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    Fuel assembly
    1.
    发明授权
    Fuel assembly 失效
    燃油组件

    公开(公告)号：US5528641A

    公开(公告)日：1996-06-18

    申请号：US357261

    申请日：1994-12-13

    申请人： Kenichi Takeuchi ,  Koji Nishida ,  Yasunori Bessho ,  Yukihisa Fukasawa ,  Junjiro Nakajima

    发明人： Kenichi Takeuchi ,  Koji Nishida ,  Yasunori Bessho ,  Yukihisa Fukasawa ,  Junjiro Nakajima

    IPC分类号： G21C3/326 ,  G21C3/322 ,  G21C7/27 ,  G21C3/32

    CPC分类号： G21C3/322 ,  G21Y2002/201 ,  G21Y2002/304 ,  G21Y2004/30 ,  G21Y2004/302 ,  G21Y2004/403 ,  Y02E30/38

    摘要： A fuel assembly is provided with a coolant ascending path for making coolant rise and a water rod having a coolant descending path for conducting the coolant.A ratio of a flow area in a coolant inlet port of the smallest in coolant ascending path 13 on the downstream side than large diameter tube portion 3E to a flow area of the largest in the axial direction of coolant ascending path 13 in large diameter tube portion 3E is set to be 0.2-20%.In the normal operation, the declination degree from the liquid level in the coolant ascending path, corresponding to the coolant flow rate of the liquid level formed in the coolant ascending path can be controlled. Further, at the time of the excess the change speed of the liquid level can also be controlled.

    摘要翻译： 燃料组件设置有用于使冷却剂升起的冷却剂上升路径和具有用于导引冷却剂的冷却剂下降路径的水杆。 在大直径管部3E的下游侧的冷却剂上升路径13中的最小的冷却剂入口的流入面积与大径管部中的冷却剂上升路径13的轴向上最大的流动面积的比 3E设定为0.2〜20％。 在正常操作中，可以控制与冷却剂上升路径中形成的液面的冷却剂流量相对应的冷却剂上升路径中的液位的偏角度。 此外，在过量时，也可以控制液面的变化速度。

    Fuel assembly
    3.
    发明授权
    Fuel assembly 失效
    燃油组件

    公开(公告)号：US5490192A

    公开(公告)日：1996-02-06

    申请号：US247854

    申请日：1994-05-23

    申请人： Junjiro Nakajima ,  Koji Nishida ,  Satoshi Kanno ,  Tadashi Mizuno ,  Yasunori Bessho ,  Masahisa Inagaki ,  Yasuhiro Aizawa

    发明人： Junjiro Nakajima ,  Koji Nishida ,  Satoshi Kanno ,  Tadashi Mizuno ,  Yasunori Bessho ,  Masahisa Inagaki ,  Yasuhiro Aizawa

    IPC分类号： G21C3/344 ,  G21C3/34

    CPC分类号： G21C3/344 ,  G21Y2002/101 ,  G21Y2004/302 ,  Y02E30/40

    摘要： A fuel assembly comprises a plurality of fuel rods, tie plates for holding both ends of these fuel rods, and spacers which support these fuel rods. The spacer comprises a plurality of cells into which the fuel rods are inserted respectively, the adjacent cells being joined to each other at axial ends thereof, whereby a space between these cells being held or retained, and a plurality of loop springs held respectively on the cells. Each of the loop springs has a pair of resilient members which are located within the pair of adjacent cells and which urge the fuel rods in a radial direction, and a pair of connections which connect axial ends of the resilient members to each other. Each of the connections have a passage through which coolant flows axially and which is defined by a closed peripheral wall. The closed peripheral wall is not uniform in thickness. The pair of adjacent cells have at axial end portions of peripheral walls openings for accommodating or receiving the connections of the loop spring.

    摘要翻译： 燃料组件包括多个燃料棒，用于保持这些燃料棒的两端的连接板以及支撑这些燃料棒的间隔件。 间隔件包括分别插入燃料棒的多个单元，相邻的单元在其轴向端部彼此接合，由此保持或保持这些单元之间的空间，以及分别保持在该单元上的多个环形弹簧 细胞。 每个环形弹簧具有一对弹性构件，该弹性构件位于一对相邻的单元内并且沿径向推动燃料棒，以及将弹性构件的轴向端部彼此连接的一对连接件。 每个连接件都有一个通道，冷却剂通过该通道轴向流动，并由封闭的外围壁限定。 封闭的周边壁厚度不均匀。 一对相邻的单元具有用于容纳或接收环形弹簧的连接的外围壁开口的轴向端部。

    Fuel assembly and nuclear reactor
    4.
    发明授权
    Fuel assembly and nuclear reactor 失效
    燃料装配和核反应堆

    公开(公告)号：US5617456A

    公开(公告)日：1997-04-01

    申请号：US463828

    申请日：1995-06-05

    申请人： Hideki Kurosaki ,  Junjiro Nakajima ,  Hajime Umehara ,  Shozo Nakamura ,  Satoshi Kanno ,  Koji Nishida ,  Yasunori Bessho ,  Masahisa Inagaki ,  Osamu Yokomizo ,  Yuichiro Yoshimoto

    发明人： Hideki Kurosaki ,  Junjiro Nakajima ,  Hajime Umehara ,  Shozo Nakamura ,  Satoshi Kanno ,  Koji Nishida ,  Yasunori Bessho ,  Masahisa Inagaki ,  Osamu Yokomizo ,  Yuichiro Yoshimoto

    IPC分类号： G21C3/328 ,  G21C21/00

    CPC分类号： G21C3/328 ,  Y02E30/38

    摘要： The lower end of each of a plurality of fuel rods is supported by a fuel supporting portion of a lower tie plate. The fuel supporting portion includes a plurality of second coolant paths for supplying a coolant from below the fuel supporting portion to a first coolant path defined above the fuel supporting portion and between the fuel rods. The total cross-sectional area of all the second coolant paths is smaller than the cross-sectional area of the first coolant path. A water rod disposed between the fuel rods each includes an ascending tube path having therein a coolant ascending path having a coolant inlet port opening to a region below the fuel supporting portion, for guiding upward the coolant supplied through the coolant inlet port, and a descending tube having therein a coolant descending path having a coolant delivery port opening to said first coolant path, for guiding downward the coolant guided by said coolant ascending path and discharging the coolant through the coolant delivery port to the first coolant path. The descending tube path is so disposed outside the ascending tube path as to define a gap, through which the coolant inside the first coolant path flows, between it and the ascending tube path.

    摘要翻译： 多个燃料棒的每一个的下端由下连接板的燃料支撑部支撑。 燃料支撑部分包括多个第二冷却剂路径，用于将冷却剂从燃料支撑部分下方供应到限定在燃料支撑部分上方和燃料棒之间的第一冷却剂路径。 所有第二冷却剂通道的总截面积小于第一冷却剂通道的横截面面积。 设置在燃料棒之间的水杆各自包括上升管路，其中具有冷却剂上升路径，其具有通向燃料支撑部分下方的区域的冷却剂入口，用于向上引导通过冷却剂入口提供的冷却剂， 其中具有冷却剂下降路径，其具有通向所述第一冷却剂路径的冷却剂输送口，用于向下引导由所述冷却剂上升路径引导的冷却剂并将冷却剂通过冷却剂输送端口排出到第一冷却剂路径。 下降的管道设置在上升管道的外侧，以便限定第一冷却剂路径内的冷却剂在其与上升的管道之间流动的间隙。

    Fuel assembly and boiling water reactor
    6.
    发明授权
    Fuel assembly and boiling water reactor 失效
    燃油组件和锅炉水反应堆

    公开(公告)号：US5167911A

    公开(公告)日：1992-12-01

    申请号：US669376

    申请日：1991-03-14

    申请人： Koji Fujimura ,  Yasunori Bessho ,  Yoshihiko Ishii ,  Sadao Uchikawa ,  Yuichiro Yoshimoto ,  Junjiro Nakajima

    发明人： Koji Fujimura ,  Yasunori Bessho ,  Yoshihiko Ishii ,  Sadao Uchikawa ,  Yuichiro Yoshimoto ,  Junjiro Nakajima

    IPC分类号： G21C3/33 ,  G21C3/322 ,  G21C7/27 ,  G21C15/02

    CPC分类号： G21C15/02 ,  G21C3/322 ,  Y02E30/31 ,  Y02E30/38

    摘要： A fuel assembly comprises a plurality of fuel rods which contain nuclear fuel material inside, a lower tie plate which holds the lower end of the fuel rods and has a path inside to lead coolant between the fuel rods, and a channel box which encloses a bundle of the fuel rods. An orifice, in which a plurality of round rods are arranged to cross the coolant flow path, is installed in a through hole at a side wall of the lower tie plate by connecting to the side wall. Orifice coefficient of the orifice becomes large at small flow rate of coolant which supplied to the fuel assembly, and becomes small at large flow rate of coolant. By using the fuel assembly described above, void fraction in a gap region between fuel assemblies can be altered during beginning and end of an operation cycle of the nuclear reactor.

    摘要翻译： 燃料组件包括在其内部容纳核燃料材料的多个燃料棒，保持燃料棒的下端的下连接板，并且具有内部的路径，以在燃料棒之间引导冷却剂，以及包围束的通道箱 的燃料棒。 其中多个圆棒布置成穿过冷却剂流动路径的孔口通过连接到侧壁而安装在下连接板的侧壁的通孔中。 在供给到燃料组件的冷却剂的小流量下，孔口的孔数变大，在冷却剂的大流量下变小。 通过使用上述燃料组件，可以在核反应堆的操作循环的开始和结束期间改变燃料组件之间的间隙区域中的空隙率。

    Fuel assembly and reactor core
    8.
    发明授权
    Fuel assembly and reactor core 失效
    燃料组件和反应堆堆芯

    公开(公告)号：US5383229A

    公开(公告)日：1995-01-17

    申请号：US879

    申请日：1993-01-05

    申请人： Akinobu Nakajima ,  Yoko Ishibashi ,  Motoo Aoyama ,  Kunitoshi Kurihara ,  Junichi Yamashita ,  Junjiro Nakajima ,  Koji Nishida

    发明人： Akinobu Nakajima ,  Yoko Ishibashi ,  Motoo Aoyama ,  Kunitoshi Kurihara ,  Junichi Yamashita ,  Junjiro Nakajima ,  Koji Nishida

    IPC分类号： G21C3/328 ,  G21C3/32

    CPC分类号： G21C3/328 ,  G21Y2002/201 ,  G21Y2004/30 ,  Y02E30/38

    摘要： A second fuel rod positioned at each corner of a channel box and second fuel rods adjacent to the former are formed to have a smaller outer diameter than that of ordinary first fuel rods, so that a pitch between the second fuel rods is narrower than a pitch between the first fuel rods. Making the outer diameter of the second fuel rods smaller than that of the first fuel rods reduces the power per unit length of the second fuel rods. The narrower pitch between the second fuel rods than the pitch between the first fuel rods provides two effects. First, a unit lattice cell becomes so small as to avoid an increase in the H/U ratio. Secondly, a new moderator region is formed between the second fuel rods and the first fuel rods adjacent thereto, the moderator region acting to intensify thermal neutron flux around those first fuel rods. These two effects enable a further reduction in the power per unit length of the second fuel rods. As a result, a fuel assembly intended for higher burn-up can be realized by increasing enrichment, while suppressing an increase in the local power peaking factor at corners of the fuel assembly.

    摘要翻译： 定位在通道箱的每个角落处的第二燃料棒和与前者相邻的第二燃料棒形成为具有比普通的第一燃料棒小的外径，使得第二燃料棒之间的间距比间距窄 在第一燃料棒之间。 使得第二燃料棒的外径小于第一燃料棒的外径减小了第二燃料棒的每单位长度的功率。 第二燃料棒之间的间距窄于第一燃料棒之间的间距，提供了两个效果。 首先，单位晶胞变得如此小以避免H / U比的增加。 其次，在第二燃料棒和与其相邻的第一燃料棒之间形成新的慢化剂区域，该慢化剂区域用于加强围绕这些第一燃料棒的热中子通量。 这两个效果使得能够进一步降低第二燃料棒的每单位长度的功率。 结果，可以通过增加浓缩来实现用于更高燃耗的燃料组件，同时抑制燃料组件的角落处的局部功率峰值因数的增加。

    Zirconium based alloy of low irradiation growth, method of producing the same, and use of the same
    9.
    发明授权
    Zirconium based alloy of low irradiation growth, method of producing the same, and use of the same 失效
    低辐照生长的锆基合金及其制造方法及其用途

    公开(公告)号：US5862194A

    公开(公告)日：1999-01-19

    申请号：US814337

    申请日：1997-03-11

    申请人： Tadashi Fujieda ,  Masahisa Inagaki ,  Iwao Takase ,  Junjiro Nakajima ,  Rinichi Asano ,  Takehiro Seto

    发明人： Tadashi Fujieda ,  Masahisa Inagaki ,  Iwao Takase ,  Junjiro Nakajima ,  Rinichi Asano ,  Takehiro Seto

    IPC分类号： C22C16/00 ,  C22F1/18 ,  G21C3/07 ,  G21C3/324 ,  C22F1/16

    CPC分类号： C22C16/00 ,  C22F1/186 ,  G21C3/07 ,  G21Y2004/10 ,  Y02E30/40

    摘要： The present invention provides a zirconium based alloy member which has very small deformation of elongation and bow occurring due to irradiation growth, a method of manufacturing it, and particularly an channel box for an atomic reactor fuel assembly. A zirconium based alloy plate member having a width of not less than 100 mm and a long length, containing not more than 5 wt % Nb and/or not more 5 wt % Sn, the member having (0001) orientation (Fl value) of hexagonal Zr with respect to longitudinal direction ranging from 0.20 to 0.35, the difference in Fl between the middle and the end being not more than the value calculated from (0.0935.times.Fl-0.00585) and an amount of bow at neutron irradiation of 35 GWd/t which bow occurs in the channel box for a reactor being not more than 2.16 mm.

    摘要翻译： 本发明提供一种锆基合金构件，其由于照射生长而具有非常小的伸长变形和弓形，其制造方法，特别是用于原子反应堆燃料组件的通道箱。 一种宽度不小于100mm，长度不大于5重量％的Nb和/或不多于5重量％Sn的锆基合金板构件，具有（0001）取向（F1值）为 相对于纵向为0.20〜0.35的六方晶相，中间和末端之间的F1的差不大于由（0.0935xFl-0.00585）计算的值，中子照射下的弓的量为35GWd / t 在弯道出现弯道不大于2.16mm的反应堆。