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41. 发明授权

US4814138A Method for repairing a nuclear reactor fuel assembly and a replacement rod for performing the method 失效
标题翻译：用于修复核反应堆燃料组件的方法和用于执行该方法的替换棒
公开(公告)号：US4814138A
公开(公告)日：1989-03-21
申请号：US068841
申请日：1987-07-01
申请人： Peter Fick , Klaus Knecht
发明人： Peter Fick , Klaus Knecht
IPC分类号： G21C3/33 , G21C3/334 , G21C3/335 , G21C19/105 , G21C19/26 , G21C3/12 , G21C3/32
CPC分类号： G21C3/335 , G21C19/105 , G21C19/207 , G21C19/26 , G21C3/33 , G21C3/334 , G21Y2002/302 , G21Y2002/40 , G21Y2004/30 , G21Y2004/40 , G21Y2004/50 , Y02E30/40
摘要： In a nuclear reactor fuel assembly having a fuel rod filled with nuclear fuel retained in a gap formed in a lattice-like spacer by a spring disposed in the gap, the fuel assembly is repaired by replacing the fuel rod with a replacement rod and the replacement rod is retained in the gap of the spacer with a retaining spring.
摘要翻译：在具有填充有核燃料的燃料棒的核反应堆燃料组件中，所述燃料棒通过布置在间隙中的弹簧保持在形成在格子状间隔件中的间隙中，燃料组件通过用替换杆替换燃料棒并进行更换杆用保持弹簧保持在间隔件的间隙中。

42. 发明授权

US4792428A Nuclear fuel assembly with a free end grid 失效
标题翻译：具有自由端网格的核燃料组件
公开(公告)号：US4792428A
公开(公告)日：1988-12-20
申请号：US90054
申请日：1987-08-27
申请人： Jean-No/e/ l Canat , Jo/e/ l Pla
发明人： Jean-No/e/ l Canat , Jo/e/ l Pla
IPC分类号： G21C3/34 , G21C3/33 , G21C3/356
CPC分类号： G21C3/33 , G21Y2002/201 , G21Y2002/303 , G21Y2004/30 , Y02E30/40
摘要： A nuclear fuel assembly comprising a plurality of fuel elements, a structure having an upper end piece and a lower end piece rigidly connected together by tie rods and a plurality of spacing grids. The plurality of spacing grids comprises two end grids, one being connected to the fuel elements and secured to the tie rods and the other being connected to the fuel elements and slidably received by the tie-rods, and a plurality of intermediate grids secured to the tie-rods and slidably received by the fuel elements. The bundle of fuel elements can extend and retract from the end grid which is secured to the tie rods while being maintained and supported by the structure.
摘要翻译：一种核燃料组件，包括多个燃料元件，具有通过拉杆和多个间隔网格刚性连接在一起的上端件和下端件的结构。多个间隔格栅包括两个末端格栅，一个连接到燃料元件并固定到拉杆上，另一个连接到燃料元件，并被拉杆可滑动地接收，并且多个中间格栅固定到连杆，并被燃料元件可滑动地接收。燃料元件束可以从固定到拉杆上的端部格栅延伸和缩回，同时被结构保持和支撑。

43. 发明授权

US4716017A Apparatus for securing structural tubes in nuclear reactor fuel assemblies 失效
标题翻译：用于在核反应堆燃料组件中固定结构管的装置
公开(公告)号：US4716017A
公开(公告)日：1987-12-29
申请号：US790682
申请日：1985-10-23
申请人： John S. Kerrey
发明人： John S. Kerrey
IPC分类号： G21C3/33 , G21C3/334 , G21C3/32 , B21D39/00
CPC分类号： G21C3/334 , G21C3/33 , Y02E30/40 , Y10T29/4994 , Y10T29/531 , Y10T29/53996
摘要： An insert for providing a reduced inside diameter for a structural tube, specifically an instrumentation guide tube, of a nuclear fuel assembly. The insert has forming lobes which coact with the structural tube to plastically deform the structural tube and mechanically lock it with respect to grid straps of a grid assembly. The insert also has centering lobes to prevent it from being expanded in other than a coaxial alignment with the structural tube. An expansion tool is provided for sequentially registering with and expanding sequential forming lobes in a simplified manner whereby all of the operations necessary to assemble the structural tube in the fuel assembly can be easily and accurately performed.
摘要翻译：一种用于为核燃料组件的结构管，特别是仪器引导管提供减小的内径的插入件。插入件具有形成的凸角，其与结构管共同作用以使结构管塑性变形并相对于电网组件的网格带机械地将其锁定。插入件还具有定心凸角，以防止其与结构管不同轴线对准而膨胀。提供了一种膨胀工具，用于以简化的方式依次配准和扩展顺序的成形凸角，从而可以容易且精确地执行将燃料组件中的结构管组装所需的所有操作。

44. 发明授权

US4702880A Process for improving resistance of split pins to stress corrosion cracking 失效
标题翻译：改善裂纹针对应力腐蚀开裂的阻力的工艺
公开(公告)号：US4702880A
公开(公告)日：1987-10-27
申请号：US882256
申请日：1986-07-07
申请人： Jan S. Porowski , Manu L. Badlani , William J. O'Donnell , Edward J. Hampton
发明人： Jan S. Porowski , Manu L. Badlani , William J. O'Donnell , Edward J. Hampton
IPC分类号： G21C3/33 , G21C5/02 , G21C1/04
CPC分类号： G21C5/02 , G21C3/33 , G21Y2002/103 , G21Y2004/201 , Y02E30/40 , Y10S376/90
摘要： A process for improving resistance of control rod guide tube split pins in nuclear reactors to stress corrosion cracking comprising heating the split pin to a critical elevated temperature level, cooling at least the surface portions of the split subject to stress corrosion cracking and then permitting the split pin to come to ambient temperature.
摘要翻译：一种用于改善核反应堆中的控制棒导向管分裂销的应力腐蚀开裂的阻力的方法，包括将裂口销加热到临界升高的温度水平，至少将裂缝的表面部分冷却至应力腐蚀开裂，然后允许分裂引脚到达环境温度。

45. 发明授权

US4699760A Fuel assembly skeleton with structural and non-structural top nozzle/guide thimble joints 失效
标题翻译：燃油组件骨架与结构和非结构顶部喷嘴/导向套管接头
公开(公告)号：US4699760A
公开(公告)日：1987-10-13
申请号：US797333
申请日：1985-11-12
申请人： John M. Shallenberger , Stephen J. Ferlan
发明人： John M. Shallenberger , Stephen J. Ferlan
IPC分类号： G21C3/33 , G21C3/334 , G21C3/32
CPC分类号： G21C3/334 , G21Y2002/303 , G21Y2004/501 , G21Y2004/60 , Y02E30/40
摘要： A fuel assembly skeleton includes a top nozzle, a number of longitudinally-extending guide thimbles having upper ends, a number of joints interconnecting the top nozzle and the upper ends of the guide thimbles. All but a few of the joints are structural joints providing rigid connections between all but a corresponding few of the guide thimble upper ends and the top nozzle. Each of the other few joints is a non-structural joint providing a non-rigid connection between a guide thimble upper end and the top nozzle. The number of structural joints constitutes at least a substantial majority of the joints and, in any event, the number is at least three times the number of non-structural joints. Each non-structural joint is composed of a hollow sleeve rigidly connected to the top nozzle and disposed in a slip fit relationship about the guide thimble upper end. The sleeve is bulge fitted in a passageway defined in the top nozzle.
摘要翻译：燃料组件骨架包括顶部喷嘴，多个纵向延伸的导向套管，其具有上端，多个接头，其将顶部喷嘴与引导套管的上端相互连接。除了几个接头之外，除了相应的几个导向套管上端和顶部喷嘴之外，所有接头之间的结构接头都提供刚性连接。其他几个关节中的每一个都是非导向套管上端和顶部喷嘴之间提供非刚性连接的非结构关节。结构接头的数量构成至少大部分接头，并且在任何情况下，该数量至少是非结构接头数量的三倍。每个非结构接头由刚性地连接到顶部喷嘴的中空套筒组成，并且围绕导向套管上端以滑动配合关系设置。套筒凸起装配在顶部喷嘴中限定的通道中。

46. 发明授权

US4699759A Double lock joint for attaching top nozzle to guide thimbles of nuclear fuel assembly 失效
公开(公告)号：US4699759A
公开(公告)日：1987-10-13
申请号：US744082
申请日：1985-06-12
申请人： Alexander L. Feild, Jr.
发明人： Alexander L. Feild, Jr.
IPC分类号： G21C3/33 , G21C3/334 , G21C3/32
CPC分类号： G21C3/334 , G21Y2002/302 , G21Y2002/303 , G21Y2004/301 , Y02E30/40
摘要： A double lock joint structure is used in a reconstitutable fuel assembly for attaching the adapter plate of the assembly top nozzle in releasable locking engagement upon the upper end portions of the assembly guide thimbles. The joint structure includes axially extending slots defined in each guide thimble upper end portion permitting inward elastic collapse thereof to a compressed position and outward elastic return thereof to an expanded position. The joint structure also includes axially spaced upper and lower annular bulges formed in the upper end portion. The upper annular bulge has an outside diametric size greater than the inside diametric size of the adapter plate passageway when the guide thimble upper end portion is at its expanded position and less than the inside diametric size of the adapter plate passageway when the upper end portion is collapsed to its compressed position allowing insertion and withdrawal of the upper end portion into and from the adapter plate passageway. The lower annular bulge has an outside diametric size greater than the inside diametric size of the adapter plate passageway when the guide thimble upper end portion is at either one of its expanded and collapsed positions. The upper annular bulge is axially displaced from the lower annular bulge through a distance approximately equal to that between the top and bottom surfaces of the adapter plate such that after insertion of the upper end portion of the guide thimble through the adapter plate passageway the adapter plate is placed in a captured position between the upper and lower annular bulges. Furthermore, the joint structure includes a locking tube insertable into and removable from each guide thimble upper end portion between a locking position which maintains the upper end portion in the expanded position and the adapter plate in the captured position between the upper and lower annular bulges and an unlocking position which permits the upper end portion to inwardly collapse to the compressed position upon insertion and removal of the adapter plate onto and from the upper end portion of the guide thimble. The locking tube includes upper and lower axially displaced protuberances adapted to mate with the upper and lower bulges of the guide thimble upper end portion when the locking tube is inserted at its locking position therein, and a top annular flange located above the upper protuberance for facilitating insertion and removal of the tube into and from the guide thimble upper end portion.

47. 发明授权

US4699758A Reusable locking tube in a reconstitutable fuel assembly 失效
标题翻译：可重复使用的锁定管在可重构的燃料组件中
公开(公告)号：US4699758A
公开(公告)日：1987-10-13
申请号：US719108
申请日：1985-04-02
申请人： John M. Shallenberger , Stephen J. Ferlan
发明人： John M. Shallenberger , Stephen J. Ferlan
IPC分类号： G21C3/33 , G21C3/334 , G21C3/32
CPC分类号： G21C3/334 , G21Y2002/302 , G21Y2002/40 , G21Y2002/601 , G21Y2004/301 , G21Y2004/60 , Y02E30/40 , Y10S285/921
摘要： In a reconstitutable fuel assembly, a top nozzle attaching structure, which has an outer socket formed by a circumferential groove defined in the top nozzle adapter plate passageway wall and an inner socket formed by a circumferential bulge defined in the guide thimble upper end portion being capable of seating within the circumferential groove, incorporates an improved reusable tube disposable at a locking position for releasably locking the inner socket in locking engagement within the outer socket when the circumferential bulge is seated within the circumferential groove. The reusable locking tube includes an elongated hollow metal tubular body and at least a pair of small dimples preformed on the tubular body exterior prior to initial insertion of the locking tube to its locking position. The dimples are so preformed and configured to have a generally pyramidal shape such that the metal forming the dimples substantially resists yielding and dimensional change regardless of the number of insertions and withdrawals of the tubular body into and from the locking position. Also, the dimples are located along the exterior of the tubular body and have outer tips diametrically displaced from one another across the tubular body such that when the body is inserted to the locking position, the dimples extend into the circumferential bulge defined in the guide thimble upper end portion and provide a positive interference fit with the guide thimble upper end portion above the circumferential bulge therein and with the upper portion of the adapter plate passageway wall which prevents inadvertent withdrawal of the tubular body from the locking position.
摘要翻译：在可重构的燃料组件中，顶部喷嘴附接结构具有由限定在顶部喷嘴适配器板通道壁中的周向槽形成的外部插座和由限定在导向套管上端部中的圆周凸起形成的内部插座，在周向凹槽中的座位结合了一个改进的可重复使用的管，其在锁定位置处一次性，以便当周向隆起位于周向凹槽内时，可释放地将内部插座锁定在外部插座内。可重复使用的锁定管包括细长的中空金属管状体和在将锁定管初次插入其锁定位置之前预先形成在管状体外部的至少一对小凹坑。凹坑被预先形成并且构造成具有大致金字塔形状，使得形成凹坑的金属基本上抵抗屈服和尺寸变化，而不管管状体进入和离开锁定位置的插入和取出的数量。此外，凹坑沿着管状体的外部设置并且具有穿过管状体的彼此径向位移的外部尖端，使得当主体插入到锁定位置时，凹部延伸到限定在导向套筒中的圆周凸起中并提供与其周向凸起上方的导向套管上端部分的正的过盈配合，以及适配器板通道壁的上部，其防止管状体从锁定位置的意外撤回。

48. 发明授权

US4687631A Top nozzle mounted reusable fastener device in a reconstitutable nuclear fuel assembly 失效
公开(公告)号：US4687631A
公开(公告)日：1987-08-18
申请号：US775209
申请日：1985-09-12
申请人： John F. Wilson , Robert K. Gjertsen , Harry M. Ferrari
发明人： John F. Wilson , Robert K. Gjertsen , Harry M. Ferrari
IPC分类号： G21C3/33 , G21C3/334 , G21C3/32
CPC分类号： G21C3/334 , Y02E30/40 , Y10T403/1683 , Y10T403/589
摘要： A reusable fastener device includes an attachment nut and a retainer housing mounted to the adapter plate of the fuel assembly top nozzle and removable with the top nozzle upon reconstitution of the fuel assembly. The attachment nut has a central tubular stem and upper and lower flanges connected to and extending radially outwardly from opposite ends of the stem. The stem is internally threaded for mating with the threaded upper end plug extension of the strucutural member. The upper flange of the nut has a conical-shaped lower surface and a periphery adapted for engagement in order to rotate the nut for threading onto and unthreading from the structural member extension between fastened and unfastened positions. The lower flange of the nut is in the form of a plurality of radial segments extending outwardly from the stem and angularly spaced from one another so as to define a plurality of cutouts therebetween which alternate with the segments. The retainer housing has a tubular hollow body and a plurality of upper sectors and lower tabs connected to and extending respectively radially inwardly and outwardly from opposite ends of the tubular body. The upper sectors are angularly spaced from one another so as to define a plurality of openings sized to receive the radial segments of the nut therethrough. Also, the upper sectors extend radially inwardly from the tubular body so as to define a central opening sized to receive the central stem of the nut and to define an interrupted conical-shaped upper surface surrounding the central opening which matches the conical-shaped lower surface on the upper flange of the nut. The lower tabs rest upon and are rigidly connected to the top nozzle adapter plate so as to align the central opening of the retainer housing with the hole through the adapter plate and dispose the upper sectors in a location spaced from the adapter plate at which their interrupted conical-shaped upper surface will be contacted by the conical-shaped lower surface of the upper flange of the nut when the central stem thereof is threaded onto the upper end extension of the structural member to the fastened position. The upper sectors are yieldably deflectible upon being contacted by the upper flange of the nut such that inner edges of the upper sectors engage the central stem of the nut so as to rotationally lock the lower flange of the nut to the adapter plate when the nut is rotated to its fastened position. Finally, the retainer housing also includes auxiliary tabs attached to the upper sectors and being bendable between open and closed positions for respectively allowing and preventing passage of the lower segments of the nut through the openings defined between the upper sectors of the retainer housing.

49. 发明授权

US4684504A Bow resistant structural member for fuel assemblies in non-control rod locations of a nuclear reactor core 失效
标题翻译：核反应堆核心的非控制杆位置的燃料组件的弓形结构构件
公开(公告)号：US4684504A
公开(公告)日：1987-08-04
申请号：US748855
申请日：1985-06-26
申请人： John F. Wilson , Robert K. Gjertsen , Harry M. Ferrari
发明人： John F. Wilson , Robert K. Gjertsen , Harry M. Ferrari
IPC分类号： G21C3/33 , G21C3/16 , G21C3/30 , G21C3/326 , G21C3/32
CPC分类号： G21C3/326 , G21C3/16 , G21Y2002/303 , G21Y2004/30 , Y02E30/38
摘要： A fuel assembly for use at non-control rod locations of a nuclear reactor core includes top and bottom nozzles and longitudinal structural members extending between and attached to the nozzles for forming an integral unitary structure. One or more of the structural members includes an elongated hollow cladding tube extending between the top and bottom nozzles and end plugs secured to opposite ends of the tube for hermetically sealing and attaching the tube to the top and bottom nozzles. The improvements in the structural member relate to features for reducing fuel assembly bow. Such features relate to a quantity of thermal or irradiation-induced creep resistant material and pretensioning means positioned within the tube. The creep resistant material is a ceramic material in stacked pellet form and coated with a burnable adsorber material. The pretensioning means applies a predetermined compressive load to the ceramic pellet stack and reacts the load so as to preload the tube in a state of pretension having a magnitude sufficient to substantially counteract an axial load typically transmitted through the unitary structure of the fuel assembly and thereby greatly reduce the compressive stress in the structural member tube. There are two embodiments of the pretensioning means. In one embodiment, it is an elongated bellows type device positioned within the tube between the ceramic pellet stack and one of the tube ends, with the interior of the bellows type device being pressurized to create a predetermined axial force therein which places the ceramic pellet stack in compression and the tube in the state of pretension. In the other embodiment, it is an arrangement of belleville springs positioned within the tube between the ceramic pellet stack and one of the tube ends and stacked both in series and in parallel.
摘要翻译：在核反应堆核心的非控制杆位置使用的燃料组件包括顶部和底部喷嘴以及在喷嘴之间延伸并连接到喷嘴上以形成整体单一结构的纵向结构构件。一个或多个结构构件包括在顶部和底部喷嘴之间延伸的细长的中空包层管，以及固定到管的相对端的端塞，用于将管密封并附接到顶部和底部喷嘴。结构构件的改进涉及用于减少燃料组件弓的特征。这些特征涉及一定量的热或照射诱导的抗蠕变材料和位于管内的预张紧装置。抗蠕变材料是层叠的颗粒形式的陶瓷材料，并涂覆有可燃的吸附材料。预张紧装置将预定的压缩载荷施加到陶瓷颗粒堆叠并且使负载反应，以便在预紧力的状态下对管进行预加载，其尺寸足以基本上抵消通常通过燃料组件的整体结构传递的轴向载荷，从而大大降低了结构件管中的压应力。预紧装置有两个实施例。在一个实施例中，它是一个细长的波纹管式装置，其位于陶瓷颗粒堆叠与管端之一内的管内，波纹管型装置的内部被加压以在其中产生预定的轴向力，将陶瓷颗粒堆叠在压缩和管中处于预紧状态。在另一个实施例中，它是布置在管内的贝氏体弹簧的布置在陶瓷颗粒堆叠和管端之一之间，并且彼此串联并联。

50. 发明授权

US4684501A Compliant inserts mounted in upper tie plate of BWR fuel assembly 失效
标题翻译：安装在BWR燃油组件的上连接板上的合规插入件
公开(公告)号：US4684501A
公开(公告)日：1987-08-04
申请号：US802560
申请日：1985-11-27
申请人： Chun K. Lui
发明人： Chun K. Lui
IPC分类号： G21C3/33 , G21C3/32
CPC分类号： G21C3/3315 , Y02E30/40
摘要： A fuel assembly has a plurality of elongated fuel rods, a plurality of grid structures axially spaced from one another along the fuel rods between opposite ends thereof and supporting the fuel rods in a side-by-side spaced array, and a pair of tie plates disposed at the respective opposite ends of the fuel rods. Each of the fuel rods has a pair of end plugs sealing opposite ends thereof, with at least the end plug at one of the opposite ends of each fuel rod having an extension member thereon which extends axially outward from the end plug and is of a diameter less than that of the fuel rod. At least one of the tie plates has a plurality of holes defined by endless sidewalls formed therethrough between opposite sides of the tie plate and in an array which matches that of the fuel rods. A compliant insert is disposed in each hole in the one tie plate and engaged with the tie plate and the end plug extension member so as to yieldably support the extension member within the hole in spaced relationship from the hole sidewall. The compliant insert includes a plurality of spring members. In one embodiment, the spring members are separate from one another, whereas in another embodiment, the spring members are integrally connected to one another.
摘要翻译：燃料组件具有多个细长的燃料棒，多个格栅结构沿其燃料棒在其相对端之间彼此轴向间隔开并且以并排的间隔的阵列支撑燃料棒，以及一对连接板设置在燃料棒的相应的相对端。每个燃料棒具有密封其相对端的一对端塞，至少每个燃料棒的相对端之一的端塞在其上具有从端塞轴向向外延伸的延伸构件，并且具有直径小于燃料棒。至少一个连接板具有多个孔，该多个孔由连接板的相对侧之间穿过的环形侧壁限定，并且与阵列中的燃料棒的阵列相匹配。柔性插入件设置在一个连接板中的每个孔中并且与连接板和端塞延伸构件接合，以便以与孔侧壁间隔的关系可靠地支撑在孔内的延伸构件。柔性插入件包括多个弹簧构件。在一个实施例中，弹簧构件彼此分离，而在另一个实施例中，弹簧构件彼此一体地连接。

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