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1. 发明授权

US5617456A Fuel assembly and nuclear reactor 失效
标题翻译：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。

2. 发明授权

US5299244A Fuel assembly 失效
标题翻译：燃油组件
公开(公告)号：US5299244A
公开(公告)日：1994-03-29
申请号：US772440
申请日：1991-10-07
申请人： Koki Yamauchi , Yasunori Bessho , Sadayuki Izutsu
发明人： Koki Yamauchi , Yasunori Bessho , Sadayuki Izutsu
IPC分类号： G21C3/326 , G21C3/328 , G21C3/34
CPC分类号： G21C3/328 , G21Y2002/201 , G21Y2004/302 , Y02E30/38
摘要： A plurality of fuel rods containing fissile material are arranged in triangle lattices. A plurality of water rods groups are arranged among the fuel rods. Each of the water rods groups includes no fuel rod but a plurality of water rods which are arranged adjacently each other in triangle lattices having substantially same pitch as the fuel rods. The water rods groups are arranged not adjacently each other, and are surrounded with the fuel rods. the outer diameter of the water rod is smaller than the pitch. The fuel assembly is able to suppress increment of pressure loss because of formation of coolant path among adjacent water rods. Further, void reactivity coefficient is able to be small.
摘要翻译：包含易裂变材料的多个燃料棒被布置成三角形格子。燃料棒之间布置有多个水杆组。每个水棒组不包括燃料棒，而是包括与燃料棒具有基本相同节距的三角形格架相邻布置的多个水杆。水杆组彼此相邻配置，并被燃料棒包围。水杆的外径小于间距。燃料组件由于在相邻的水棒之间形成冷却剂路径而能够抑制压力损失的增加。此外，空隙反应性系数能够小。

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

US5528641A Fuel assembly 失效
标题翻译：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。

5. 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.

6. 发明授权

US5640435A Fuel assembly and nuclear reactor 失效
公开(公告)号：US5640435A
公开(公告)日：1997-06-17
申请号：US214760
申请日：1994-03-18
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： G21C3/322 , G21C3/328 , G21C3/32 , G21C15/02
CPC分类号： G21C3/328 , G21C2003/3225 , G21Y2002/201 , G21Y2002/302 , G21Y2002/401 , G21Y2004/30 , G21Y2004/40 , 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.

7. 发明授权

US5207979A Nuclear fuel assemblies and reactor cores including them 失效
标题翻译：核燃料组件和反应堆核心，包括它们
公开(公告)号：US5207979A
公开(公告)日：1993-05-04
申请号：US496309
申请日：1990-03-20
申请人： Junichi Koyama , Motoo Aoyama , Akinobu Nakajima , Yasunori Bessho , Junichi Yamashita , Sadao Uchikawa , Hiromi Maruyama , Michihiro Ozawa , Mitsunari Nakamura
发明人： Junichi Koyama , Motoo Aoyama , Akinobu Nakajima , Yasunori Bessho , Junichi Yamashita , Sadao Uchikawa , Hiromi Maruyama , Michihiro Ozawa , Mitsunari Nakamura
IPC分类号： G21C3/326
CPC分类号： G21C3/326 , G21Y2002/201 , G21Y2004/30 , Y02E30/38
摘要： A nuclear fuel assembly has an array of fuel rods comprising a plurality of first fuel rods each containing nuclear fuel material but not containing burnable poison and a plurality of further fuel rods each containing both nuclear fuel material and burnable poison. The further fuel rods comprise second fuel rods and third fuel rods, and each second fuel rod has at a lower region of the fuel assembly a burnable poison concentration which is a minimum burnable poison concentration in the further fuel rods. To increase the effectiveness of the second fuel rods in controlling axial power peaking, as seen in plan view on the array, the first fuel rods are the nearest neighbors of each further fuel rod.
摘要翻译：核燃料组件具有燃料棒阵列，其包括多个第一燃料棒，每个第一燃料棒包含核燃料材料但不含有可燃毒物，以及多个另外的燃料棒，每个燃料棒同时包含核燃料材料和可燃毒物。另外的燃料棒包括第二燃料棒和第三燃料棒，并且每个第二燃料棒在燃料组件的较低区域处具有在另外的燃料棒中是可燃毒物浓度的可燃毒物浓度。为了提高第二燃料棒在控制轴向功率峰化方面的有效性，如在阵列的平面图中所见，第一燃料棒是每个另外的燃料棒的最邻近的。

8. 发明授权

US4832906A Fuel assembly 失效
标题翻译：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。

9. 发明授权

US4826654A Fuel assembly 失效
标题翻译：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。

10. 发明授权

US4789520A Fuel assembly and nuclear reactor 失效
标题翻译：燃料装配和核反应堆
公开(公告)号：US4789520A
公开(公告)日：1988-12-06
申请号：US77513
申请日：1987-07-24
申请人： Yuichi Morimoto , Hiromi Maruyama , Motoo Aoyama , Atsushi Zukeran , Yasunori Bessho , Tomoyuki Matsumoto , Yoshihiko Ishii , Kouji Fujimura , Sadao Uchikawa
发明人： Yuichi Morimoto , Hiromi Maruyama , Motoo Aoyama , Atsushi Zukeran , Yasunori Bessho , Tomoyuki Matsumoto , Yoshihiko Ishii , Kouji Fujimura , Sadao Uchikawa
IPC分类号： G21C3/326 , G21C1/08 , G21C3/30 , G21C3/328 , G21C3/00
CPC分类号： G21C3/328 , G21Y2002/20 , G21Y2004/10 , G21Y2004/30 , Y02E30/38
摘要： A fuel assembly is composed of first fuel rods containing nuclear fuel material and burnable poison material and second fuel rods containing nuclear fuel material but no burnable poison material. The fuel assembly is charged in a high conversion area of a boiling water type nuclear reactor having a reactor core having the high conversion area and a burner area surrounding the high conversion area. A ratio V.sub.C /V.sub.F is not greater than 1.5 in the fuel assembly where V.sub.C is the volume occupied by coolant flow paths and V.sub.F is the volume occupied by the nuclear fuel material per unit length in an axial direction of the fuel assembly. In addition, the burnable poison material is composed of neutron absorption nuclides having at least one resonant energy in a neutron energy region of one electron volt or less.

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