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    Equipment for producing nuclear fuel powder
    1.
    发明授权
    Equipment for producing nuclear fuel powder 有权

    公开(公告)号：US11817224B2

    公开(公告)日：2023-11-14

    申请号：US17282935

    申请日：2018-10-09

    申请人： FRAMATOME

    发明人： Serge Perrin ,  Pascal Rouquette

    IPC分类号： G21C21/00 ,  C01G43/025 ,  B01J12/02 ,  B01J19/00 ,  C01B13/22

    CPC分类号： G21C21/00 ,  B01J12/02 ,  B01J19/00 ,  C01B13/22 ,  C01G43/025

    摘要： A nuclear fuel powder production plant comprises a conversion installation (2) for the conversion of uranium hexafluoride (UF6) into uranium dioxide (UO2) having a hydrolysis reactor (4) for the conversion of UF6 into uranium oxyfluoride powder (UO2F2) and a pyrohydrolysis furnace (6) for converting the UO2F2 powder into UO2 powder. The nuclear fuel powder production plant also includes a packaging unit (20) for the UO2 powder comprising a filling station (22) having a chamber (26) for receiving a container (24) to be filled, a filling duct (28) supplied from the furnace (6) and a suction system (32) comprising a suction ring (34) disposed at the outlet (30) of the filling duct (28) for sucking an annular air flow (A) around a stream (P) of UO2 powder falling from the outlet (30) from the filling duct (28) into the container (24).

    METHOD AND FACILITY FOR CONVERTING URANIUM HEXAFLUORIDE INTO URANIUM DIOXIDE
    3.
    发明申请
    METHOD AND FACILITY FOR CONVERTING URANIUM HEXAFLUORIDE INTO URANIUM DIOXIDE 有权

    公开(公告)号：US20210347653A1

    公开(公告)日：2021-11-11

    申请号：US17283003

    申请日：2018-10-09

    申请人： FRAMATOME

    发明人： Bruno MESONA ,  André FEUGIER ,  Alain YAKOUBI

    IPC分类号： C01G43/025 ,  G21C3/62

    摘要： A conversion process for converting uranium hexafluoride into uranium dioxide includes the steps of hydrolysis of UF6 to uranium oxyfluoride (UO2F2) in a hydrolysis reactor (4) by reaction between gaseous UF6 and dry water vapour injected into the reactor (4), pyrohydrolysis of UO2F2 to UO2 in a pyrohydrolysis furnace (6) by reacting UO2F2 with dry steam and gaseous hydrogen (H2) injected into the furnace (6), extracting excess gas in the reactor (4) via a collecting device (50) comprising several filters (52), periodically cleaning the filters (52) by injecting a neutral gas into the filters (52) from the outside to the inside of the reactor (4) to remove powder stuck on the filters (52), and measuring the relative pressure in the reactor (4). The conversion method further includes carrying out point cleaning of the filters (52) when the relative pressure in the reactor (4) exceeds a predetermined point cleaning threshold.

    Fuel pellet
    4.
    发明申请
    Fuel pellet 有权

    公开(公告)号：US20210272709A1

    公开(公告)日：2021-09-02

    申请号：US17253288

    申请日：2019-06-10

    申请人： WESTINGHOUSE ELECTRIC SWEDEN AB

    发明人： Simon Charles Middleburgh ,  Mattias Puide ,  Lars Hallstadius ,  Magnus Limbäck ,  Paul Blair

    IPC分类号： G21C3/04 ,  C01G43/025 ,  G21C3/326 ,  G21C21/02

    摘要： A uranium oxide fuel pellet having an inner region and an outer rim region about the inner region, and that the fuel pellet is cylindrical and the inner region and outer rim region are coaxial cylindrical regions. The outer rim region has an excess of oxygen in comparison to the inner region , wherein high burnup structure (HBS) formation will be suppressed or delayed. Preferably, the excess oxygen is obtained by a chemical treatment by immersing the pellet in hydrogen peroxide (H2O2) or potassium permanganate (KMnO4) in solution.

    NON-EQUILIBRIUM POLARONIC QUANTUM PHASE-CONDENSATE BASED ELECTRICAL DEVICES
    5.
    发明申请
    NON-EQUILIBRIUM POLARONIC QUANTUM PHASE-CONDENSATE BASED ELECTRICAL DEVICES 审中-公开

    公开(公告)号：US20190389739A1

    公开(公告)日：2019-12-26

    申请号：US16341847

    申请日：2017-10-16

    申请人： NEQCST CORPORATION

    发明人： Steven Conradson

    IPC分类号： C01G43/025 ,  H01L29/66 ,  H01L29/45 ,  H01L29/49 ,  H01L45/00 ,  H01L39/14 ,  H01G9/16 ,  H01P3/08 ,  H01L43/02 ,  H01L43/10 ,  H01G9/042 ,  H01S5/042 ,  H01S5/30

    摘要： Electrical devices operating in a range of −273° C. to 100° C. are disclosed. The devices include an insulating substrate. A U02+x crystal or oriented crystal U02+x film is on a first portion of the substrate. The U02+x crystal or film originates and hosts a non-equilibrium polaronic quantum phase-condensate. A first lead on a second portion of the substrate is in electrical contact with the U02+x crystal or film. A second lead on a third portion of the surface is in electrical contact with the U02+x crystal or film. The leads are isolated from each other. A U02+x excitation source is in operable communication with the UO2+x crystal or film. The source is configured to polarize a region of the crystal or film thereby activating the non-equilibrium quantum phase-condensate. One source state causes the UO2+x crystal or film to be conducting. Another source state causes the U02+x crystal or film to be non-conductive.

    Multicomponent fluid feed apparatus with preheater and mixer for a high temperature chemical reactor
    9.
    发明授权
    Multicomponent fluid feed apparatus with preheater and mixer for a high temperature chemical reactor 失效
    具有高温化学反应器预热器和混合器的多组分流体输送装置

    公开(公告)号：US5935528A

    公开(公告)日：1999-08-10

    申请号：US783512

    申请日：1997-01-14

    申请人： Michael J. Stephenson ,  Paul A. Haas ,  David A. Everitt

    发明人： Michael J. Stephenson ,  Paul A. Haas ,  David A. Everitt

    IPC分类号： B01J8/24 ,  B01J12/02 ,  B01J19/26 ,  C01G43/01 ,  C01G43/025 ,  C01G43/02

    CPC分类号： B01J12/02 ,  B01J19/26 ,  B01J8/1827 ,  C01G43/01 ,  C01G43/025 ,  B01J2219/00099 ,  B01J2219/00119 ,  B01J2219/00135 ,  B01J2219/00159

    摘要： A multicomponent fluid feed apparatus is disclosed that independently preheats and then mixes two or more fluid streams being introduced into a high temperature chemical reactor to promote more rigorous and complete reactions using assemblies of inert tubular elements and an integral mixing orifice plate. The design allows use of ceramic and speciality alloy materials for high temperature service with particularly corrosive halide feeds such as UF.sub.6 and HF. Radiant heat transfer to the tubular elements from external means gives the necessary system high temperatures without excessive temperatures to cause material failure. Preheating of the gaseous reactants in a separate step prior to mixing and injecting the gaseous reactants into a high temperature chemical reactor was found to provide an improved thermal conversion of UF.sub.6 to uranium oxides.

    摘要翻译： 公开了一种多组分流体输送装置，其独立地预热然后将引入到高温化学反应器中的两种或更多种流体流混合，以使用惰性管状元件和整体混合孔板的组件来促进更严格和完整的反应。 该设计允许使用陶瓷和特种合金材料进行高温维护，特别是腐蚀性卤化物进料如UF6和HF。 从外部装置向管状元件的辐射热传递给出必要的系统高温，而没有过多的温度导致材料失效。 发现在气态反应物混合并将气态反应物注入高温化学反应器之前，在单独的步骤中预热气态反应物以提供UF 6与氧化铀的改进的热转化。