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13 条记录 (耗时 0.017 秒)

    Fuel assembly and boiling water reactor
    2.
    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 nuclear reactor
    3.
    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 fuel spacer
    4.
    发明授权
    Fuel assembly and fuel spacer 失效
    燃油组件和燃油间隔器

    公开(公告)号：US5112571A

    公开(公告)日：1992-05-12

    申请号：US510192

    申请日：1990-04-17

    申请人： Akihito Orii ,  Osamu Yokomizo ,  Yasuhiro Masuhara ,  Koji Nishida ,  Shigeto Murata ,  Shin-ichi Kashiwai ,  Kotaro Inoue ,  Yuichiro Yoshimoto

    发明人： Akihito Orii ,  Osamu Yokomizo ,  Yasuhiro Masuhara ,  Koji Nishida ,  Shigeto Murata ,  Shin-ichi Kashiwai ,  Kotaro Inoue ,  Yuichiro Yoshimoto

    IPC分类号： G21C3/322 ,  G21C3/344

    CPC分类号： G21C3/322 ,  G21C3/344 ,  Y02E30/38

    摘要： In a fuel assembly having fuel rods inserted into regularly arranged cells of a fuel spacer which keeps the fuel rods correctly spaced from one another and has spacer elements disposed in a plurality of stages in the longitudinal direction of the fuel rods, the fuel spacer comprises vanes formed on the cells in such a manner that each vane is bent from a cut formed in a part of the side wall of the cell. The vanes obliquely project into the corresponding spaces between adjacent fuel rods and allow a coolant flowing through the spaces and forming two-phase flows to generate swirling flows toward the fuel rods. The fuel spacer may alternatively comprise either thin-walled cylinders having built-in vanes or spiral vanes, which are fixed to the spacer that has not been subjected to any direct machining. Also disclosed is a fuel assembly provided with any of the above-described fuel spacers. The arrangement of the present invention enables, while assuring a sufficient strength for maintaining fuel rods in their correct position, the transfer of heat from the fuel rods to the coolant to be promoted so as to raise the allowable power level of the fuel assembly, and enables the void ratio to be lowered so as to increase the reactivity.

    摘要翻译： 在具有插入燃料间隔件的规则布置的单元中的燃料棒的燃料组件中，燃料棒将燃料棒彼此正确地间隔开并具有沿着燃料棒的纵向设置成多级的间隔元件，燃料间隔件包括叶片 形成在电池上，使得每个叶片从形成在电池的侧壁的一部分中的切口弯曲。 叶片倾斜地突出到相邻燃料棒之间的相应空间中，并允许冷却剂流过空间并形成两相流以产生朝向燃料棒的旋流。 燃料间隔器可以可选地包括具有内置叶片或螺旋叶片的薄壁圆柱体，其固定到未经受任何直接加工的间隔件。 还公开了一种具有任何上述燃料间隔件的燃料组件。 本发明的结构在确保足够的强度以保持燃料棒处于其正确位置的同时，能够将热量从燃料棒传递到冷却剂以提高燃料组件的允许功率水平， 使空隙率降低，从而提高反应性。

    System for preventing erroneous operation of control rods
    5.
    发明授权
    System for preventing erroneous operation of control rods 失效
    防止控制棒错误操作的系统

    公开(公告)号：US4282061A

    公开(公告)日：1981-08-04

    申请号：US13833

    申请日：1979-02-22

    申请人： Mikio Sakurai ,  Yuichiro Yoshimoto ,  Shiro Nakamura

    发明人： Mikio Sakurai ,  Yuichiro Yoshimoto ,  Shiro Nakamura

    IPC分类号： G21C7/36 ,  G21C7/06

    CPC分类号： G21C7/36 ,  Y02E30/39

    摘要： System for preventing erroneous operation of control rods for securing a safety control of a nuclear reactor. The erroneous operation preventing system is comprised of a control rod objective position setting means for setting an objective position of a control rod, a control rod position detector for detecting a position of the control rod, and an operation means which operates a difference between the objective position set up and the detected position of the control rod being operated and produces a signal for blocking the control rod operation when the control rod is operated so that the difference goes away from zero. The erroneous operation blocking system stops the control rod at the first possible control rod stopping position. The erroneous operation preventing system includes a return operation commanding unit for compensating for erroneous operation of the control rod when the control rod is erroneously operated.

    摘要翻译： 用于防止控制棒错误操作以确保核反应堆安全控制的系统。 该错误操作防止系统包括用于设定控制棒的目标位置的控制杆物镜位置设定装置，用于检测控制棒的位置的控制棒位置检测器和操作该物镜之间的差异的操作装置 位置设置和控制杆的检测位置被操作，并且当控制杆被操作时产生用于阻挡控制杆操作的信号，使得差值远离零。 错误的操作阻挡系统在第一个可能的控制杆停止位置停止控制杆。 错误操作防止系统包括返回操作指令单元，用于当控制杆被错误地操作时补偿控制杆的错误操作。

    Fuel assembly
    8.
    发明授权
    Fuel assembly 失效
    燃油总成

    公开(公告)号：US5128098A

    公开(公告)日：1992-07-07

    申请号：US639256

    申请日：1991-01-09

    申请人： Shozo Nakamura ,  Tadashi Mizuno ,  Junjiro Nakajima ,  Yoshihiko Yanagi ,  Hajime Umehara ,  Tetsuo Yasuda ,  Akira Maru ,  Junichi Yamashita ,  Yuichiro Yoshimoto ,  Tatsuo Hayashi

    发明人： Shozo Nakamura ,  Tadashi Mizuno ,  Junjiro Nakajima ,  Yoshihiko Yanagi ,  Hajime Umehara ,  Tetsuo Yasuda ,  Akira Maru ,  Junichi Yamashita ,  Yuichiro Yoshimoto ,  Tatsuo Hayashi

    IPC分类号： G21C3/322

    CPC分类号： G21C3/322 ,  Y02E30/38

    摘要： A fuel assembly comprises a plurality of fuel rods, a lower tie plate for supporting lower ends of the fuel rods, and a channel box surrounding a bundle of the fuel rods and the circumference of the lower tie plate to thereby define a cooling water leak passage between the lower tie plate and the channel box. The fuel assembly includes a venturi provided in the lower tie plate for generating a force tending to attract the channel box toward the lower tie plate under the action of a leak stream of the cooling water passing through the cooling water leak passage. The fuel assembly also includes an arrangement provided in the lower tie plate for suppressing vibrations of the channel box caused upon an influence of the venturi.

    摘要翻译： 燃料组件包括多个燃料棒，用于支撑燃料棒的下端的下连接板，以及围绕燃料棒束和下连接板的圆周的通道箱，从而限定冷却水泄漏通道 在下连接板和通道箱之间。 燃料组件包括设置在下连接板中的文氏管，用于在通过冷却水泄漏通道的冷却水的泄漏流的作用下产生倾向于将通道箱吸引到下连接板的力。 燃料组件还包括设置在下连接板中用于抑制文丘里管的影响引起的通道箱振动的装置。

    Control rod
    10.
    发明授权
    Control rod 失效
    控制杆

    公开(公告)号：US4874574A

    公开(公告)日：1989-10-17

    申请号：US23230

    申请日：1987-03-09

    申请人： Takao Igarashi ,  Satoshi Sugawara ,  Yuichiro Yoshimoto ,  Shozo Saito ,  Takashi Fukumoto ,  Zenichiro Endo ,  Katsutoshi Shinbo

    发明人： Takao Igarashi ,  Satoshi Sugawara ,  Yuichiro Yoshimoto ,  Shozo Saito ,  Takashi Fukumoto ,  Zenichiro Endo ,  Katsutoshi Shinbo

    IPC分类号： G21C7/113

    CPC分类号： G21C7/113 ,  G21Y2002/201 ,  G21Y2002/206 ,  G21Y2004/30 ,  Y02E30/39

    摘要： A control rod has blades each of which includes a neutron absorption region in which neutron absorbers each loaded to the core of a reactor from below and made of absorption nuclear chain type neutron absorber are disposed. The neutron absorption region is divided into two, upper and lower, regions in an axial direction; the boundary between the upper and lower regions is positioned within the range of from 3/8 to 5/8 of the full length of the neutron absorption region in the axial direction from the lower end of the neutron absorption region; and the quantity of the absorption nuclear chain type neutron absorber contained in the lower region in the section perpendicular to the axial direction is smaller than the quantity of the absorption nuclear chain type neutron absorber contained in the upper region in the section perpendicular to the axial direction.

    摘要翻译： 控制杆具有叶片，每个叶片包括中子吸收区域，其中设置有从吸收核链型中子吸收器制成的从下方装载到反应器的核心的中子吸收体。 中子吸收区域沿轴向分为两个，上部和下部区域; 上部和下部区域之间的边界位于从中子吸收区域的下端沿轴向的中子吸收区域全长的3/8至5/8的范围内; 并且与垂直于轴向的截面中包含在下部区域中的吸收核链型中子吸收剂的量小于垂直于轴向的截面中包含在上部区域中的吸收核链型中子吸收剂的量 。