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    • 1. 发明授权
    • Modular radial neutron reflector
    • 模块式径向中子反射器
    • US4849162A
    • 1989-07-18
    • US670732
    • 1984-11-13
    • Daniel C. GarnerDonald G. SherwoodAlbert C. Davidson
    • Daniel C. GarnerDonald G. SherwoodAlbert C. Davidson
    • G21C5/08G21C7/28G21C11/02G21C11/06
    • G21C5/08G21C11/02G21C11/06Y02E30/40
    • Modular neutron reflector assemblies removably insertable into the irregular space in a nuclear reactor between a generally cylindrical array of square fuel assemblies comprising the core and the cylindrical core barrel surrounding the core, include an elongated enclosure having a strongback adjacent the core barrel and flat plates adjacent the fuel assemblies. The strongback is thicker than the steel plates by an amount which results in the strongback and plates reaching approximately the same temperature to minimize thermal stresses despite the 8 to 20 times greater nuclear heating at the core side of the enclosure as opposed to that at the core barrel side. The enclosure is suspended by a single point mounting on the core barrel which permits vertical, radial, and circumferential expansion but a pin depending from the lower end of the enclosure slides in a vertical bore in the reactor lower core support plate to limit lateral movement while allowing unrestrained vertical expansion and contraction. A separately removable reflector unit in each enclosure comprises a bundle of closely packed stainless steel circular rods with smaller diameter rods inserted in the interstices between the larger rods to generate a 0.90-0.92% volume fraction of stainless steel while also providing a distributed array of small longitudinal passages for reactor coolant. Selected rods are suspended from a cover plate on the module with the remaining rods suspended from a horizontal plate which is in turn, suspended from the selected rods so that the rods are all free to expand and contract vertically.
    • 模块化中子反射器组件可拆卸地插入核反应堆中的不规则空间中,该矩形中心反射器组件包括围绕芯的方形燃料组件的方形燃料组件的大致圆柱形阵列,其包括细长的壳体,其具有与核心筒相邻的强力和相邻的平板 燃料组件。 强度比钢板厚一些,导致强度和板达到大致相同的温度,以最小化热应力,尽管在外壳的核心侧与核心处的核加热相比,加热8至20倍 桶边。 外壳通过安装在芯筒上的单点悬挂,其允许垂直,径向和周向膨胀,但是从外壳的下端悬垂的销在反应器下芯支撑板中的垂直孔中滑动以限制横向移动,同时 允许无限制的垂直膨胀和收缩。 每个外壳中可分开拆卸的反射器单元包括紧密包装的不锈钢圆棒,其中较小直径的杆插入较大棒之间的空隙中以产生不锈钢的0.90-0.92%体积分数,同时还提供小的分布阵列 反应堆冷却液的纵向通道。 选定的杆悬挂在模块上的盖板上,剩余的杆悬挂在水平板上,水平板又悬挂在选定的杆上,使得杆可以自由地垂直地膨胀和收缩。
    • 2. 发明授权
    • Flexible rod guide support structure for inner barrel assembly of
pressurized water reactor
    • US4687628A
    • 1987-08-18
    • US923059
    • 1986-10-24
    • James E. GillettDaniel C. GarnerDonald G. Sherwood
    • James E. GillettDaniel C. GarnerDonald G. Sherwood
    • G21C7/117G21C19/28
    • G21C7/117G21Y2002/303G21Y2002/402G21Y2004/301Y02E30/32Y02E30/39
    • The inner barrel assembly of a pressurized water reactor includes an array of interleaved first and second matrices of respective first and second pluralities of rod guides of corresponding first and second different types, disposed in parallel axial relationship, the bottom ends of the guides being affixed to the top core plate of a lower barrel assembly. A flexible support structure connects the top ends of the rod guides to a lower calandria plate and particularly includes corresponding first and second pluralities of top support plates respectively connected to the rod guides of the first and second different types and having outer peripheries generally corresponding to the respective first and second types of rod guides and inner openings for permitting axial passage therethrough of corresponding, first and second different types of rod clusters. The respective top support plates of the first and second different types have mating, respective exterior and interior vertices for assemblage of same in an array of interdigitated, respective matrices. A flexible linkage is connected between each top plate of the first type and the respective surrounding and contiguous, interdigitated top plates of the second type, thereby interconnecting all of the top plates of the array in a concatenated arrangement. Stop pins received in aligned bores and extending between the interdigitized top plates limit the extent of load that can be applied to the linkage, and the ultimate extent of possible relative movement therebetween. Central recesses in top plates of the second type receive extensions from the lower calandria plate which establish basic alignment of the concatenated and interleaved matrices of top plates. Leaf springs secured to the calandria bottom plate engage and exert a downward force, at their outer ends, on the surfaces of the top plates of the second type for establishing a frictional force opposing lateral movement of the top plates of the second type and, correspondingly, through the concatenated and interleaved arrangement, the top plates of the first type, thereby opposing lateral movement while permitting restrained axial displacement of the individual rod guides.
    • 5. 发明授权
    • Vibration arrestor for rod guide support structure of the inner barrel
assembly of a pressurized water reactor
    • 用于压力水反应堆内筒组件的导杆支撑结构的振动抑制器
    • US4729868A
    • 1988-03-08
    • US817362
    • 1986-01-09
    • James E. GillettDaniel C. Garner
    • James E. GillettDaniel C. Garner
    • G21C7/14G21C1/08G21C5/02G21C5/10G21C7/00G21C7/20G21C15/02G21C1/01
    • G21C7/00G21C5/10G21Y2002/101G21Y2004/30Y02E30/32Y02E30/39
    • A vibration arrestor for use in combination with the support structure for the upper ends of rod guides disposed in parallel axial relationship in an inner barrel assembly of a pressurized water reactor vessel, the rod guides being supported between a first, lower plate and a second, upper plate with their respective top ends disposed adjacent the second plate. At least for a selected type of rod guides and associated top plates, apertures provided in the top plates receive therein corresponding extensions which depend from the second plate. Each vibration arrestor comprises a central hub having a central aperature received over the depending extension for each top plate of the selected type and includes at least a pair of spring arms integral with the central hub and extending therefrom in aligned, oppositely oriented directions and depending at corresponding angles therefrom, of a common length sufficient to engage the corresponding extremities thereof on the top plates received on the extensions of the predetermined array thereof aligned with the spring arms and positioned next adjacent the extension on which the central hub is received, the spring arms exerting a compression force on the engaged top plates, within a predetermined range, for resiliently opposing any reduction of the parallel spacing of those top plates from the second plate and for reacting lateral loads tending to displace the engaged top plates in a direction parallel to the second plate.
    • 一种用于与用于压力水反应堆容器的内筒组件中平行轴向关系的杆导向件的上端的支撑结构组合的减振器,所述杆引导件支撑在第一,下板和第二之间, 上板,它们各自的顶端邻近第二板设置。 至少对于选定类型的杆引导件和相关联的顶板,设置在顶板中的孔容纳有从第二板取决于的对应延伸部。 每个防振器包括中心毂,其具有中心温度,该中心温度被接收在所选择类型的每个顶板的悬垂延伸部上,并且包括至少一对与中心毂一体的弹簧臂,并且以对准的相对定向的方向从其延伸并且依赖于 相应的角度,其长度足以使其接收在与弹簧臂对准的预定阵列的延伸部上的顶板上相应的末端接合,并且邻近其中容纳中心轮毂的延伸部定位,弹簧臂 在预定范围内对所接合的顶板施加压缩力,以弹性地相对于这些顶板与第二板的平行间距的任何减小,并且用于使横向负载反转,以使得所接合的顶板沿平行于 第二盘。