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20 条记录 (耗时 0.021 秒)

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

    公开(公告)号：US4695425A

    公开(公告)日：1987-09-22

    申请号：US657082

    申请日：1984-10-03

    申请人： Motoo Aoyama ,  Hiromi Maruyama ,  Kikuo Umegaki ,  Sadao Uchikawa

    发明人： Motoo Aoyama ,  Hiromi Maruyama ,  Kikuo Umegaki ,  Sadao Uchikawa

    IPC分类号： G21C3/328 ,  G21C3/32

    CPC分类号： G21C3/328 ,  G21Y2002/201 ,  G21Y2004/10 ,  G21Y2004/30 ,  G21Y2004/60 ,  Y02E30/38

    摘要： A fuel assembly having a plurality of fuel rods arranged in a lattice state and being charged into a core of a nuclear reactor using light water as a coolant, which comprises the fuel rods consisting of a first group of fuel rods and a second group of fuel rods, an average concentration of U.sup.236 in the first group being lower than an average concentration of U.sup.236 in the second group, and the first group and the second group being arranged unevenly in the fuel assembly, preferably, a fuel assembly wherein the first group is arranged at the periphery of the fuel assembly, and the second group being arranged at positions other than the periphery, has a low reactivity penalty due to U.sup.236 and can reduce the requirements for natural uranium.

    摘要翻译： 一种燃料组件，其具有以格状状布置的多个燃料棒，并使用轻水作为冷却剂装入核反应堆的核心，燃料棒包括由第一组燃料棒组成的燃料棒和第二组燃料 第一组中的U236的平均浓度低于第二组中的U236的平均浓度，并且第一组和第二组不均匀地布置在燃料组件中，优选地，其中第一组为 布置在燃料组件的周边，并且第二组布置在除了外围之外的位置，由于U236而具有低的反应性损失，并且可以降低对天然铀的要求。

    Light water moderation type nuclear reactor
    2.
    发明授权
    Light water moderation type nuclear reactor 失效
    轻水缓和型核反应堆

    公开(公告)号：US4851181A

    公开(公告)日：1989-07-25

    申请号：US123542

    申请日：1987-11-20

    申请人： Renzo Takeda ,  Kanji Kato ,  Tadahiro Ohnishi ,  Sadao Uchikawa ,  Hiromi Maruyama ,  Motoo Aoyama ,  Kikuo Umegaki ,  Yasunori Bessho ,  Motomasa Fuse ,  Michiro Yokomi

    发明人： Renzo Takeda ,  Kanji Kato ,  Tadahiro Ohnishi ,  Sadao Uchikawa ,  Hiromi Maruyama ,  Motoo Aoyama ,  Kikuo Umegaki ,  Yasunori Bessho ,  Motomasa Fuse ,  Michiro Yokomi

    IPC分类号： G21C5/12 ,  G21C1/08 ,  G21C3/328 ,  G21C5/00 ,  G21C5/18

    CPC分类号： G21C5/18 ,  Y02E30/40

    摘要： In a light water moderation type nuclear reactor with the once-through method, the reactor core is divided into a central area and a peripheral area by a partition member, a first fuel assembly is arranged in the central area (high conversion area) and a second fuel assembly is arranged in the peripheral area. The ratio (r.sub.H/U) of the number of hydrogen atoms to that of uranium atoms in the central area is smaller than that of the ratio in the peripheral area and the second fuel assembly in the peripheral area is formed of fuel rods of the first fuel assembly having been previously burned in the central area and moved into the peripheral area. The plutonium production increases and uranium consumption is reduced during the first half of the lifetime of the fuel rods in the high conversion area with the take-up burn up increasing during the second half of the lifetime of the fuel rods in the burner area.

    摘要翻译： 在具有一次通过方法的轻水调节型核反应堆中，反应堆堆芯通过分隔构件分成中心区域和周边区域，第一燃料组件布置在中心区域（高转化区域）和 第二燃料组件布置在周边区域中。 中心区域的氢原子数与铀原子数的比值（rH / U）小于外围区域的比例，并且周边区域中的第二燃料组件的比率（rH / U）由第一 燃料组件先前已经在中心区域燃烧并移动到周边区域。 在高转化率区域的燃料棒的寿命的前半期，钚的生产增加，铀的消耗减少，在燃烧器区域的燃料棒的寿命的后半期，吸收燃烧增加。

    Fuel assembly
    5.
    发明授权
    Fuel assembly 失效
    燃油组件

    公开(公告)号：US4832906A

    公开(公告)日：1989-05-23

    申请号：US850680

    申请日：1986-04-11

    申请人： Motoo Aoyama ,  Hiromi Maruyama ,  Yasunori Bessho ,  Sadao Uchikawa

    发明人： Motoo Aoyama ,  Hiromi Maruyama ,  Yasunori Bessho ,  Sadao Uchikawa

    IPC分类号： G21C3/28 ,  G21C3/30 ,  G21C3/328

    CPC分类号： G21C3/328 ,  G21Y2002/201 ,  G21Y2002/301 ,  G21Y2004/10 ,  G21Y2004/30 ,  Y02E30/38 ,  Y10S376/903 ,  Y10S376/917

    摘要： A fuel assembly comprises a channel box, upper and lower tie plates fixed to the upper and lower portion of the channel box and a bundle of fuel rods enclosed in the channel box and retained by the upper and lower tie plates. The bundle of fuel rods includes ordinary fuel rods containing fissile material not containing gadolinia, and gadolinia-containing rods each containing gadolinia therein and having a larger outer diameter than that of the ordinary fuel rod. The gadolinia-containing rod has pellets enclosed in a closed cladding, and the outer diameters of the pellets also are larger than these of fuel pellets of the ordinary fuel rods.

    摘要翻译： 燃料组件包括通道箱，固定到通道箱的上部和下部的上部和下部固定板，以及封闭在通道箱中并由上部和下部连接板保持的燃料棒束。 燃料棒束包括含有不含钆的裂变材料的普通燃料棒和含有氧化钆并且具有比普通燃料棒大的外径的含钆棒。 含钆棒具有封闭在封闭包层中的颗粒，并且颗粒的外径也大于普通燃料棒的燃料颗粒的外径。

    Fuel assembly
    6.
    发明授权
    Fuel assembly 失效
    燃油组件

    公开(公告)号：US4826654A

    公开(公告)日：1989-05-02

    申请号：US946960

    申请日：1986-12-29

    申请人： Motoo Aoyama ,  Yasunori Bessho ,  Yuichi Morimoto ,  Hiromi Maruyama ,  Sadao Uchikawa

    发明人： Motoo Aoyama ,  Yasunori Bessho ,  Yuichi Morimoto ,  Hiromi Maruyama ,  Sadao Uchikawa

    IPC分类号： G21C3/30 ,  G21C3/32 ,  G21C3/328

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

    摘要： A fuel assembly comprises a plurality of fuel rods, moderator rods disposed among the fuel rods, upper and lower tie plates for holding both end portions of the fuel rods and the moderator rods, and fuel spacers for keeping distances between the fuel rods and the moderator rods constant. The fuel assembly is characterized in that there is provided a space region extending from the upper tie plate to the lower tie plate and having a space enough to dispose at least one of the fuel rods. At least one of the moderator rods being disposed adjacent to the space region. The fuel rods, the moderator rods, and the space region are disposed in a grid form.

    摘要翻译： 燃料组件包括多个燃料棒，设置在燃料棒之间的调节杆，用于保持燃料棒和调节杆的两个端部的上部和下部连接板以及用于保持燃料棒和调节剂之间的距离的燃料间隔件 棒常数。 燃料组件的特征在于，设置有从上连接板延伸到下连接板的空间区域，并且具有足以设置至少一个燃料棒的空间。 至少一个调节杆设置成与该空间区域相邻。 燃料棒，调节杆和空间区域以网格形式布置。

    Method of controlling operation of nuclear reactor
    8.
    发明授权
    Method of controlling operation of nuclear reactor 失效
    控制核反应堆运行的方法

    公开(公告)号：US4368171A

    公开(公告)日：1983-01-11

    申请号：US210168

    申请日：1980-11-25

    申请人： Hiromi Maruyama ,  Masayuki Izumi ,  Sadao Uchikawa ,  Renzo Takeda

    发明人： Hiromi Maruyama ,  Masayuki Izumi ,  Sadao Uchikawa ,  Renzo Takeda

    IPC分类号： G21C7/00 ,  G21C7/08

    CPC分类号： G21C7/00 ,  G21Y2002/201 ,  G21Y2004/40 ,  Y02E30/39

    摘要： A method of operating a nuclear reactor adapted to use cross-shaped control rods. The control rods are grouped into a plurality of groups having a first group consisting of a control rod located at the center of the core, a second group consisting of 8 control rods surrounding the control rod of the first group, a third group consisting of control rods located adjacent to and outside of the control rods of the second group, and other groups determined successively in the same manner as in the third group. During the operation period other than the period in which the number of the control rods to be inserted for realizing the critical condition of said nuclear reactor is less than 6, the nuclear reactor is operated with control rod patterns in which the inserted control rods are selected from control rods of alternate or every other groups of said groups so as to include at least a pair of control rods which are located in a similar manner to that of the KNIGHT's movement on a chess board.

    摘要翻译： 一种操作适于使用十字形控制棒的核反应堆的方法。 控制杆被分组成多个组，其具有第一组，第一组由位于芯的中心的控制棒组成，第二组由围绕第一组的控制棒的8个控制棒组成，第三组包括控制 位于第二组的控制棒附近和外侧的杆，以及与第三组相同的方式连续确定的其他组。 在操作期间，为了实现上述核反应堆的临界状态而插入的控制杆的数量少于6的期间，核反应堆以选择插入的控制棒的控制杆模式进行操作 从所述组的交替或其他组的控制棒中，至少包括一对控制棒，其以类似于在棋盘上的KNIGHT的运动的方式定位。

    Method of operating nuclear reactors
    9.
    发明授权
    Method of operating nuclear reactors 失效
    运行核反应堆的方法

    公开(公告)号：US4248667A

    公开(公告)日：1981-02-03

    申请号：US936922

    申请日：1978-08-25

    申请人： Sadao Uchikawa ,  Masayuki Izumi ,  Hiromi Maruyama ,  Renzo Takeda

    发明人： Sadao Uchikawa ,  Masayuki Izumi ,  Hiromi Maruyama ,  Renzo Takeda

    IPC分类号： G21C7/00 ,  G21C7/08

    CPC分类号： G21C7/00 ,  G21C7/08 ,  G21Y2002/201 ,  G21Y2004/10 ,  G21Y2004/40 ,  Y02E30/39

    摘要： A method of operating a nuclear reactor wherein the reactor is operated for more than 50% of its operating period with the control rod patterns in which, in the central region of the reactor core accounting for at least 50% thereof, the control rods inserted from the bottom of the reactor core are at the depths of between 16/24 and 21/24 of the height of the reactor core with eight control rods surrounding each of said inserted control rods being fully withdrawn.

    摘要翻译： 一种操作核反应堆的方法，其中反应器的操作时间超过其操作周期的50％，其中控制杆模式在反应堆芯的中心区域占其至少50％，控制棒从 反应堆芯的底部处于反应堆堆芯的高度的16/24和21/24之间的深度，八个控制杆围绕着每个插入的控制杆被完全拉出。

    Core loading strategy
    10.
    发明授权
    Core loading strategy 失效
    核心加载策略

    公开(公告)号：US5093070A

    公开(公告)日：1992-03-03

    申请号：US448209

    申请日：1989-12-08

    申请人： Junichi Koyama ,  Motoo Aoyama ,  Akinobu Nakajima ,  Hiromi Maruyama

    发明人： Junichi Koyama ,  Motoo Aoyama ,  Akinobu Nakajima ,  Hiromi Maruyama

    IPC分类号： G21C5/00 ,  G21C5/18 ,  G21C7/00 ,  G21C19/20

    CPC分类号： G21C19/205 ,  G21C7/00 ,  G21Y2002/201 ,  G21Y2004/10 ,  G21Y2004/40 ,  Y02E30/31 ,  Y02E30/39

    摘要： A core of boiling water reactor is divided into a central region and a peripheral region surrounding it in the radial direction thereof. The loading fraction of new first fuel assemblies containing burnable poison and loaded in the central region is greater than the loading fraction of the new first fuel assemblies loaded in the peripheral region. The loading fraction of second fuel assemblies loaded in the central region of the core and operating in a second operation cycle is smaller than the loading fraction of the second fuel assemblies loaded in the peripheral region of the core and operating in the second operation cycle. The second fuel assemblies contain no burnable poison. In such a core, the reactivity of the peripheral region is greater than that of the central region in the beginning of an operation cycle. Contrary, the reactivity of the central region is greater than that of the peripheral region in the end of an operation cycle.

    摘要翻译： 沸水反应器的核心沿径向方向被分为中心区域和围绕它的周边区域。 包含可燃毒物并装载在中心区域的新的第一燃料组件的负载分数大于装载在周边区域中的新的第一燃料组件的负载分数。 负载在芯的中心区域并在第二操作循环中操作的第二燃料组件的负载分数小于装载在铁芯的周边区域并在第二操作循环中操作的第二燃料组件的负载分数。 第二燃料组件不含可燃毒物。 在这样的核心中，在操作周期开始时，周边区域的反应性大于中心区域的反应性。 相反，在操作周期结束时，中心区域的反应性大于外围区域的反应性。