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    FORMATION OF BORON CARBIDE NANOPARTICLES FROM A BORON ALKOXIDE AND A POLYVINYL ALCOHOL
    2.
    发明申请
    FORMATION OF BORON CARBIDE NANOPARTICLES FROM A BORON ALKOXIDE AND A POLYVINYL ALCOHOL 审中-公开

    公开(公告)号：US20180065857A1

    公开(公告)日：2018-03-08

    申请号：US15692870

    申请日：2017-08-31

    申请人： COMMISSARIAT A L'ENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVES

    发明人： Olivier Poncelet ,  Pascal Fugier ,  Jonathan Skrzypski

    IPC分类号： C01B32/991 ,  B01J13/00 ,  G21F1/06

    CPC分类号： C01B32/991 ,  B01J13/0065 ,  C01P2004/64 ,  G21F1/06

    摘要： The present invention relates to a process for the preparation of boron carbide nanoparticles, characterized in that it comprises at least the stages consisting in: (i) interacting boric acid, boron oxide B2O3 or a boric acid ester of B(OR)3 type, with R, which are identical or different, representing C1-4-alkyl groups, with 1 to 2 molar equivalents of at least one C2 to C4 polyol, under conditions favorable to the formation of a boron alkoxide powder; (ii) interacting, in an aqueous medium, the boron alkoxide powder obtained on conclusion of stage (i) with an effective amount of one or more completely hydrolyzed polyvinyl alcohols, with a molar mass of between 10 000 and 80 000 g.mol−1, under conditions favorable to the formation of a crosslinked PVA gel, and (iii) carrying out an oxidizing pyrolysis of the crosslinked gel formed on conclusion of the preceding stage (ii), under conditions favorable to the formation of the CB4 nanoparticles.

    Nanostructured glass ceramic neutron shield for down-hole thermal neutron porosity measurement tools
    5.
    发明授权
    Nanostructured glass ceramic neutron shield for down-hole thermal neutron porosity measurement tools 有权
    用于井下热中子孔隙度测量工具的纳米结构玻璃陶瓷中子屏蔽

    公开(公告)号：US09575207B1

    公开(公告)日：2017-02-21

    申请号：US15062373

    申请日：2016-03-07

    申请人： Maxim Vasilyev ,  Valery Khabashesku ,  Mikhail Korjik ,  Andrei Fedorov

    发明人： Maxim Vasilyev ,  Valery Khabashesku ,  Mikhail Korjik ,  Andrei Fedorov

    IPC分类号： G01V5/10 ,  G01V5/06 ,  G21K1/06 ,  G21F1/06

    CPC分类号： G01V5/107 ,  C03C3/062 ,  C03C3/078 ,  C03C3/095 ,  C03C10/00 ,  G01V5/101 ,  G21F1/06

    摘要： An apparatus for providing a signal indicative of a property of an earth formation includes: a carrier conveyable through a borehole; a neutron source disposed on the carrier and configured to emit neutrons into the earth formation; a radiation detector disposed on the carrier and configured to detect radiation from the earth formation due to interaction of emitted neutrons with the earth formation and to provide the signal indicative of the property; and a neutron shield configured to shield the radiation detector from emitted neutrons that did not interact with the earth formation; wherein the radiation detector shield includes a glass ceramic material having a plurality of nano-crystallites, each nano-crystallite in the plurality having a periodic crystal structure with a diameter or dimension that is less than 1000 nm that includes Li and/or Boron and a rare-earth element that have positions in the periodic crystal structure of each nano-crystallite.

    摘要翻译： 用于提供指示地球物理特性的信号的装置包括：可通过钻孔传送的载体; 中子源，设置在载体上并且构造成将中子发射到地层中; 放射线检测器，设置在所述载体上并且被配置为检测由于发射的中子与地球相互作用而产生的地球的辐射并且提供指示所述性质的信号; 以及中子屏蔽，被配置为屏蔽辐射探测器与未与地层相互作用的发射中子; 其中所述辐射检测器屏蔽包括具有多个纳米微晶的玻璃陶瓷材料，其中每个纳米微晶具有包括Li和/或硼的直径或尺寸小于1000nm的周期性晶体结构，和 在每个纳米微晶的周期性晶体结构中具有位置的稀土元素。

    SNAP-IN INSERT FOR REACTIVITY CONTROL IN SPENT NUCLEAR FUEL POOLS AND CASKS
    6.
    发明申请
    SNAP-IN INSERT FOR REACTIVITY CONTROL IN SPENT NUCLEAR FUEL POOLS AND CASKS 有权
    用于燃料核燃料池和储罐的反应性控制的SNAP-IN插件

    公开(公告)号：US20130343503A1

    公开(公告)日：2013-12-26

    申请号：US13925585

    申请日：2013-06-24

    申请人： Holtec International, Inc.

    发明人： Stephen J. AGACE ,  Stephen E. THOMPSON ,  John D. GRIFFITHS ,  Richard M. SPRINGMAN

    IPC分类号： G21F5/012

    CPC分类号： G21F5/012 ,  G21C19/07 ,  G21C19/40 ,  G21F1/06 ,  G21F1/08

    摘要： A neutron absorbing apparatus, for insertion into a fuel cell storage system, includes a corner spine, a first all and a second wall, each wall being affixed to the corner spine to form a chevron shape. Each wall includes an absorption sheet affixed to the corner spine, each absorption sheet being formed of a metal matrix composite having neutron absorbing particulate reinforcement, and a guide sheet affixed to and covering a fractional upper portion of the absorption sheet and extending over a top of the absorption sheet. The absorption sheet extends along the corner spine a greater length than the guide sheet.

    摘要翻译： 用于插入到燃料电池存储系统中的中子吸收装置包括拐角脊，第一全壁和第二壁，每个壁都固定在拐角脊上以形成人字形。 每个壁都包括固定在拐角脊上的吸收片，每个吸收片由具有中子吸收粒子增强物的金属基质复合体形成，以及一个引导片，该引导片固定并覆盖吸收片的分数上部， 吸收片。 吸收片沿着拐角脊线延伸比引导片更大的长度。

    Composite materials and techniques for neutron and gamma radiation shielding
    8.
    发明申请
    Composite materials and techniques for neutron and gamma radiation shielding 有权
    用于中子和γ射线屏蔽的复合材料和技术

    公开(公告)号：US20050258405A1

    公开(公告)日：2005-11-24

    申请号：US11121852

    申请日：2005-05-04

    申请人： Dasharatham Sayala

    发明人： Dasharatham Sayala

    IPC分类号： G21F5/00

    CPC分类号： G21F1/00 ,  G21F1/02 ,  G21F1/04 ,  G21F1/06 ,  G21F1/08 ,  G21F1/10 ,  G21Y2002/10 ,  G21Y2002/304 ,  G21Y2004/10

    摘要： This invention deals with multi-component composite materials and techniques for improved shielding of neutron and gamma radiation emitting from transuranic, high-level and low-level radioactive wastes. Selective naturally occurring mineral materials are utilized to formulate, in various proportions, multi-component composite materials. Such materials are enriched with atoms that provide a substantial cumulative absorptive capacity to absorb or shield neutron and gamma radiation of variable fluxes and energies. The use of naturally occurring minerals in synergistic combination with formulated modified cement grout matrix, polymer modified asphaltene and maltene grout matrix, and polymer modified polyurethane foam grout matrix provide the radiation shielding product. These grout matrices are used as carriers for the radiation shielding composite materials and offer desired engineering and thermal attributes for various radiation management applications.

    摘要翻译： 本发明涉及用于改善从超铀，高水平和低放射性废物排放的中子和γ辐射屏蔽的多组分复合材料和技术。 选择性天然存在的矿物材料用于以多种比例配制多组分复合材料。 这些材料富含原子，这些原子提供了大量的累积吸收能力来吸收或屏蔽可变通量和能量的中子和γ辐射。 使用天然存在的矿物质与配制的改性水泥浆料基质，聚合物改性沥青质和麦芽浆浆料基质以及聚合物改性聚氨酯泡沫浆料基质协同组合提供辐射屏蔽产品。 这些灌浆基质用作辐射屏蔽复合材料的载体，并为各种辐射管理应用提供所需的工程和热属性。

    Neutron and gamma radiation shielding material, structure, and process of making structure
    9.
    发明授权
    Neutron and gamma radiation shielding material, structure, and process of making structure 失效
    中子和γ辐射屏蔽材料，结构和制作结构的过程

    公开(公告)号：US4437013A

    公开(公告)日：1984-03-13

    申请号：US280576

    申请日：1981-07-06

    申请人： Hugh L. Hondorp

    发明人： Hugh L. Hondorp

    IPC分类号： G21F1/06 ,  G21C11/00 ,  G21F3/02

    CPC分类号： G21F1/06

    摘要： The present invention is directed to a novel neutron and gamma radiation elding material consisting of 95 to 97 percent by weight SiO.sub.2 and 5 to 3 percent by weight sodium silicate. In addition, the method of using this composition to provide a continuous neutron and gamma radiation shielding structure is disclosed.

    摘要翻译： 本发明涉及一种新型的中子和γ辐射屏蔽材料，其由95-97重量％的SiO 2和5-3重量％的硅酸钠组成。 此外，公开了使用该组合物提供连续的中子和γ射线屏蔽结构的方法。

    Neutron-protection heat insulating material
    10.
    发明授权
    Neutron-protection heat insulating material 失效
    中子保护隔热材料

    公开(公告)号：US4303553A

    公开(公告)日：1981-12-01

    申请号：US946570

    申请日：1978-09-28

    申请人： Susumu Aoki ,  Hirosi Asaumi ,  Shigeo Take ,  Junichi Miyakoshi ,  Hiroshi Takemoto ,  Kenta Kabayama

    发明人： Susumu Aoki ,  Hirosi Asaumi ,  Shigeo Take ,  Junichi Miyakoshi ,  Hiroshi Takemoto ,  Kenta Kabayama

    IPC分类号： C04B14/40 ,  C04B30/02 ,  G21C11/08 ,  G21F1/06 ,  G21C11/06

    CPC分类号： C04B30/02 ,  C04B14/40 ,  G21C11/081 ,  G21F1/06 ,  Y02E30/40 ,  Y10S376/904 ,  Y10S428/911 ,  Y10S428/92 ,  Y10T428/31652

    摘要： A neutron protection thermal insulating material is obtained by adding a boron compound and, if necessary, a hydrous compound, to chrysotile asbestos fibers. To form the material, the asbestos is opened with the use of a surface active agent in the presence of water. The boron compound is added and air bubbles are incorporated into the mixture which is then dried, molded and compressed. The resulting product is characterized by a construction wherein the opened asbestos fibers are oriented in substantially parallel relation to each other and in the direction perpendicular to the compression direction and air pockets are flatly arranged between the fibers and substantially parallel thereto to reduce thermal conduction through the material in the direction parallel to the direction of compression.

    摘要翻译： 通过向温石棉纤维中加入硼化合物和必要时加入含水化合物得到中子保护绝热材料。 为了形成材料，使用表面活性剂在水存在下打开石棉。 加入硼化合物，将气泡并入混合物中，然后干燥，模制和压缩。 所得产品的特征在于其中开放的石棉纤维被定向成基本上彼此平行并且在垂直于压缩方向的方向上定向，并且空气袋平坦地布置在纤维之间并且基本上与其平行，以减少热传导 材料在平行于压缩方向的方向上。