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1. 发明授权

US06516043B1 Fuel assembly and reactor core and fuel spacer and channel box 有权
标题翻译：燃油组件和反应堆核心和燃料间隔物和通道箱
公开(公告)号：US06516043B1
公开(公告)日：2003-02-04
申请号：US09471606
申请日：1999-12-23
申请人： Masao Chaki , Koji Nishida , Motoo Aoyama , Junichi Koyama , Katsumasa Haikawa , Yasuhiro Aizawa
发明人： Masao Chaki , Koji Nishida , Motoo Aoyama , Junichi Koyama , Katsumasa Haikawa , Yasuhiro Aizawa
IPC分类号： G21C300
CPC分类号： G21C3/324 , G21C3/328 , G21C3/332 , Y02E30/31 , Y02E30/38
摘要： A fuel assembly includes a plurality of fuel rods placed in a square lattice array of 9-rows/9-columns and at least one water rod. In this fuel assembly, the fuel rod pitch of the plurality of fuel rods is in a range of 14.15 mm to 14.65 mm, and means for offsetting and holding a fuel bundle composed of the fuel rods and the water rod is provided in such a manner that the center in a cross section of the fuel bundle is offset from the center in a cross section of the lower tie plate toward the channel fastener side. With this configuration, it is possible to provide a fuel assembly for a D-lattice core, which is capable of achieving the fuel economy comparable to that of a C-lattice core without reducing the thermal margin, and of using the existing fuel spacers.
摘要翻译：一种燃料组件包括多个放置在9列/ 9列的正方形格子阵列和至少一个水杆中的燃料棒。在该燃料组件中，多个燃料棒的燃料棒间距在14.15mm〜14.65mm的范围内，由燃料棒和水杆构成的燃料束的抵接和保持装置以这种方式燃料束的横截面中的中心在下连接板的横截面中朝向通道紧固件侧偏离中心。利用这种结构，可以提供一种用于D格子芯的燃料组件，其能够实现与C晶格铁芯的燃料经济性相当而不降低热裕度，并且使用现有的燃料间隔件。

2. 发明授权

US6005905A Initial core 失效
标题翻译：初始核心
公开(公告)号：US6005905A
公开(公告)日：1999-12-21
申请号：US664663
申请日：1996-06-17
申请人： Akihiro Yamanaka , Katsumasa Haikawa , Akiko Kanda , Takaaki Mochida , Junichi Yamashita , Motoo Aoyama , Yoko Yuchi , Junichi Koyama
发明人： Akihiro Yamanaka , Katsumasa Haikawa , Akiko Kanda , Takaaki Mochida , Junichi Yamashita , Motoo Aoyama , Yoko Yuchi , Junichi Koyama
IPC分类号： G21C3/30 , G21C3/326 , G21C3/328 , G21C3/62 , G21C5/00 , G21C7/02 , G21C19/00
CPC分类号： G21C5/00 , G21C7/02 , G21Y2002/201 , G21Y2004/30 , G21Y2004/402 , Y02E30/39
摘要： In an arrangement of an initial core, the core is loaded with 572 high enrichment fuel assemblies H with 4.2 wt % average enrichment and 300 low enrichment fuel assemblies L with 1.5 wt % average enrichment. The average enrichment of the core is about 3.3 wt %. In this core, only the low enrichment fuel assemblies are loaded into the most outer position of the core and the high enrichment fuel assemblies are loaded into an area other than the most outer position. In this arrangement, the average enrichment of reload fuel assemblies is 3.7 wt %.
摘要翻译：在初始核心的布置中，核心装载有572个高浓缩燃料组件H，4.2重量％的平均浓缩物和300个低富集燃料组件L，具有1.5重量％的平均富集度。核心的平均富集度约为3.3重量％。在该核心中，只有低浓度燃料组件被装载到核心的最外部位置，而高浓缩燃料组件被装载到除了最外部位置之外的区域中。在这种布置中，重新加载燃料组件的平均富集为3.7重量％。

3. 发明授权

US06735267B2 Fuel assembly 失效
标题翻译：燃油组件
公开(公告)号：US06735267B2
公开(公告)日：2004-05-11
申请号：US10227441
申请日：2002-08-26
申请人： Akihito Orii , Junichi Koyama , Koji Nishida , Masao Chaki , Toru Kanazawa
发明人： Akihito Orii , Junichi Koyama , Koji Nishida , Masao Chaki , Toru Kanazawa
IPC分类号： G21C332
CPC分类号： G21C3/328 , G21Y2002/201 , G21Y2004/304 , Y02E30/38
摘要： A fuel assembly in accordance with the present invention comprises a plurality of first fuel rods and a plurality of second fuel rods having a length shorter than a length of the first fuel rod, and these two kinds of fuel rods are arranged in a fuel rod array of 10 rows by 10 columns. Two water rods are arranged in regions capable of arranging 8 fuel rods. The second fuel rods are not arranged in the outermost tier of the fuel rod array. Which satisfies the following conditions, that is, B≧60 (Equation 1) 15≦n≦20(n: integer) (Equation 2) Awr/Ach≦0.149 (Equation 3) Lp/Lf≧11/24 (Equation 4) Awr/Ach≧(3.00×10−4×n2+6.00×10−4×n−1.2×10−2)×(Lp/Lf−1)+1.75×10−1 (Equation 5) Awr/Ach≦(8.63×10−4×n2−6.09×10−2×n+1.33×10−1)×(Lp/Lf−8.32×10−1) (Equation 6) where Awr is a total sum of horizontal sectional areas of said water rods, Ach is a horizontal sectional area of a coolant flow passage in a bottom portion of said fuel assembly, Lf is an effective fuel length of said first fuel rod, n is number of said second fuel rods, Lp is an effective length of said second fuel rod, and B (GWd/t) is an average burn-up.
摘要翻译：根据本发明的燃料组件包括多个第一燃料棒和多个第二燃料棒，其长度短于第一燃料棒的长度，并且这两种燃料棒被布置在燃料棒阵列 10行×10列。在能够布置8个燃料棒的区域中布置两个水棒。第二燃料棒不配置在燃料棒阵列的最外层。其满足以下条件，即，Awr是所述水棒的水平截面积的总和，Ach是所述燃料组件的底部中的冷却剂流动通道的水平截面面积，Lf是有效燃料长度的所述第一燃料棒的数量，n是所述第二燃料棒的数量，Lp是所述第二燃料棒的有效长度，B（GWd / t）是平均燃耗。

4. 发明授权

US06335956B1 Fuel assembly 有权
标题翻译：燃油组件
公开(公告)号：US06335956B1
公开(公告)日：2002-01-01
申请号：US09502334
申请日：2000-02-11
申请人： Junichi Koyama , Motoo Aoyama , Koji Nishida , Junichi Yamashita
发明人： Junichi Koyama , Motoo Aoyama , Koji Nishida , Junichi Yamashita
IPC分类号： G21C332
CPC分类号： G21C3/328 , Y02E30/38
摘要： Each of short-length fuel rods 3 is arranged at a position other than in 3×3 corner regions 6 to 9 in such a manner as not to be simultaneously adjacent to a water rod 5 and others of the short-sized fuel rods. Gd fuel rods 4 are arranged at positions excluding the outer periphery, and the number of those of the Gd fuel rods 4 adjacent to the short-length fuel rods 3 is one-half or less the total number of the Gd fuel rods. At a transverse cross-section of a region upward from upper ends of the short-sized fuel rods 3, the amount of burnable poison contained in a polygonal region 10 whose vertexes are located at centers of those of the first fuel rods 3 arranged at the outermost layer is smaller than the amount of burnable poison outside the region 10. With this configuration, a critical power can be improved in consideration of both a distribution of the flow of coolant and a distribution of a thermal power in the fuel assembly.
摘要翻译：短长度的燃料棒3中的每一个都配置在不同于3×3角区域6〜9的位置，不能与短棒燃料棒的水杆5等同时相邻。 Gd燃料棒4配置在除了外周的位置，并且与短长度燃料棒3相邻的Gd燃料棒4的数量是Gd燃料棒的总数的一半以下。在从小型燃料棒3的上端向上方的区域的横截面上，包含在多边形区域10中的可燃毒物的量，其顶点位于布置在第一燃料棒3的第一燃料棒3的顶点的中心最外层的面积小于区域10外部的可燃毒物的量。利用这种结构，考虑到冷却剂的流动分布和燃料组件中的火力分配两者，可以提高临界功率。

5. 发明授权

US6061416A Fuel assembly 失效
公开(公告)号：US6061416A
公开(公告)日：2000-05-09
申请号：US22678
申请日：1998-02-12
申请人： Junichi Koyama , Motoo Aoyama , Koji Nishida , Junichi Yamashita
发明人： Junichi Koyama , Motoo Aoyama , Koji Nishida , Junichi Yamashita
IPC分类号： G21C3/328 , G21C3/32 , G21C3/00 , G21C3/30
CPC分类号： G21C3/328 , Y02E30/38
摘要： Each of short-length fuel rods 3 is arranged at a position other than in 3.times.3 corner regions 6 to 9 in such a manner as not to be simultaneously adjacent to a water rod 5 and others of the short-sized fuel rods. Gd fuel rods 4 are arranged at positions excluding the outer periphery, and the number of those of the Gd fuel rods 4 adjacent to the short-length fuel rods 3 is one-half or less the total number of the Gd fuel rods. At a transverse cross-section of a region upward from upper ends of the short-sized fuel rods 3, the amount of burnable poison contained in a polygonal region 10 whose vertexes are located at centers of those of the first fuel rods 3 arranged at the outermost layer is smaller than the amount of burnable poison outside the region 10. With this configuration, a critical power can be improved in consideration of both a distribution of the flow of coolant and a distribution of a thermal power in the fuel assembly.

6. 发明授权

US5631939A Initial core of nuclear power plant 失效
标题翻译：核电厂的初始核心
公开(公告)号：US5631939A
公开(公告)日：1997-05-20
申请号：US521372
申请日：1995-08-31
申请人： Hiroko Haraguchi , Yoshihiri Iwashita , Toshiro Yoshioka , Junichi Koyama , Akihiro Yamanaka , Mitsunari Nakamura , Katsumasa Haikawa
发明人： Hiroko Haraguchi , Yoshihiri Iwashita , Toshiro Yoshioka , Junichi Koyama , Akihiro Yamanaka , Mitsunari Nakamura , Katsumasa Haikawa
IPC分类号： G21C5/00
CPC分类号： G21C5/00 , G21Y2002/201 , G21Y2004/30 , Y02E30/40
摘要： In an initial core constituted by various kinds of fuel assemblies having a different average enrichment of uranium 235 four fuel assemblies having the lowest average enrichment constitute a square shaped cell. Three fuel assemblies having the highest average enrichment constitute an L-shaped cell, and the L-shaped cell is arranged at corners of the square shaped cells, whereby each assembly of the L-shaped cell adjoins a square shaped cell. The ratio of the number of assemblies of the L-shaped cell to the total number of fuel assemblies in the core is 10% or more.
摘要翻译：在由具有不同铀235的不同浓度的各种燃料组件构成的初始核心中，具有最低平均浓度的四个燃料组件构成一个正方形的电池。具有最高平均浓度的三个燃料组件构成L形电池，并且L形电池被布置在方形电池的拐角处，由此L形电池的每个组件邻接正方形电池。 L形电池的组件数与芯中的燃料组件总数之比为10％以上。

7. 发明授权

US06504889B1 Method of operating reactor 有权
标题翻译：操作反应器的方法
公开(公告)号：US06504889B1
公开(公告)日：2003-01-07
申请号：US09381094
申请日：1999-09-15
申请人： Kenmi Narita , Katsumasa Haikawa , Akihiro Yamanaka , Akiko Kanda , Takaaki Mochida , Junichi Yamashita , Junichi Koyama
发明人： Kenmi Narita , Katsumasa Haikawa , Akihiro Yamanaka , Akiko Kanda , Takaaki Mochida , Junichi Yamashita , Junichi Koyama
IPC分类号： G21C1902
CPC分类号： G21C7/08 , G21F5/02 , G21Y2002/201 , G21Y2004/40 , Y02E30/39
摘要： A method of operating a nuclear reactor reduces the number of reload fuels to be loaded into the nuclear reactor in the second and the following operation cycles. The nuclear reactor has a reactor core in which a plurality of reload fuel assemblies respectively having different infinite multiplication factors are arranged. The method operates the nuclear reactor with control rods inserted in control cells each comprising four reload fuel assemblies having relatively large infinite multiplication factors among the plurality of reload fuel assemblies for a period longer than half of a period of an operation cycle.
摘要翻译：操作核反应堆的方法在第二次和随后的操作循环中减少了要加载到核反应堆中的重新加载燃料的数量。核反应堆具有反应堆堆芯，其中分别具有不同无限倍增系数的多个重载燃料组件被安排。该方法操作核反应堆，其中控制棒插入控制单元中，每个控制单元包括在多个重新加载的燃料组件中具有相对较大的无限倍增因子的四个重载燃料组件，时间长于操作周期的一半。

8. 发明授权

US6141396A Initial loading core 有权
标题翻译：初始加载核心
公开(公告)号：US6141396A
公开(公告)日：2000-10-31
申请号：US254183
申请日：1999-03-02
申请人： Akiko Kanda , Katsumasa Haikawa , Akihiro Yamanaka , Kenmi Narita , Junichi Yamashita , Junichi Koyama
发明人： Akiko Kanda , Katsumasa Haikawa , Akihiro Yamanaka , Kenmi Narita , Junichi Yamashita , Junichi Koyama
IPC分类号： G21C3/326 , G21C5/02
CPC分类号： G21C5/02 , G21C3/326 , Y02E30/38
摘要： Several unit loading patterns are arranged in the central area of an initial core to which the present invention is applied. The unit loading pattern is composed of one square-shaped unit cell and four cross-shaped control rods 3 which surround the unit cell. The unit cell is composed of one low enrichment fuel assembly 7, two high enrichment fuel assemblies 8 and one high enrichment fuel assembly 9. The low enrichment fuel assemblies 7 of each unit loading pattern adjoin each other and are arranged to constitute the first control cell 2a being square-shaped. The high enrichment fuel assemblies 9, obliquely adjoining the low enrichment fuel assembly 7 in each unit loading pattern, adjoin each other and are arranged to constitute the second control cell 2b being square-shaped. The high enrichment fuel assembly 9 constituting the unit loading pattern is divided into a control rod side area and an anticontrol rod side area by a diagonal line L1, and the number of Gd fuel rods in the control rod side area is 2 or more than the number in the anticontrol rod side area. By providing this structure, the increase of the local peaking factor on the control rod side can be suppressed and the thermal margin can be sufficiently secured, even if the control rod 3 of the second control cell 2b is extracted after the second operation cycle.
摘要翻译： PCT No.PCT / JP96 / 02501 Sec。 371日期1999年3月2日 102（e）1999年3月2日PCT PCT 1996年9月4日PCT公布。公开号WO98 / 10426 日期1998年3月12日几个单元加载模式布置在应用本发明的初始核心的中心区域中。单元加载模式由一个方形单位单元和围绕单位单元的四个十字形控制杆3组成。单元电池由一个低浓度燃料组件7，两个高浓缩燃料组件8和一个高浓缩燃料组件9组成。每个单元装载模式的低浓缩燃料组件7彼此邻接并且被布置成构成第一控制单元 2a为方形。在每个单元装载模式中与低浓缩燃料组件7倾斜相邻的高浓缩燃料组件9相互邻接并被布置成构成正方形的第二控制单元2b。构成单元装载图案的高浓缩燃料组件9通过对角线L1分为控制棒侧区域和反向推杆侧面区域，控制棒侧区域中的Gd燃料棒的数量为2个以上抗电极杆侧面的数量。通过提供这种结构，即使在第二操作周期之后提取第二控制单元2b的控制棒3，也可以抑制控制棒侧的局部峰值系数的增加，并且可以充分确保热裕度。

9. 发明授权

US5176877A Nuclear fuel assembly and nuclear reactor core containing said assembly 失效
标题翻译：核燃料组件和核反应堆核心含有组装
公开(公告)号：US5176877A
公开(公告)日：1993-01-05
申请号：US584745
申请日：1990-09-19
申请人： Akinobu Nakajima , Yasunori Bessho , Motoo Aoyama , Junichi Koyama , Hiromasa Hirakawa , Junichi Yamashita , Tatsuo Hayashi
发明人： Akinobu Nakajima , Yasunori Bessho , Motoo Aoyama , Junichi Koyama , Hiromasa Hirakawa , Junichi Yamashita , Tatsuo Hayashi
IPC分类号： G21C3/328 , G21C3/326
CPC分类号： G21C3/326 , G21Y2002/201 , G21Y2004/30 , Y02E30/38
摘要： A nuclear fuel assembly for a nuclear reactor has a plurality of vertically extending fuel rods arranged side by side in a square array and containing fissile material. The array has two adjacent first sides which are next to a control rod region of the core and two adjacent second sides which are next to a non-control rod region of the core. When the rods of the array as seen in horizontal cross section, excluding the rods lying on the diagonal line joining the opposite corners of the array at which the control rod region meets the non-control rod region, is divided into four regions which area: the rods in the row and column of said array adjoining said first sides;b: the rods lying between said region a and said diagonal line;c: the rods lying between said region d and said diagonal line,d: the rods in the row and column of said array adjoining said second sides and; over at east part of the height containing fissile material, the average concentration of fissile material per fuel rod is higher in said region b than said region c and by at least 5% and, among all said regions a, b, c, d, is a minimum in said region a. This provides good control rod worth and low local power peaking.

10. 发明授权

US5093070A Core loading strategy 失效
标题翻译：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。

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