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1. 发明授权

US4229258A Fuel assembly 失效
标题翻译：燃油组件
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。

2. 发明授权

US4244784A Construction of nuclear reactor core 失效
标题翻译：核反应堆核心建设
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。

3. 发明授权

US4851181A Light water moderation type nuclear reactor 失效
标题翻译：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。

4. 发明授权

US4292128A Boiling water type nuclear reactor 失效
标题翻译：沸水型核反应堆
公开(公告)号：US4292128A
公开(公告)日：1981-09-29
申请号：US942558
申请日：1978-09-15
申请人： Renzo Takeda , Kunitoshi Kurihara , Sadao Uchikawa
发明人： Renzo Takeda , Kunitoshi Kurihara , Sadao Uchikawa
IPC分类号： G21C7/26 , G21C7/02 , G21C7/32 , G21C7/00
CPC分类号： G21C7/02 , G21Y2002/201 , G21Y2004/10 , G21Y2004/302 , G21Y2004/40 , Y02E30/39
摘要： A boiling water type nuclear reactor adapted to be operated at a void quality (weight ratio of vapor in the coolant) of coolant at the core outlet of 17% or higher. By adopting this level of void quality, a void quality exceeding 8.5% is available at least in the upper half region of the core which in turn provides a void fraction of 66% or higher. Consequently, it is possible to reduce the enrichment of the fuel, so as to allow a more efficient use of the fuel. At the same time, due to the reduced power generating rate, the range over which the flow rate of coolant is controlled is widened, so that it becomes possible to change the reactivity solely by controlling the flow rate of the coolant. It is therefore possible to operate the reactor over whole operation cycle with its control rods fully withdrawn.
摘要翻译：一种沸水型核反应堆，适于在核心出口处的冷却剂的空隙质量（冷却剂中的蒸汽的重量比）为17％或更高的温度下操作。通过采用该水平的空隙质量，至少在芯的上半部区域可以获得超过8.5％的空隙质量，这又提供66％或更高的空隙率。因此，可以减少燃料的浓缩，从而更有效地利用燃料。同时，由于发电率降低，控制冷却剂流量的范围扩大，从而可以通过控制冷却剂的流量来改变反应性。因此，可以在整个操作周期内操作反应器，其控制棒完全拉出。

5. 发明授权

US5145635A Fuel assembly and nuclear reactor 失效
标题翻译：燃料组件和核反应堆
公开(公告)号：US5145635A
公开(公告)日：1992-09-08
申请号：US669378
申请日：1991-03-14
申请人： Kazuya Ishii , Motoo Aoyama , Yoshihiko Ishii , Sadao Uchikawa , Renzo Takeda , Osamu Yokomizo
发明人： Kazuya Ishii , Motoo Aoyama , Yoshihiko Ishii , Sadao Uchikawa , Renzo Takeda , Osamu Yokomizo
IPC分类号： G21C3/328 , G21C3/62
CPC分类号： G21C3/328 , G21Y2002/201 , G21Y2002/207 , G21Y2004/10 , G21Y2004/30 , Y02E30/38
摘要： A high conversion nuclear reactor core has fuel assemblies made up from large numbers of axially-extending uranium-plutonium mixed oxide fuel rods. The fuel rods are densely packed so as to give a high conversion ratio of fissile substances, preferably approaching unity. The average plutonium enrichment in the assemblies is higher in their bottom, upstream halves, than in their top downstream halves. This has the effect of reducing a potentially dangerously high void coefficient in the core.

6. 发明授权

US4876062A Fuel assembly 失效
标题翻译：燃油组件
公开(公告)号：US4876062A
公开(公告)日：1989-10-24
申请号：US172418
申请日：1988-03-24
申请人： Motoo Aoyama , Yasunori Bessho , Sadao Uchikawa , Renzo Takeda , Yoshihiko Ishii
发明人： Motoo Aoyama , Yasunori Bessho , Sadao Uchikawa , Renzo Takeda , Yoshihiko Ishii
IPC分类号： G21C3/328 , G21C3/322 , G21C3/326 , G21C7/00
CPC分类号： G21C3/322 , G21C2003/3225 , G21Y2002/201 , G21Y2004/30 , Y02E30/38
摘要： A fuel assembly of the present invention comprises a plurality of fuel rods which are held by an upper tie plate and lower tie plate at the ends thereof and a moderating rod which is arranged between the fuel rods and held by the lower tie plate at its lower end. The fuel rods are arranged in a lattice form having 9 rows and 9 columns, and the moderating rod contains a passage for a coolant and has a cruciate cross-sectional form. The ratio A.sub.M /A.sub.C of the area A.sub.M of a moderator region in the moderating rod in the cross-sectional plane in which the moderator is present to the area A.sub.C of the coolant passages in said fuel assembly is within the range of 0.07 to 0.11, and the area A.sub.M is 75% or more of the total area of the fuel lattice units in which none of the fuel rods is arranged, but the moderating rod is arranged.

7. 发明授权

US4378329A Nuclear reactor core construction 失效
标题翻译：核反应堆核心建设
公开(公告)号：US4378329A
公开(公告)日：1983-03-29
申请号：US158363
申请日：1980-06-11
申请人： Sadao Uchikawa , Motomasa Fuse , Yasuhiro Kobayashi , Renzo Takeda
发明人： Sadao Uchikawa , Motomasa Fuse , Yasuhiro Kobayashi , Renzo Takeda
IPC分类号： G21C5/12 , G21C5/00 , G21C5/18 , G21C7/04 , G21C3/32
CPC分类号： G21C7/04 , G21C5/00 , G21Y2002/201 , G21Y2004/10 , G21Y2004/30 , Y02E30/39
摘要： A core construction for a nuclear reactor having a multiplicity of fuel cells forming a core in which each fuel cell includes four fuel assemblies arranged in adjacent relationship and one control rod insertable into a position surrounded by the four fuel assemblies. The fuel cells includes first fuel cells each having a relatively high cell mean infinite neutron multiplication factor and including one fuel assembly containing a burnable poison, and second fuel cells each having a relatively low cell mean infinite neutron multiplication factor and including no fuel assembly containing a burnable poison. The first fuel cells are arranged both in a central zone of the core disposed within about one-half the core radius from the center of the core and in a circumferential zone of the core outside the central zone. The second fuel cells are arranged only in the central zone and no second fuel cells are arranged in the circumferential zone. Only the second fuel cells provide control cells in which the control rods are operative to adjust core reactivity changes and power distribution changes during normal power operation of the reactor.
摘要翻译：一种用于核反应堆的核心结构，其具有形成核心的多个燃料电池，其中每个燃料电池包括相邻关系排列的四个燃料组件，以及可插入由四个燃料组件包围的位置的一个控制棒。燃料电池包括每个具有相对高的电池平均无限中子倍增因子的第一燃料电池，并且包括一个包含可燃毒物的燃料组件，以及每个具有相对低的电池平均无限中子倍增因子的第二燃料电池，并且不包括燃料组件，可燃毒第一燃料电池被布置在核心的中心区域中，该中心区域设置在离核心的中心大约一半半径的芯半径处，并且在芯部的圆周区域中央区域外部。第二燃料电池仅布置在中心区域中，并且在周向区域中不设置第二燃料电池。只有第二燃料电池提供控制电池，其中控制棒可操作以在电抗器的正常电力操作期间调节铁心反应性变化和配电变化。

8. 发明授权

US4368171A Method of controlling operation of nuclear reactor 失效
标题翻译：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。

9. 发明授权

US4248667A Method of operating nuclear reactors 失效
标题翻译：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。

10. 发明申请

US20120177169A1 Core of Light Water Reactor and Fuel Assembly 有权
标题翻译：轻水反应堆和燃料组件的核心
公开(公告)号：US20120177169A1
公开(公告)日：2012-07-12
申请号：US13411091
申请日：2012-03-02
申请人： Renzo Takeda , Junichi Miwa , Kumiaki Moriya
发明人： Renzo Takeda , Junichi Miwa , Kumiaki Moriya
IPC分类号： G21C7/00 , G21C3/30
CPC分类号： G21C3/326 , G21C3/42 , G21C2003/3267 , Y02E30/38
摘要： A core of a light water reactor having a plurality of fuel assemblies, which are loaded in said core, having nuclear fuel material containing a plurality of isotopes of transuranium nuclides, an upper blanket zone, a lower blanket zone, and a fissile zone, in which the transuranium nuclides are contained, disposed between the upper blanket zone and the lower blanket zone, wherein a ratio of Pu-239 in all the transuranium nuclides contained in the loaded fuel assembly is in a range of 40 to 60% when burnup of the fuel assembly is 0, sum of a height of the lower blanket zone and a height of the upper blanket zone is in a range of 250 to 600 mm, and the height of said lower blanket zone is in a range of 1.6 to 12 times the height of the upper blanket zone.
摘要翻译：具有多个燃料组件的轻水反应堆的核心，其装载在所述芯体中，具有含有多个氮氧化物的多个同位素的核燃料材料，上覆层区域，下覆盖区域和裂变区域其中包含超氧化物核素，其设置在上覆盖区域和下覆盖层区域之间，其中，当燃烧所述载体燃料组件时，包含在所述负载的燃料组件中的所有经核素核素中的Pu-239的比例在40至60％的范围内燃料组件为0，下橡皮布区域的高度与上覆层区域的高度之和在250至600mm的范围内，并且所述下橡皮布区域的高度在1.6至12倍的范围内上层毯的高度。

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