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13 条记录 (耗时 0.01 秒)

    Mixing grid
    1.
    发明公开
    Mixing grid 失效
    混合网

    公开(公告)号：EP0237064A3

    公开(公告)日：1987-10-14

    申请号：EP87103564

    申请日：1987-03-12

    申请人： Siemens Aktiengesellschaft

    发明人： Patterson, John F. ,  Von Olnhausen, Wayne A. ,  Yates, Jack

    IPC分类号： G21C03/32 ,  G21C03/34

    CPC分类号： G21C3/3563 ,  G21C3/322 ,  G21Y2002/201 ,  G21Y2004/30 ,  Y02E30/31 ,  Y02E30/32 ,  Y02E30/38

    摘要： A grid for use in nuclear fuel assemblies is made up of double grid members which are deformed so as to provide channels for the coolant. At least the upper portions (12) of these channels are inclined relative to the axes of the fuel rods and are disposed in such a manner as to cause circulation of fluid about each individual rod and within the assembly. In one embodiment the grid is positioned between the positioning grids and serves primarily as a coolant deflector. In another embodiment so constructed as to serve the positioning grid, as well as a flow deflector, the channels are straight in their lower portions i.e. parallel to the axes of the fuel rods. In their upper portions they curve to provide the desired deflection of the cooling fluid and the straight section hence they have a slight bow outward, relative to the plane of the grid member of which they are a part. This outwardly bowed portion engages the fuel rod and acts as a positioning spring. The grid members are cut away ajacent the straight sections to give the necessary flexibility. This design is particularly useful in pressurized water reactors. In grids intended for use in boiling water reactors, where the lateral loading is less severe, the straight portion can be omitted. The two plates may be welded together at their intersections, at their uppper edges only, while the lower edges are left free. In this case, the flexing of the grid memebers themselves serves to provide the spring forces necessary to position the fuel rods. In order to give improved flexibility, and proper fit with the rods when loaded, the surfaces of the channels which contact the fuel rods are given a twisted or helical formation.

    BWR critical-power-enhancing water rod
    5.
    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）。

    Fuel assembly debris screen
    6.
    发明公开
    Fuel assembly debris screen 失效
    Kernbrennstabbündeltrümmerfilter。

    公开(公告)号：EP0455010A1

    公开(公告)日：1991-11-06

    申请号：EP91105681.0

    申请日：1991-04-10

    申请人： SIEMENS AKTIENGESELLSCHAFT

    发明人： Patterson, John F. ,  Yates, Jack ,  Ewing, Richard H.

    IPC分类号： G21C19/307 ,  G21C3/32

    CPC分类号： G21C3/3206 ,  Y02E30/40

    摘要： A debris screen (14) for a fuel assembly for a reactor to which coolant fluid is supplied comprises a substantially planar plate member (22) having an array of coolant openings (25) extending through the plate member dimensioned to trap at least a portion of debris particles carried by the coolant; and a skirt member (16) enclosing the periphery of the plate member (22); each of the coolant flow openings (25) having a coolant entry region (19) at a lower surface, a coolant exit region (20) at an upper surface and a coolant flow path extending between the entry and exit regions, the flow path including an intermediate segment (22c) laterally offset from the entry and exit regions to cause coolant to change direction of flow in the intermediate segment and thereby prevent at least a portion of the debris particles from passing through the plate members.

    摘要翻译： 用于供应冷却剂流体的反应器的燃料组件的碎屑筛（14）包括基本平坦的板构件（22），其具有延伸穿过板构件的冷却剂开口（25）阵列，其尺寸被设计成将至少一部分 由冷却剂携带的碎屑颗粒; 以及围绕所述板构件（22）的周边的裙部构件（16）; 每个冷却剂流动开口（25）在下表面具有冷却剂入口区域（19），上表面处的冷却剂出口区域（20）和在入口区域和出口区域之间延伸的冷却剂流动路径，所述流动路径包括 一个从入口和出口区域横向偏移的中间段（22c），以使冷却剂改变中间段中的流动方向，从而防止至少一部分碎屑颗粒通过板件。

    Grid spacer and method of making same
    10.
    发明公开
    Grid spacer and method of making same 失效
    网格间隔器及其制作方法

    公开(公告)号：EP0273183A3

    公开(公告)日：1988-07-20

    申请号：EP87117113

    申请日：1987-11-19

    申请人： Siemens Aktiengesellschaft

    发明人： King, Peter ,  Patterson, John F. ,  Yates, Jack ,  Brown, Charles

    IPC分类号： G21C03/34

    CPC分类号： G21C3/356 ,  G21Y2002/201 ,  G21Y2004/302 ,  Y02E30/40 ,  Y10T29/531

    摘要： A marked reduction in the pressure drop of cooling liquid through a grid spacer of a nuclear fuel assembly is attained by convexly contouring the up­stream (usually the lower) edges (32) of the grid members. Preferably, they are made streamlined or semicylind­rical. This can be done by first beveling and then etching them, by directing a stream of mixture of abrasive and an organic polymer against them, or by traversing an electron or laser beam along them at a power and velocity such as to cause local melting. A lesser improvement is secured by beveling along. A still further improvement can be obtained by also tape­ring the downstream (usually upper) edges (34).