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    FUEL ELEMENT ASSEMBLY FOR A NUCLEAR REACTOR AND A NUCLEAR REACTOR
    72.
    发明公开
    FUEL ELEMENT ASSEMBLY FOR A NUCLEAR REACTOR AND A NUCLEAR REACTOR 失效
    BRENNSTABBÜNDELFÜRKERNREAKTOR UND KERNREAKTOR

    公开(公告)号：EP0831497A4

    公开(公告)日：1999-03-31

    申请号：EP97917493

    申请日：1997-03-26

    申请人： GORBATYKH VALERY PAVLOVICH ,  BAIBAKOV VLADISLAV DMITRIEVICH ,  MANSUR SHARIFLU NASER ,  FEDICHKIN NIKITA VALENTINOVICH

    发明人： GORBATYKH VALERY PAVLOVICH ,  BAIBAKOV VLADISLAV DMITRIEVICH ,  MANSUR SHARIFLU NASER ,  FEDICHKIN NIKITA VALENTINOVICH

    IPC分类号： G21C5/18 ,  G21C3/326 ,  G21C3/328 ,  G21C1/00 ,  G21C3/00

    CPC分类号： G21C3/326 ,  G21Y2002/201 ,  G21Y2002/304 ,  G21Y2004/30 ,  Y02E30/38

    摘要： A fuel element assembly has a non-symmetrical (in plan) distribution of fuel material and is composed of nuclides of differing concentrations in the nuclear fuel of the fuel elements which are disposed in such a way as to form two subsidiary zones about the plane through the central longitudinal axis of the assembly containing different nuclide concentrations (averaged by volume of nuclear fuel). The active zone of the nuclear reactor contains at least some of these "non-symmetrical" assemblies in which the subsidiary zones whose nuclear fuel contains a lower concentration of fissile nuclides are aligned along the central longitudinal axis of the active zone, whilst the fuel elements of the peripheral series adjoining the side reflector can have an orientation opposite to that of the subsidiary zone with the lower concentration of fissile nuclides. In addition, at least some of the differing types of fuel elements forming the "non-symmetrical" fuel elements can be made with a nuclear fuel containing a depleted absorber.

    摘要翻译： 放热组件在计划燃料材料分布中具有不对称性，并且从多形式组装到核燃料元件中的核素浓度，其被布置成使得它们形成具有不同的核燃料体积平均核素浓度相对于平面的两个分数 通过组件的中心纵向轴线，核反应堆在核心中容纳至少一些上述“不对称”组件，其由核心定向，核燃料中的可裂变核素的集中度在 芯的中心纵向轴线和与侧面反射器邻接的周边排的散热组件可以具有与副核心的方向相反的取向，而来自中心纵向轴线的可裂变核素的浓度较小。 除了形成“非对称”散热组件的至少一些多典型散热元件可以用含有消耗吸收剂的核燃料制成。

    Fuel assembly for a pressurized water reactor
    74.
    发明公开
    Fuel assembly for a pressurized water reactor 失效
    Brennelementbündelfüreinen Druckwasserreaktor。

    公开(公告)号：EP0347674A1

    公开(公告)日：1989-12-27

    申请号：EP89110514.0

    申请日：1989-06-10

    申请人： ABB ATOM AB

    发明人： Nylund, Olov

    IPC分类号： G21C3/00 ,  G21C15/02

    CPC分类号： G21C3/322 ,  G21Y2002/201 ,  G21Y2004/30 ,  G21Y2004/302 ,  Y02E30/32 ,  Y02E30/38

    摘要： In a fuel assembly for a nuclear reactor, spacers are used for keeping together and fixing fuel rods (7) and control rod guide tubes (8), if any, in the fuel assembly. To be able to improve the cooling of the fuel rods in the fuel as­sembly during operation, sub-spacers (5,6) are arranged for controlling the cooling water flow in the fuel assembly. With sub-spacers formed as inner sub-spacers (5) and outer sub-spacers (6), which are placed alternately along the fuel assembly (1), it is possible to create a cross flow which alternately acts between the inner and outer regions in the fuel assembly, whereby the cooling water is mixed with an essentially maintained low pressure drop. The cross flow also provides short distances between the turbulence regions which arise after each spacer, which is expected to lead to a high DNB margin and a low pressure drop.

    摘要翻译： 在用于核反应堆的燃料组件中，间隔件用于将燃料棒（7）和控制杆导管（8）（如果有的话）固定在一起并固定在燃料组件中。 为了能够在操作期间改善燃料组件中的燃料棒的冷却，子间隔件（5,6）被布置成用于控制燃料组件中的冷却水流。 通过沿着燃料组件（1）交替放置的作为内部子间隔件（5）和外部子间隔件（6）形成的子间隔件，可以产生交替地在内部和外部 燃料组件中的区域，由此冷却水与基本保持的低压降混合。 横流还提供在每个间隔物之后出现的湍流区域之间的短距离，预期其将导致高DNB余量和低压降。

    BWR critical-power-enhancing water rod
    76.
    发明公开
    BWR critical-power-enhancing water rod 失效
    “水棒”fürSiedewasserreaktoren。

    公开(公告)号：EP0240894A2

    公开(公告)日：1987-10-14

    申请号：EP87104688.4

    申请日：1987-03-30

    申请人： SIEMENS AKTIENGESELLSCHAFT

    发明人： Patterson, John F. ,  MacDuff, Robert B. ,  Yates, Jack

    IPC分类号： G21C3/00 ,  G21C15/08

    CPC分类号： G21C3/328 ,  G21C3/322 ,  G21C2003/3225 ,  G21Y2002/201 ,  G21Y2004/30 ,  Y02E30/31 ,  Y02E30/38

    摘要： A full assembly for a boiling water reactor in which water rods (18) for providing moderating effects and enhanced cooling effects comprise an outer tube having inlet openings (22) dis­posed near its lower extremity, intermediate exit openings (24) somewhat above the midpoint of the rods (18) and an inner tube (28) open at its top and bottom, disposed within the upper portion of rod (18) in a critical heat transfer zone (32) and having water outlet openings near the midpoint of heat transfer zone (32).

    摘要翻译： 用于沸水反应器的完整组件，其中用于提供调节效果和增强的冷却效果的水杆（18）包括外管，其具有设置在其下端附近的入口开口（22），中间出口（24）稍微高于 杆（18）和内管（28）在其顶部和底部开口，在临界传热区（32）内设置在杆（18）的上部内，并且在传热区的中点附近具有出水口 （32）。

    NUCLEAR FUEL PARTICLES.
    79.
    发明公开
    NUCLEAR FUEL PARTICLES. 失效
    核燃料粒子。

    公开(公告)号：EP0015990A1

    公开(公告)日：1980-10-01

    申请号：EP79900515

    申请日：1979-12-04

    申请人： GEN ATOMIC CO

    发明人： KAAE JAMES L ,  REYNOLDS GEORGE H ,  STERLING STEWART A ,  YANG LING

    IPC分类号： G21C3/00 ,  B29C65/36 ,  G21C3/62 ,  G21C3/64 ,  G21C3/06 ,  C23C11/00

    CPC分类号： G21C3/626 ,  Y02E30/38

    摘要： Des particules de combustible nucleaire revetue sont produites par un premier depot pyrolitique de carbone de faible densite sur des noyaux combustibles, puis par un revetement externe de plus grande densite a retention de produits de fission. Dans l'amelioration, des noyaux d'oxydes d'uranium, de thorium ou de plutonium sont revetus d'un depot associe de carbure de silicium ou de carbure de zirconium et de pyrocarbone de faible densite pour obtenir une dispersion uniforme. Le silicium ou le zirconium est depose en quantite egale a au moins un atome pour chaque fission attendue pendant la vie du combustible.