燃料棒，该燃料棒通过从电网带横向向内突出到每个电池中的弹簧保持在适当的位置。 弹簧平行于燃料棒延伸，并围绕杆间隔90度。 此外，两个相邻的弹簧中的每一个在其长度上的两个点处接触燃料棒，并且另外两个相邻的弹簧中的每一个在一点处接触燃料棒，从而赋予包含这种格栅的燃料组件强度和柔性。
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