中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

39 records (took 0.019 seconds)

    Coating surfaces, such as interiors of steam generator tubes
    21.
    发明专利
    Coating surfaces, such as interiors of steam generator tubes 未知

    公开(公告)号：FR2748038A1

    公开(公告)日：1997-10-31

    申请号：FR9605169

    申请日：1996-04-24

    Applicant: FRAMATOME SA

    Inventor： CARTRY JEAN PIERRE ,  MICHAUT BERNARD ,  HERTZ DOMINIQUE

    IPC: C23C18/36 ,  C23C18/32 ,  F22B37/10 ,  G21C17/017

    Abstract: A metal wall is heated to over 90, preferably 120-180 deg. C while in contact with an aqueous solution at above atmospheric pressure to induce a chemical reaction which coats the wall with nickel. Also claimed is coating the interiors of the tubes (5) of a steam generator associated with a pressurised water-cooled nuclear reactor by a chemical reaction, wherein an aqueous solution is circulated through the tubes, which are heated by circulating a hot liquid (21), preferably water at elevated pressure, around the outsides of the tubes in the secondary coolant space.

    22.
    发明专利
    未知

    公开(公告)号：FR2728097A1

    公开(公告)日：1996-06-14

    申请号：FR9414987

    申请日：1994-12-13

    Applicant: FRAMATOME SA

    Inventor： HERTZ DOMINIQUE ,  PILLET LUC

    IPC: G21C7/103 ,  G21C7/24 ,  G21C7/117 ,  G21C21/18

    Abstract: A control cluster for a water cooled and moderated nuclear reactor, comprises a spider and rods suspended from the spider. Each rod contains neutron-absorbing material. In a lower portion of each rod, the material is a metal neutron absorber. In an upper portion, it is a stack of pellets of boron carbide B4C. In a middle fraction occupying a height lying in the range 35% to 45% of the total height, it is zirconium diboride ZrB2 isotopically enriched in boron 10 or hafnium diboride HfB2.

    23.
    发明专利
    未知

    公开(公告)号：FR2727691A1

    公开(公告)日：1996-06-07

    申请号：FR9414466

    申请日：1994-12-01

    Applicant: FRAMATOME SA

    Inventor： HERTZ DOMINIQUE ,  BELMONTE THIERRY ,  GAVILLET JEROME ,  MICHEL HENRI

    IPC: G21C3/06 ,  C23C16/02 ,  C23C16/40 ,  C23C16/452 ,  G21C3/326 ,  G21C3/34 ,  C23C16/08 ,  G21C3/07

    Abstract: A superficial preoxydation of the substrate (2) is effected by placing it in contact with an oxidant gas excited by a cool plasma of the substrate (2) situated in the flow post-discharge of the cool plasma used to the oxidant element and heated to an oxidation temperature lower than 500 DEG C. At the surface of the preoxidized substrate (2), a metal oxide is provided by heterogenous oxidation of a metal halide by using a gas mixture comprising an oxidant element activated by a cool plasma. The oxidant gas mixture is set in contact with the halide at the closest vicinity of the substrate arranged in the remote flow post-discharge of the cool plasma. Preferably, the cool plasma is generated by micro-waves. The process may be used particularly for forming a protection coating on a casing tube of a nuclear fuel rod.

    Process for leakproof closure of a nuclear fuel element
    24.
    发明专利
    Process for leakproof closure of a nuclear fuel element 未知

    公开(公告)号：FR2625022A1

    公开(公告)日：1989-06-23

    申请号：FR8717756

    申请日：1987-12-18

    Applicant: FRAMATOME SA ,  COGEMA

    Inventor： HERTZ DOMINIQUE

    IPC: G21C3/10

    Abstract: Welding of the plug 4 onto the cladding 2 of the fuel rod 1 is performed in an enclosure filled with inert gas at the filling pressure of the fuel rod 1. The welding is performed using one of the following processes: arc welding with tungsten electrode, laser welding, microplasma welding.

    Nuclear fuel rod used in pressurized water reactor
    26.
    发明专利
    Nuclear fuel rod used in pressurized water reactor 未知

    公开(公告)号：FR2771211A1

    公开(公告)日：1999-05-21

    申请号：FR9714511

    申请日：1997-11-19

    Applicant: FRAMATOME SA

    Inventor： HAVARD PASCAL ,  HERTZ DOMINIQUE

    IPC: G21C3/16 ,  G21C3/17

    Abstract: The fuel rod (1) consists of a tubular sleeve (2) containing a series of fuel pellets (4) and sealed at each end by a plug (3). The sleeve, which is filled with a pressurized gas such as helium, also contains a capsule (5) with its inner chamber (6) filled with a gas at a lower pressure. The capsule has a self-destruct section such as a disc (8) which provides for an increase in volume for the expansion of the pressurized gas once its pressure rises above a set level.

Patent Agency Ranking