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    Nuclear fuel elements having a composite cladding
    1.
    发明授权
    Nuclear fuel elements having a composite cladding 失效
    具有复合包层的核燃料元件

    公开(公告)号：US4406012A

    公开(公告)日：1983-09-20

    申请号：US228344

    申请日：1981-01-26

    申请人： Gerald M. Gordon ,  Robert L. Cowan, II ,  John H. Davies

    发明人： Gerald M. Gordon ,  Robert L. Cowan, II ,  John H. Davies

    IPC分类号： G21C3/06 ,  G21C3/20

    CPC分类号： G21C3/20 ,  G21C3/06 ,  Y02E30/40

    摘要： An improved nuclear fuel element is disclosed for use in the core of nuclear reactors. The improved nuclear fuel element has a composite cladding of an outer portion forming a substrate having on the inside surface a metal layer selected from the group consisting of copper, nickel, iron and alloys of the foregoing with a gap between the composite cladding and the core of nuclear fuel. The nuclear fuel element comprises a container of the elongated composite cladding, a central core of a body of nuclear fuel material disposed in and partially filling the container and forming an internal cavity in the container, an enclosure integrally secured and sealed at each end of said container and a nuclear fuel material retaining means positioned in the cavity. The metal layer of the composite cladding prevents perforations or failures in the cladding substrate from stress corrosion cracking or from fuel pellet-cladding interaction or both. The substrate of the composite cladding is selected from conventional cladding materials and preferably is a zirconium alloy.

    摘要翻译： 公开了用于核反应堆核心的改进的核燃料元件。 改进的核燃料元件具有形成衬底的外部部分的复合包层，所述衬底在内表面上具有选自铜，镍，铁的金属层和上述合金与复合材料包层和芯之间的间隙 的核燃料。 核燃料元件包括细长复合包层的容器，核燃料材料体的中心芯，其设置在容器中并部分地填充容器并在容器中形成内腔，外壳在所述容器内的每一端处一体地固定和密封 容器和位于空腔中的核燃料材料保持装置。 复合材料包层的金属层防止包层基体中的应力腐蚀开裂或燃料颗粒 - 包层相互作用或两者的穿孔或失效。 复合包层的基材选自常规包层材料，优选为锆合金。

    Hydride damage resistant fuel elements
    2.
    发明授权
    Hydride damage resistant fuel elements 失效
    耐氢化物损害燃料元素

    公开(公告)号：US5434897A

    公开(公告)日：1995-07-18

    申请号：US215450

    申请日：1994-03-21

    申请人： John H. Davies

    发明人： John H. Davies

    IPC分类号： G21C3/17 ,  G21C3/16 ,  G21C3/20 ,  G21C21/02 ,  G21C3/00

    CPC分类号： G21C3/16 ,  G21Y2002/207 ,  G21Y2002/303 ,  G21Y2004/30 ,  Y02E30/40

    摘要： A cladding tube is provided having an axis and a cross-section perpendicular to the axis. The cross-section includes (1) an outer circumferential substrate having an inner surface, (2) a zirconium barrier layer bonded to the inner surface of the outer circumferential substrate, and (3) an inner circumferential liner bonded to the inner surface of the zirconium barrier layer. The inner circumferential liner includes a plurality of facets aligned substantially in parallel with the cladding tube axis. The facets--which define the geometry of the cladding interior--facilitate mixing among the gases in the cladding interior. Also provided is a fuel element including (1) a cladding tube having an faceted inner liner as described above, (2) nuclear fuel material disposed within said cladding tube in a fuel region, and (3) a plenum or plenums located in one or both end regions (beyond the nuclear fuel region) within the cladding tube. In the event of steam entering the cladding interior, the plenum(s) serves as a reservoir making steam available to dilute locally high hydrogen/steam regions. At least a portion of the nuclear fuel is a uranium dioxide having an oxygen to uranium mole ratio in excess of 2.

    摘要翻译： 提供具有垂直于该轴线的轴线和横截面的包层管。 该截面包括（1）具有内表面的外周基板，（2）与外周基板的内表面接合的锆阻挡层，以及（3）内周衬垫， 锆阻挡层。 内周衬套包括与包层管轴线基本上平行排列的多个小面。 限定包层内部几何形状的小平面有助于在包层内部的气体之间进行混合。 还提供了一种燃料元件，其包括：（1）如上所述的具有小平面内衬的包层管，（2）燃料区中设置在所述包层管内的核燃料材料，以及（3）位于一个或多个 在包壳管内的两个端部区域（超过核燃料区域）。 在蒸汽进入包层内部的情况下，增压室用作储存器，使蒸汽可用于稀释局部高的氢/蒸汽区域。 至少一部分核燃料是氧铀摩尔比超过2的二氧化铀。

    Method for inspecting an article for concealed substances
    6.
    发明授权
    Method for inspecting an article for concealed substances 失效
    用于检查隐藏物品的物品的方法

    公开(公告)号：US5425263A

    公开(公告)日：1995-06-20

    申请号：US69477

    申请日：1993-06-01

    申请人： John H. Davies ,  Frank J. Kuja

    发明人： John H. Davies ,  Frank J. Kuja

    IPC分类号： G01N1/02 ,  G01N1/22 ,  G01N35/00 ,  G01V9/00 ,  G01N25/14

    CPC分类号： G01N1/2214 ,  G01V9/007 ,  G01N2001/024 ,  G01N2001/2223 ,  G01N35/00009

    摘要： There is provided an assembly for preferentially separating and collecting particles that are gathered from the surface of an article such as an item of baggage. The assembly features an impactor and a suction anvil that is displaceable from a collection medium. The anvil is displaceable from the collection medium so that the medium may be removed and analyzed for traces of substances such as explosives or narcotics. There is also provided, in combination with the assembly, a vacuum head and conduit for gathering the particles and a suction unit for creating the suction force. The collection medium containing collected particles is moved from the impactor to an analyzer by a stage movement device. The analyzer includes an analysis unit, such as an Ion Mobility Spectrometer, and a displaceable heater anvil.

    摘要翻译： 提供了用于优先分离和收集从诸如行李物品的物品的表面收集的颗粒的组件。 该组件具有可从收集介质移位的冲击器和吸砧。 砧座可以从收集介质中移位，以便可以移除介质并分析痕量物质如爆炸物或麻醉剂。 还提供了与组件结合的用于聚集颗粒的真空头和导管以及用于产生吸力的抽吸单元。 含有收集颗粒的收集介质通过载物台移动装置从冲击器移动到分析器。 分析仪包括分析单元，例如离子迁移率光谱仪和可置换的加热器砧座。

    Thermal-mechanical treatment of composite nuclear fuel element cladding
    8.
    发明授权
    Thermal-mechanical treatment of composite nuclear fuel element cladding 失效
    复合核燃料元件包层的热机械处理

    公开(公告)号：US4390497A

    公开(公告)日：1983-06-28

    申请号：US304011

    申请日：1981-09-21

    申请人： Herman S. Rosenbaum ,  John H. Davies

    发明人： Herman S. Rosenbaum ,  John H. Davies

    IPC分类号： C22F1/18 ,  G21C3/20

    CPC分类号： C22F1/186 ,  G21C3/20 ,  Y02E30/40

    摘要： Cladding for nuclear fuel elements which is formed with a zirconium metal barrier layer bonded to the inside surface of a zirconium alloy tube and which is sized by a cold working tube reduction process and is heat treated after final reduction at a temperature and for a time period which allows substantially complete recrystallization of the zirconium metal barrier layer and provides a fine-grained microstructure therein and which stress-relieves but does not fully recrystallize the zirconium alloy tube. The crystallographic structure of the zirconium metal barrier layer may be improved by compressive deformation such as shot-peening.

    摘要翻译： 形成有与锆合金管的内表面结合的锆金属阻隔层的核燃料元件的包层体，其通过冷加工管的还原工序而定，并在最终还原温度和时间段之后进行热处理 这允许锆金属阻挡层的基本上完全重结晶并且在其中提供细晶粒微结构，并且其应力消除但不完全重结晶锆合金管。 锆金属阻挡层的晶体结构可以通过诸如喷丸硬化的压缩变形来改善。

    Seat for use with a bathing device
    9.
    发明授权
    Seat for use with a bathing device 失效
    用于洗浴设备的座位

    公开(公告)号：US4168549A

    公开(公告)日：1979-09-25

    申请号：US892067

    申请日：1978-03-31

    申请人： John H. Davies

    发明人： John H. Davies

    IPC分类号： A47K3/12 ,  A61G7/10

    CPC分类号： A61G7/1003 ,  A47K3/122 ,  A61G7/1034 ,  A61G7/1044 ,  A61G7/1059

    摘要： The device comprises a track made up of two spaced rails adapted to extend across a bath. The spacing of the rails is fixed. There are stops on the underside of the track to contact the upper, inner sides of the bath to hold the track in place in the bath. A seat has wheels to engage the rails to enable the seat to reciprocate across the bath. There is a brake operable to hold the seat in a predetermined position on the track. The device is easily assembled and dismantled, easily used and simple in structure.

    摘要翻译： 该装置包括由适于延伸穿过浴的两个间隔的轨道构成的轨道。 轨道的间距是固定的。 轨道底部有停止点可以接触浴缸的上部内侧，以将轨道固定在浴缸中。 座椅具有用于接合轨道的轮子，以使座椅能够在浴缸中往复运动。 存在可操作以将座椅保持在轨道上的预定位置的制动器。 该装置易于组装和拆卸，使用方便，结构简单。