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1. 发明授权

US4683113A Nuclear fuel assembly 失效
标题翻译：核燃料组件
公开(公告)号：US4683113A
公开(公告)日：1987-07-28
申请号：US734604
申请日：1985-05-16
申请人： Takaaki Mochida , Junichi Yamashita , Toshiro Yoshioka , Michihiro Ozawa
发明人： Takaaki Mochida , Junichi Yamashita , Toshiro Yoshioka , Michihiro Ozawa
IPC分类号： G21C3/18 , G21C3/328 , G21C3/00
CPC分类号： G21C3/18 , G21C3/328 , Y02E30/38
摘要： A nuclear fuel assembly has a plurality of fuel rods each containing a multiplicity of fuel pellets. The fuel rods include a plurality of first fuel rods and a plurality of second fuel rods. Each of the first fuel rods contains a burnable poison over substantially the entire axial length thereof. The first fuel rod also has a greater means enrichment in the upper axial region thereof than that in the lower axial region thereof. Each of the second fuel rods contains no burnable poison and has a uniform enrichment distribution over substantially the entire axial length thereof. In each cross-section of the fuel assembly perpendicular to the axis thereof, the outer peripheral portion has a greater mean enrichment than the central portion. The first fuel rods are disposed in the peripheral portion except the outermost peripheral portion of the cross-section of the fuel assembly.
摘要翻译：核燃料组件具有多个燃料棒，每个燃料棒包含多个燃料粒子。燃料棒包括多个第一燃料棒和多个第二燃料棒。每个第一燃料棒在其基本上的整个轴向长度上包含可燃的毒物。第一燃料棒在其上轴向区域中具有比在其下轴向区域更大的装置富集。每个第二燃料棒不含有可燃毒物并且在其基本上整个轴向长度上具有均匀的富集分布。在垂直于其轴线的燃料组件的每个横截面中，外周部分具有比中心部分更大的平均富集度。第一燃料棒设置在除了燃料组件的横截面的最外周部分之外的周边部分中。

2. 发明授权

US4777016A Fuel assembly 失效
标题翻译：燃油组件
公开(公告)号：US4777016A
公开(公告)日：1988-10-11
申请号：US870400
申请日：1986-06-04
申请人： Toshiro Yoshioka , Takao Igarashi , Takaaki Mochida , Michihiro Ozawa
发明人： Toshiro Yoshioka , Takao Igarashi , Takaaki Mochida , Michihiro Ozawa
IPC分类号： G21C3/326 , G21C3/322 , G21C3/32
CPC分类号： G21C3/322 , G21C2003/3225 , G21Y2002/201 , G21Y2004/30 , Y02E30/38 , Y10S376/904
摘要： A fuel assembly including a channel box, upper and lower tie plates, fuel rods inserted in the channel box and held at upper and lower end portions by the upper and lower tie plates, a water rod disposed among the fuel rods and spacers for keeping the fuel rods and the water rod spaced from one another. The water rod has a diameter larger than that of each of the fuel rods and the upper end of the water rod has a height substantially as high as an upper end of an effective enriched fuel section of each fuel rod.
摘要翻译：一种燃料组件，包括通道箱，上下连接板，插入通道箱中的燃料棒，并通过上下连接板保持在上端和下端部，设置在燃料棒和间隔件之间的水杆，用于保持燃料棒和水杆彼此间隔开。水杆的直径大于每个燃料棒的直径，并且水杆的上端具有与每个燃料棒的有效富集燃料部分的上端大致相同的高度。

3. 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。

4. 发明授权

US5128097A Reactor core, fuel assembly and fuel spacer 失效
标题翻译：反应堆核心，燃料组件和燃料间隔
公开(公告)号：US5128097A
公开(公告)日：1992-07-07
申请号：US449916
申请日：1989-12-14
申请人： Yukihisa Fukasawa , Akira Nishimura , Junichi Yamashita , Michihiro Ozawa
发明人： Yukihisa Fukasawa , Akira Nishimura , Junichi Yamashita , Michihiro Ozawa
IPC分类号： G21C3/328 , G21C3/344 , G21C5/02 , G21C5/12
CPC分类号： G21C3/344 , G21C3/328 , G21C5/02 , Y02E30/38
摘要： Herein disclosed is a reactor core including a plurality of fuel assemblies having a plurality of fuel rods. In a central region of the transverse section of the fuel assembly, a plurality of fuel rods are arranged in the form of a square lattice. In the peripheral region surrounding the central region, a plurality of fuel rods are arranged in the form of triangular lattice. The pitch of the fuel rods arranged in the square lattice form is equal to that of the fuel rods arranged in the triangular lattice form. With the arrangement of the fuel rods in the triangular lattice form in the peripheral region, the ratio of the moderator to the fuel of the peripheral region is smaller than that of the central region. As a result, the local power peaking drops. Since the arrangement of the fuel rods is partially in the triangular lattice form, the pitch of the fuel rods can be increased to augment the MCPR.
摘要翻译： PCT No.PCT / JP89 / 00582 Sec。 371日期1989年12月14日第 102（e）1989年12月14日的PCT日期1989年6月7日PCT。此外，公开了一种反应堆堆芯，其包括具有多个燃料棒的多个燃料组件。在燃料组件的横截面的中心区域中，多个燃料棒以正方形格子的形式布置。在围绕中心区域的周边区域中，多个燃料棒以三角形晶格的形式布置。以正方形格子形式布置的燃料棒的螺距等于以三角格子形式布置的燃料棒的螺距。由于周边区域中的三角格子形式的燃料棒的配置，周边区域的调节剂与燃料的比例小于中央区域的比例。结果，当地的电力峰值下降。由于燃料棒的布置部分是三角形格子形状，所以可以增加燃料棒的间距以增加MCPR。

5. 发明授权

US5008070A Fuel assembly 失效
标题翻译：燃油组件
公开(公告)号：US5008070A
公开(公告)日：1991-04-16
申请号：US268595
申请日：1988-11-07
申请人： Motoo Aoyama , Junichi Koyama , Sadao Uchikawa , Yasunori Bessho , Michihiro Ozawa , Mitsunari Nakamura , Akinobu Nakajima , Hiromi Maruyama
发明人： Motoo Aoyama , Junichi Koyama , Sadao Uchikawa , Yasunori Bessho , Michihiro Ozawa , Mitsunari Nakamura , Akinobu Nakajima , Hiromi Maruyama
IPC分类号： G21C3/326
CPC分类号： G21C3/326 , G21Y2002/201 , G21Y2004/30 , Y02E30/38
摘要： A fuel assembly has a plurality of first fuel rods each of which contains nuclear fuel material but does not contain burnable poison, and a plurality of second fuel rods each of which includes nuclear fuel material and burnable poison. The amount of burnable poison in a lower region of the fuel assembly is smaller than that in an upper region thereof. When each of the second fuel rods is divided into an upper region and a lower region, a region of the divided regions in the second fuel rods containing a maximum burnable poison concentration Gmax and a region of the divided regions in the second fuel rods containing a minimum burnable poison concentration Gmin are located in the lower region of the fuel assembly. The burnable poison concentration of the upper region of each second fuel rod is between Gmax and Gmin. The fuel assembly may moderate a maximum linear heat rating with an increased spectral shift effect.

6. 发明授权

US4567018A Core construction of nuclear reactor 失效
标题翻译：核反应堆核心建设
公开(公告)号：US4567018A
公开(公告)日：1986-01-28
申请号：US704149
申请日：1985-02-22
申请人： Masaki Enomoto , Michihiro Ozawa
发明人： Masaki Enomoto , Michihiro Ozawa
IPC分类号： G21C3/328 , G21C5/00 , G21C19/20 , G21C3/32
CPC分类号： G21C19/205 , G21C3/328 , G21C5/00 , Y02E30/38
摘要： A core construction of a nuclear reactor wherein the fuel charge in the core has 1/4 symmetry and fuel assemblies adjacent a control rod (10) constitute a core unit. In the central portion of the core, each core unit (12) is composed of one thrice burned fuel assembly (3), and three once (1) or twice (2) burned fuel assemblies. One of the two types of fuel assemblies which includes two fuel assemblies located on a diagonal line in the respective core unit. In the core as a whole, the fuel assemblies of the same type or the same burning cyclic period are located on a diagonal line (E,F,G).
摘要翻译：核反应堆的核心结构，其中核心中的燃料装料具有1/4对称性，并且邻近控制杆（10）的燃料组件构成核心单元。在核心的中心部分，每个核心单元（12）由一个三重燃烧的燃料组件（3）和三个一个（1）或两个（2）燃烧的燃料组件组成。两种类型的燃料组件中的一种，其包括位于相应芯单元中的对角线上的两个燃料组件。在整体的核心中，相同类型或相同燃烧循环周期的燃料组件位于对角线（E，F，G）上。

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