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。

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of the height of the reactor core with eight control rods surrounding each of said inserted control rods being fully withdrawn.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。

公开(公告)号：US4244784A

公开(公告)日：1981-01-13

申请号：US835964

申请日：1977-09-23

申请人： Renzo Takeda ,  Kunitoshi Kurihara ,  Masaaki Yamamoto ,  Sadao Uchikawa ,  Michiro Yokomi ,  Junichi Yamashita ,  Takanori Shimoshige

发明人： Renzo Takeda ,  Kunitoshi Kurihara ,  Masaaki Yamamoto ,  Sadao Uchikawa ,  Michiro Yokomi ,  Junichi Yamashita ,  Takanori Shimoshige

IPC分类号： G21C7/00 ,  G21C1/08 ,  G21C3/328 ,  G21C5/12 ,  G21C15/02

CPC分类号： G21C1/084 ,  G21C3/328 ,  Y02E30/31 ,  Y02E30/38

摘要： A construction of boiling water reactor core having a plurality of fuel assemblies. Some of fuel assemblies have an infinite multiplication factor which is larger at their upper regions than at their lower portions, so that the effective multiplication factor of the reactor core is larger at the upper portion than at the lower portion of the reactor core under an equal condition. Consequently, a relatively flat axial power distribution is established even under an uneven axial void distribution.

摘要翻译： 具有多个燃料组件的沸水反应堆堆芯的结构。 一些燃料组件具有无限倍增因子，在其上部区域比在其下部较大，因此反应堆堆芯的有效倍增系数在上部比在反应堆芯的下部较大 条件。 因此，即使在不均匀的轴向空隙分布下也建立了相对平坦的轴向功率分布。

公开(公告)号：US4229258A

公开(公告)日：1980-10-21

申请号：US835962

申请日：1977-09-23

申请人： Renzo Takeda ,  Sadao Uchikawa ,  Kunitoshi Kurihara ,  Masaaki Yamamoto ,  Michiro Yokomi ,  Junichi Yamashita ,  Jun Takamatsu

发明人： Renzo Takeda ,  Sadao Uchikawa ,  Kunitoshi Kurihara ,  Masaaki Yamamoto ,  Michiro Yokomi ,  Junichi Yamashita ,  Jun Takamatsu

IPC分类号： G21C7/00 ,  G21C3/32 ,  G21C3/328 ,  G21C5/12 ,  G21C7/04 ,  G21C3/02

CPC分类号： G21C3/328 ,  G21C7/04 ,  G21C3/32 ,  G21Y2002/201 ,  G21Y2004/10 ,  G21Y2004/40 ,  Y02E30/31 ,  Y02E30/38 ,  Y02E30/39

摘要： A fuel assembly suitable for use in boiling water reactor. The fuel assembly has a specific pattern of distribution of enrichment, so that the upper region of the assembly has a larger infinite multiplication factor than that of the lower region. In an example, the distribution of enrichment is such that the upper region has a mean enrichment larger than that of the lower region, while, in another example, the mean enrichment is maintained constant over the length of the assembly but the difference of enrichments between the central and peripheral portions of a plane normal to the axis of the assembly is made smaller at the upper region than at the lower region.

摘要翻译： 适用于沸水反应堆的燃料组件。 燃料组件具有特定的浓缩分布模式，使得组件的上部区域具有比下部区域更大的无限倍增系数。 在一个实例中，富集的分布使得上部区域的平均浓度大于下部区域的平均富集，而在另一个示例中，平均富集在组件的长度上保持恒定，但是浓度的差异 垂直于组件的轴线的平面的中心和周边部分在上部区域比在下部区域处更小。