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    • 3. 发明授权
    • Hydride damage resistant fuel elements
    • 耐氢化物损害燃料元素
    • US5434897A
    • 1995-07-18
    • US215450
    • 1994-03-21
    • John H. Davies
    • John H. Davies
    • G21C3/17G21C3/16G21C3/20G21C21/02G21C3/00
    • G21C3/16G21Y2002/207G21Y2002/303G21Y2004/30Y02E30/40
    • 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.
    • 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。
    • 7. 发明授权
    • Nuclear fuel elements having a composite cladding
    • 具有复合包层的核燃料元件
    • US4406012A
    • 1983-09-20
    • US228344
    • 1981-01-26
    • Gerald M. GordonRobert L. Cowan, IIJohn H. Davies
    • Gerald M. GordonRobert L. Cowan, IIJohn H. Davies
    • G21C3/06G21C3/20
    • G21C3/20G21C3/06Y02E30/40
    • 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.
    • 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。
    • 9. 发明授权
    • Apparatus and method for screening people and articles to detect and/or to decontaminate with respect to certain substances
    • 用于筛选人和物品以检测和/或去除某些物质的方法
    • US06375697B2
    • 2002-04-23
    • US09389019
    • 1999-09-02
    • John H. Davies
    • John H. Davies
    • B01D3514
    • G01N1/2214B08B5/02G01N1/24G01N2001/024Y10S55/34
    • A walk-through portal or other enclosure is provided for at least one of detection of a predetermined substance on a subject and decontamination of a subject from a predetermined substance, the subject being either a person or, for other type of enclosure, an object, such as a suitcase. The walk-through portal defines an examination zone and can be substantially open on at least one side, to permit a subject readily to enter and to exit the examination zone. A closure closes off the examination zone from the exterior. An inlet into the examination zone and an outlet from the examination zone permit air or other gas to flow through it, and this is pumped by a pump, so as to entrain at least one of vapors and particulates from such substance. At least part of the exhaust through the outlet can be passed to an analyzer, such as an IMS, to detect substances of interest.
    • 提供了通过入口或其他外壳,用于检测被检体上的预定物质和从预定物质中去除污染物中的至少一种,所述物体是人,或者对于其它类型的封闭物, 如手提箱。 步行门户定义了检查区域,并且可以在至少一侧上基本上打开,以允许对象容易地进入并离开检查区域。 关闭关闭外部检查区。 进入检查区的入口和检查区的出口允许空气或其他气体流过其中,并且通过泵泵送,以便夹带至少一种蒸汽和颗粒物质。 通过出口的排气的至少一部分可以传递到诸如IMS的分析仪,以检测感兴趣的物质。