公开(公告)号：US5183629A

公开(公告)日：1993-02-02

申请号：US735251

申请日：1991-07-24

申请人： Jean-Noel Canat ,  Regis Mortgat

发明人： Jean-Noel Canat ,  Regis Mortgat

IPC分类号： G21C3/34 ,  G21C3/322 ,  G21C3/332 ,  G21C3/352

CPC分类号： G21C3/332 ,  G21C3/322 ,  G21Y2002/201 ,  G21Y2002/303 ,  G21Y2004/30 ,  G21Y2004/302 ,  Y02E30/38

摘要： The additional mixing grid has no belt and comprises at least two sets of crossed plates that are fixed to each other at their cross-points, the plates being fitted with fins for stirring the coolant, and delimiting cells, some for receiving guide tubes and the others for receiving fuel rods. Each plate is provided, on each of the faces of those internal cells that receive the rods, with bosses that project sufficiently little to leave radial clearance for the rods passing through the cells and the projection of the bosses is proportioned relative to the projection of the fins so that in the event of bending vibration the rods come into contact with the bosses without reaching the fins, the lengths of the plates being such that the footprint of the additional grid is less than the footprint of the polygon constituting the virtual envelope of the rods.

摘要翻译： 附加的混合格栅没有带，并且包括至少两组交叉板，它们在它们的交叉点彼此固定，板装配有用于搅拌冷却剂的翅片，并且限定了细胞，一些用于接收导管和 其他用于接收燃料棒。 在接收杆的那些内部电池的每个面上设置每个板，凸起足够小，以使得穿过电池的棒留下径向间隙，并且凸台的突出部分相对于 翅片，使得在弯曲振动的情况下，杆与凸台接触而不到达翅片，板的长度使得附加格栅的占地面积小于构成虚拟外壳的多边形的占地面积 杆

公开(公告)号：US5035852A

公开(公告)日：1991-07-30

申请号：US376771

申请日：1989-07-07

申请人： John T. Land ,  Ronald J. Hopkins ,  Daniel E. Ford

发明人： John T. Land ,  Ronald J. Hopkins ,  Daniel E. Ford

IPC分类号： G21C7/14 ,  G21C5/02 ,  G21C7/08 ,  G21C13/02 ,  G21C19/20

CPC分类号： G21C5/02 ,  G21C7/08 ,  G21Y2002/103 ,  G21Y2002/104 ,  G21Y2002/303 ,  G21Y2004/30 ,  G21Y2004/301 ,  Y02E30/39

摘要： A mounting system for removably mounting the lower flange of a control rod guide tube over an opening in the upper core plate of a nuclear reactor includes support pins having first and second pin portions. The first pin portion passes through the guide tube flange and has an externally threaded section. The second pin portion is secured within the bore of the upper core plate and has a solid body section and a split-leaf section. The solid body section has an outer diameter which is accommodated in the bore by a close clearance fit. The split-leaf section has a split intermediate section and a split end section. The split intermediate section extends from the solid body section, has an outer diameter which is less than the outer diameter of the solid body section, and tapers uniformly between the solid body section and the split end section to form a conical shape. The split end section biasingly engages at least a portion of the bore wall. A locking nut threadedly engages an externally threaded section of the first pin portion. A washer is disposed around the first pin portion between the locking nut and the control rod guide tube flange and includes a concave spherical upper surface which is shiftable during mounting of the locking nut to compensate for nonperpendicular alignment between the support pin and the control rod guide tube flange.

摘要翻译： 用于将控制棒引导管的下凸缘可拆卸地安装在核反应堆的上芯板中的开口上的安装系统包括具有第一和第二销部分的支撑销。 第一销部分穿过导管凸缘并具有外螺纹部分。 第二销部分固定在上部芯板的孔内，并具有固体部分和裂片部分。 固体部分具有通过紧密间隙配合容纳在孔中的外径。 分裂叶片部分具有分割中间部分和分割端部分。 分割中间部分从固体部分延伸，其外径小于固体部分的外径，并且在实体部分和分离端部之间均匀地变细，以形成圆锥形状。 分裂端部偏压地接合孔壁的至少一部分。 锁定螺母螺纹接合第一销部分的外螺纹部分。 垫圈设置在锁定螺母和控制杆引导管法兰之间的第一销部分周围，并且包括凹形球形上表面，该凹形球形上表面可在安装锁定螺母期间移位，以补偿支撑销和控制杆导向件之间的非垂直对准 管法兰。

公开(公告)号：US5034184A

公开(公告)日：1991-07-23

申请号：US368637

申请日：1989-06-20

申请人： Wayne W. Stevens ,  Charles W. Solbrig

发明人： Wayne W. Stevens ,  Charles W. Solbrig

IPC分类号： G21C7/16 ,  G21C7/20

CPC分类号： G21C7/20 ,  G21C7/16 ,  G21Y2002/303 ,  G21Y2004/302 ,  G21Y2004/40 ,  Y02E30/39

摘要： A high speed air cylinder in which the longitudinal movement of the piston within the air cylinder tube is controlled by pressurizing the air cylinder tube on the accelerating side of the piston and releasing pressure at a controlled rate on the decelerating side of the piston. The invention also includes a method for determining the pressure required on both the accelerating and decelerating sides of the piston to move the piston with a given load through a predetermined distance at the desired velocity, bringing the piston to rest safely without piston bounce at the end of its complete stroke.

摘要翻译： 通过对活塞的加速侧上的气缸管进行加压并以活塞的减速侧的受控速度释放压力来控制活塞在气缸管内的纵向移动的高速气缸。 本发明还包括一种用于确定活塞的加速和减速侧所需的压力的方法，以使给定负载以预期的速度移动预定距离的活塞，使活塞安全地停止，而在末端没有活塞反弹 的完成中风。

公开(公告)号：US4996021A

公开(公告)日：1991-02-26

申请号：US529406

申请日：1990-05-29

申请人： William J. Bryan

发明人： William J. Bryan

IPC分类号： G21C3/33

CPC分类号： G21C3/3305 ,  G21C3/33 ,  G21Y2002/303 ,  G21Y2004/301 ,  Y02E30/40

摘要： A pressurized water reactor fuel assembly (10) has a fastener or bolt (40) of stainless steel with a longitudinal groove (48) attaching zircaloy guide tubes (16) to stainless steel lower end fitting (14). The guide tubes have internally threaded zircaloy plugs (52) for mating with the threads (46) of bolt (40) with points (50) created in the threads (46) by groove (48) providing increased friction. The groove (48) acts to accommodate stresses set up by differential thermal expansion of zircaloy and stainless steel. Apertured stainless steel cups (60) receive the plugged ends of guide tubes (16) to capture them and provide connections to lower grid (22) of stainless steel.

摘要翻译： 压水反应堆燃料组件（10）具有不锈钢的紧固件或螺栓（40），其中纵向槽（48）将锆石导向管（16）连接到不锈钢下端配件（14）。 引导管具有用于与螺栓（40）的螺纹（46）配合的内螺纹的氧化锆塞（52），其中通过凹槽（48）在螺纹（46）中产生的点（50）提供增加的摩擦。 槽（48）用于适应由锆石和不锈钢的不同热膨胀设定的应力。 有孔的不锈钢杯（60）接收导管（16）的插入端以捕获它们并提供到不锈钢的下格栅（22）的连接。

公开(公告)号：US4963318A

公开(公告)日：1990-10-16

申请号：US342067

申请日：1989-04-24

申请人： Eric B. Johansson ,  Michael V. Curulla

发明人： Eric B. Johansson ,  Michael V. Curulla

IPC分类号： G21C3/33 ,  G21C3/334

CPC分类号： G21C3/334 ,  G21Y2002/302 ,  G21Y2002/303 ,  G21Y2002/40 ,  G21Y2004/301 ,  G21Y2004/50 ,  G21Y2004/60 ,  Y02E30/40

摘要： In a nuclear fuel bundle, an improved lock washer is disclosed for permitting ease of remote removal of hex nuts on tie rods for the remote submerged disassembly of fuel bundles after use in a reactor. The improved lock washer includes two spaced apart and interconnected tie rods surrounding washer members, each of these tie rod washer members having radially inwardly extending keys. These keys register to corresponding keyways in the threaded ends of the tie rods to prevent tie rod rotation and threaded disengagement from the lower tie plate. Each washer member is manufactured from a spring material and includes at least one and preferably two radially protruding tangs T. These tangs are elongate and bent in an inverted U-shaped configuration. The inverted U-shaped configuration commences at the washer member and extends upwardly and outwardly away from the hex bolt to be locked. Reversal of the spring member occurs at the end of the U with the spring member returning angularly back towards the tie rod. In the return toward the tie rod, a gradual inward slope defining a gathering surface between the tie rod and bolt on one hand and the U-shaped tang on the other hand is defined that the U-shaped tang. From the end of the gathering surface, the tang extends vertically downward in a position of spring interference with one of the flat sides of the hexagonal bolt holding the tie rod in place. When the tie rod washer is in place with the nut fastened, the tang prevents the bolt from turning responsive to vibration and upward force on the upper tie plate due to outflowing water and steam. In remote disassembly of the fuel bundle, the gathering surface permits the tang to be biased away from the sides of the bolt by a specialized socket that penetrates interstitially between the lock washer and nut and captures the nut when it is unscrewed. The lock washer because of its spring action returns to its initial shape after the socket and nut are removed. In contrast to the prior art lock washer, the lock washer tangs strains and deformations are elastic. The possibility of tang breakage is eliminated and the lock washers can be reused.

公开(公告)号：US4784825A

公开(公告)日：1988-11-15

申请号：US48478

申请日：1987-05-06

申请人： Gary J. Busselman ,  Adolfo Reparaz

发明人： Gary J. Busselman ,  Adolfo Reparaz

IPC分类号： G21C3/33 ,  G21C3/334 ,  G21C3/34 ,  G21C3/32

CPC分类号： G21C3/34 ,  G21C3/33 ,  G21C3/334 ,  G21Y2002/104 ,  G21Y2002/303 ,  G21Y2004/301 ,  G21Y2004/304 ,  G21Y2004/50 ,  Y02E30/40

摘要： The fuel rods located in areas of a nuclear reactor core where water jetting damage to the rods can occur are secured together by a clip, in order to change the mass subject to fretting damage. The change of mass changes the amplitude of the induced fuel rod vibration, thus reducing possible fuel rod fretting an/or damage. To repair such damage, the combination of clip(s) and an inert rod are used to replace a damaged fuel rod.

摘要翻译： 位于核反应堆核心区域中的燃料棒，其中可能发生水的喷射损坏可以通过夹子固定在一起，以便改变质量受到微动损坏。 质量的变化会改变感应燃料棒振动的振幅，从而减少可能的燃料棒磨损或损坏。 为了修复这种损坏，使用夹子和惰性杆的组合来代替损坏的燃料棒。

公开(公告)号：US4765949A

公开(公告)日：1988-08-23

申请号：US32689

申请日：1987-04-01

申请人： Jean-Pierre Denizou ,  Bruno Mouesca

发明人： Jean-Pierre Denizou ,  Bruno Mouesca

IPC分类号： G21C3/34 ,  G21C3/356

CPC分类号： G21C3/3563 ,  G21C3/34 ,  G21Y2002/303 ,  G21Y2004/30 ,  Y02E30/40

摘要： A spacing grid for a nuclear fuel assembly, particularly a water cooled assembly, includes two spaced sets of plates. Each set is formed of plates parallel to each other and fixed at their ends to a polygonal belt in the form of a strip having fins along one longitudinal edge at least. Each corner of the belt is free of openings. Two at least of the corners are rounded and located inside of imaginary extensions of the flat lateral faces of the belt. They are connected to the edges of the lateral faces by gussets sloping radially inwardly.

摘要翻译： 用于核燃料组件，特别是水冷却组件的间隔网格包括两个间隔开的板组。 每组由相互平行的板形成，并在其端部固定成带状的多边形带，至少具有沿着一个纵向边缘的翅片。 皮带的每个角都没有开口。 两个至少角部是圆形的并且位于带的平坦侧面的假想延伸部内部。 它们通过径向向内倾斜的角撑板连接到侧面的边缘。

公开(公告)号：US4762675A

公开(公告)日：1988-08-09

申请号：US50177

申请日：1987-05-15

申请人： Alexander L. Feild, Jr.

发明人： Alexander L. Feild, Jr.

IPC分类号： C23C16/04 ,  C23C16/18 ,  C23C16/28 ,  G21C3/18 ,  G21C3/06

CPC分类号： C23C16/18 ,  C23C16/045 ,  C23C16/28 ,  G21C3/18 ,  G21Y2002/104 ,  G21Y2002/303 ,  G21Y2004/10 ,  G21Y2004/20 ,  G21Y2004/201 ,  G21Y2004/40

摘要： A process for forming a boron-containing coating on the internal surface of a zirconium or zirconium alloy hollow tube by heating the internal surface to a temperature of between 200.degree.-450.degree. C. and passing through the tube a mixture of a volatilized boron compound in helium or argon, such that the boron compound decomposes to form an integral boron containing coating on the internal surface.

摘要翻译： 在锆或锆合金中空管的内表面上形成含硼涂层的方法是将内表面加热至200-450℃的温度，并通过管将挥发的硼化合物 在氦气或氩气中，使得硼化合物在内表面上分解形成一体的含硼涂层。

公开(公告)号：US4699757A

公开(公告)日：1987-10-13

申请号：US853082

申请日：1986-04-17

申请人： Jean-Marc Cloue

发明人： Jean-Marc Cloue

IPC分类号： G21C3/18 ,  G21C3/00

CPC分类号： G21C3/18 ,  G21Y2002/104 ,  G21Y2002/201 ,  G21Y2002/301 ,  G21Y2002/303 ,  G21Y2004/10 ,  G21Y2004/30 ,  Y02E30/40

摘要： A nuclear fuel rod has a sheath closed by end plugs and a stack of fuel pellets in the sheath. The stack is retained in abutment against one of the end plugs during handling of the fuel rod by a radially expandable element having a cross-sectional area in rest condition such as it frictionally engages an internal surface of said sheath. When the fuel rod is brought to the reactor operating temperature, the radially expandable element is contracted clear of frictional contact by temperature responsive means of a shape memory alloy operatively associated with said radially expandable element and having a transformation temperature above atmospheric temperature.

摘要翻译： 核燃料棒具有由端塞封闭的护套和护套中的一堆燃料颗粒。 在通过具有静止状态的横截面积的径向可扩张元件处理燃料棒的同时，将堆叠保持抵靠在一个端塞上，例如其摩擦地接合所述护套的内表面。 当燃料棒达到反应器工作温度时，通过可操作地与所述可径向扩张的元件相关并具有高于大气温度的相变温度的形状记忆合金的温度响应装置，可径向扩张的元件收缩而不受摩擦接触。

公开(公告)号：US4683115A

公开(公告)日：1987-07-28

申请号：US643888

申请日：1984-08-24

申请人： Gustav Fromel ,  Alexander Steinke

发明人： Gustav Fromel ,  Alexander Steinke

IPC分类号： G21C3/324 ,  G21C3/33 ,  G21C3/34

CPC分类号： G21C3/34 ,  G21C3/324 ,  G21C3/33 ,  G21Y2002/303 ,  G21Y2004/30 ,  Y02E30/40

摘要： Nuclear reactor fuel assembly having a grid-shaped spacer with square grid meshes, wherein mutually parallel rods are arranged, respectively, in a grid mesh, the spacer having flat outer straps extending transversely to the rods and an intermediate strip extending parallel to the rods between two of the respective outer straps, the intermediate strip being inclined relative to the two outer straps, including a rejection rise formed at the outside of the intermediate strip and extending in direction of a diagonal of a grid mesh located at a corner between the two outer straps, the rejection rise being disposed transversely to the two outer straps and being inclined downwardly towards two respective ends of the intermediate strip in longitudinal direction of the rods.

摘要翻译： 核反应堆燃料组件具有带有方格网格的网格间隔件，其中相互平行的杆分别布置在格栅网中，间隔件具有横向于杆延伸的平坦外带，和平行于棒之间延伸的中间带 相应的外带中的两个，中间带相对于两个外带倾斜，包括形成在中间带的外侧的排斥上升并且在位于两个外带之间的角部处的格栅的对角线的方向上延伸 带子，排斥上升横向于两个外带布置，并向下朝着杆的纵向方向向中间带的两个相应端倾斜。