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公开(公告)号：US20200234834A1
公开(公告)日：2020-07-23
申请号：US16731867
申请日：2019-12-31
摘要： A nuclear fuel assembly for a nuclear reactor core including at least one fuel cartridge having a lattice structure including an outer wall defining an interior volume, at least one flow channel extending through the interior volume of the lattice structure, at least one lattice site disposed in the interior of the lattice structure; and at least one fuel compact disposed within a corresponding one of the at least one lattice site. A cross-sectional shape of the at least one fuel compact is the same as a cross-sectional shape of the corresponding one of the at least one lattice site.
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2.发明申请公开(公告)号：US20180090233A1
公开(公告)日：2018-03-29
申请号：US15715936
申请日：2017-09-26
发明人： Kouji HIRAIWA , Rei Kimura , Shungo Sakurai , Rie Aizawa , Goro Yanase , Shinichiro Kawamura
摘要： Light water reactor fuel assemblies each comprises: light water reactor fuel rods that extend longitudinally, contain nuclear fuel materials including enriched uranium, and are arranged parallel to each other; and burnable poison containing fuel rods that extend longitudinally, contain nuclear fuel materials whose main component is uranium that is lower in enrichment than the enriched uranium of the light water reactor fuel rods, and burnable poison, and are arranged in a lattice pattern together with the light water reactor fuel rods. The assemblies are arranged parallel to each other and in a lattice pattern. An initial value of a first enrichment of the enriched uranium is set in such a way that the first enrichment of the enriched uranium at an end of each operation cycle is greater than a predetermined value.
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公开(公告)号：US20170221590A1
公开(公告)日：2017-08-03
申请号：US15518920
申请日：2015-10-12
申请人： THOR ENERGY AS
CPC分类号： G21C3/328 , G21C3/045 , G21C3/16 , G21C3/326 , G21C3/58 , G21C3/623 , G21C7/005 , G21C7/06 , Y02E30/31 , Y02E30/38 , Y02E30/39
摘要： The present invention concerns a fuel assembly for a nuclear power boiling water reactor. The fuel assembly comprises fuel rods. At least 95% of the fuel rods comprise nuclear fuel material in the form of U enriched in 235U. At least 20% of the fuel rods belong to a first set of fuel rods. The fuel rods in this first set comprise both U enriched in 235U and Th. The first set comprises a first and a second subset of fuel rods. The ratio, with regard to weight, between Th and U, in each fuel rod of said first subset, is higher than the ratio, with regard to weight, between Th and U, in each fuel rod of said second subset. The invention also concerns a nuclear power boiling water reactor and a manner of operating such a reactor.
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公开(公告)号：US09646725B2
公开(公告)日：2017-05-09
申请号：US13389246
申请日：2010-07-21
申请人： Dorothee Henras , Song Hui Zheng
发明人： Dorothee Henras , Song Hui Zheng
摘要： A method is provided for operating a nuclear reactor. The method includes operating the nuclear reactor for at least one plutonium equilibrium cycle during which the core contains plutonium-equilibrium nuclear fuel assemblies; subsequently, operating the reactor for transition cycles, at least some of the plutonium-equilibrium nuclear fuel assemblies being progressively replaced with transition nuclear fuel assemblies and then with uranium-equilibrium nuclear fuel assemblies; and then operating the nuclear reactor for at least one uranium equilibrium cycle.
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5.发明申请NUCLEAR FUEL CONTAINING RECYCLED AND DEPLETED URANIUM, AND NUCLEAR FUEL BUNDLE AND NUCLEAR REACTOR COMPRISING SAME 审中-公开包含回收和分离的铀的核燃料和包含相同的核燃料组件和核反应堆公开(公告)号：US20130308741A1
公开(公告)日：2013-11-21
申请号：US13885582
申请日：2010-11-15
摘要： Fuel bundles for a nuclear reactor are described and illustrated, and in some cases includes fuel elements each having a first fuel component of recycled uranium; and a second fuel component of at least one of depleted uranium and natural uranium blended with the first fuel component, wherein the blended first and second fuel components have a first fissile content of less than 1.2 wt % of 235U. Other fuel bundles are also described and illustrated, and include a first fuel element including recycled uranium, the first fuel element having a first fissile content of no less than 0.72 wt % of 235U; and a second fuel element including at least one of depleted uranium and natural uranium, the second fuel element having a second fissile content of no greater than 0.71 wt % of 235U.
摘要翻译： 描述和说明了用于核反应堆的燃料束，并且在一些情况下包括各自具有再循环铀的第一燃料成分的燃料元件; 以及与所述第一燃料组分混合的贫化铀和天然铀中的至少一种的第二燃料组分，其中所述混合的第一和第二燃料组分的第一裂变含量小于235U的1.2wt％。 还描述和示出了其它燃料束，并且包括包括再循环铀的第一燃料元件，第一燃料元件具有不小于235U的0.72wt％的第一裂变含量; 以及包括贫化铀和天然铀中的至少一种的第二燃料元件，所述第二燃料元件的第二可裂变含量不大于235U的0.71wt％。
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公开(公告)号：US06925138B2
公开(公告)日：2005-08-02
申请号：US09978308
申请日：2001-10-17
申请人： Mikihide Nakamaru , Hideaki Heki , Takehiko Saito , Kouji Hiraiwa , Tadashi Narabayashi , Satoru Oomizu , Tsuyoshi Shimoda , Kenji Arai , Shinichi Morooka , Seijiro Suzuki
发明人： Mikihide Nakamaru , Hideaki Heki , Takehiko Saito , Kouji Hiraiwa , Tadashi Narabayashi , Satoru Oomizu , Tsuyoshi Shimoda , Kenji Arai , Shinichi Morooka , Seijiro Suzuki
IPC分类号： G21C1/08 , G21C3/328 , G21C5/00 , G21C7/04 , G21C7/113 , G21C7/14 , G21C7/24 , G21C7/27 , G21C1/04
CPC分类号： G21C5/00 , G21C1/084 , G21C7/04 , G21C7/113 , G21Y2002/201 , G21Y2002/304 , G21Y2002/40 , G21Y2004/30 , Y02E30/31 , Y02E30/39
摘要： The present invention is to provide a reactor core that allows a nuclear plant to continuously operate for a long term period, for example 15 years or longer, without requiring any fuel exchange, reduces the duration and number of maintenance steps involved in regular plant inspections, markedly improves plant availability and economic efficiency, and is effective in terms of nuclear nonproliferation.A plurality of fuel assemblies 103, themselves obtained by arranging fuel rods 100 and water rods 107 in square lattices, are arranged in a square lattice at a certain pitch. The blades 102a of a cross-shaped (cruciform) control rod 102 in a cross section are inserted into four adjacent spaces formed by four fuel assemblies 100 facing each other. A value of 0.06 cm−1 or greater is selected for the ratio (B/S) of the width (B) of each blade on the cruciform control rod 102 and the surface (S) of the fuel lattice defined by the surface area of a square whose side is equal to the pitch between the fuel assemblies 103.
摘要翻译： 本发明提供一种反应堆堆芯，其允许核电厂连续运行长达15年或更长的时间，而不需要任何燃料更换，减少常规工厂检查所涉及的维护步骤的持续时间和数量， 显着提高了植物的可利用性和经济效益，在核不扩散方面有效。 通过将燃料棒100和水杆107排列成方形格子而获得的多个燃料组件103以一定的间距排列成方格。 十字形（十字形）控制杆102的横截面的叶片102a插入由彼此面对的四个燃料组件100形成的四个相邻的空间中。 对于十字形控制杆102上的每个叶片的宽度（B）和燃料表面（S）的比（B / S），选择0.06cm -1以上的值 其方格由侧面等于燃料组件103之间的间距的正方形的面积限定。
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公开(公告)号：US20050129166A1
公开(公告)日：2005-06-16
申请号：US11024147
申请日：2004-12-28
申请人： Jurgen Stabel , Udo Borsdorf , Hans-Peter Hubsch
发明人： Jurgen Stabel , Udo Borsdorf , Hans-Peter Hubsch
CPC分类号： G21C3/32 , G21C3/328 , G21Y2002/104 , G21Y2002/303 , G21Y2004/30 , Y02E30/32 , Y02E30/38
摘要： A fuel element for a pressurized water reactor has fuel rods guided through a number of axially spaced spacers. The spacers form a square grid with a multitude of mesh openings arranged in rows and columns. Support tubes that do not contain fuel are passed through a number of the mesh holes and are joined with a material bond to the meshes inside the spacer. The support tubes are spread out in positions within the grid in such a manner that, with a predetermined number of support tubes and a distribution thereof within the grid, which is rotationally symmetric about 90° with regard to a rotation about the central axis of the spacer, said central axis being perpendicular to the grid plane, the number of rows and columns that do not contain any support tubes is minimal. In addition, it is ensured that optionally remaining inner rows and columns that do not contain any support tubes are not situated next to one another.
摘要翻译： 用于压水反应堆的燃料元件具有引导通过多个轴向间隔的间隔件的燃料棒。 间隔物形成具有排列成行和列的多个网格开口的正方形网格。 不含燃料的支撑管通过多个网孔，并且与材料结合在间隔物内部的网孔上。 支撑管以网格内的位置展开，使得预定数量的支撑管及其在网格内的分布相对于围绕中心轴的旋转约90°旋转对称 间隔物，所述中心轴垂直于网格平面，不包含任何支撑管的行数和列数是最小的。 此外，确保不包含任何支撑管的任选的剩余内部行和列不彼此相邻。
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公开(公告)号：US6275557B2
公开(公告)日：2001-08-14
申请号：US20249699
申请日：1999-02-11
申请人： ASEA ATOM AB
发明人： NYLUND OLOV , FREDIN BO , HELMERSSON STURE
CPC分类号： G21C3/328 , G21C3/18 , G21Y2002/207 , G21Y2004/305 , Y02E30/38
摘要： The present invention relates to a fuel assembly with a substantially square cross section for a light-water reactor. The light-water reactor comprises a plurality of fuel rods (4) extending between a top tie plate (5) and a bottom tie plate (6). A fuel rod (4) comprises a cladding tube (7a) with a first and a second end which surround a column with fissionable material (7b). According to one aspect of the invention, at least one fuel rod (4) is provided with an axial gap (19) in the fissionable material (7b), such that fissionable material (7b) is arranged on both sides of the axial gap (19) in the fuel rod (4).
摘要翻译： 本发明涉及一种具有用于轻水反应器的基本正方形横截面的燃料组件。 轻水反应器包括在顶部连接板（5）和底部连接板（6）之间延伸的多个燃料棒（4）。 燃料棒（4）包括具有第一和第二端的包层管（7a），所述第一和第二端围绕具有可裂变材料（7b）的柱。 根据本发明的一个方面，至少一个燃料棒（4）在可裂变材料（7b）中设置有轴向间隙（19），使得可裂变材料（7b）布置在轴向间隙的两侧 19）在燃料棒（4）中。
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9.发明授权Reactor core for a light water cooled reactor, fuel assembly and control rod 失效反应堆核心为轻水冷却反应堆，燃料组件和控制棒
公开(公告)号：US5940461A
公开(公告)日：1999-08-17
申请号：US70246
申请日：1998-05-01
申请人： Renzo Takeda , Motoo Aoyama , Masanao Moriwaki
发明人： Renzo Takeda , Motoo Aoyama , Masanao Moriwaki
IPC分类号： G21C5/20 , G21C1/00 , G21C1/08 , G21C3/00 , G21C3/328 , G21C3/62 , G21C7/10 , G21C7/113 , G21C7/117 , G21C1/04
CPC分类号： G21C1/084 , G21C1/00 , G21C3/00 , G21C7/113 , G21Y2002/201 , G21Y2002/601 , G21Y2004/101 , G21Y2004/30 , G21Y2004/60 , Y02E30/31 , Y02E30/39
摘要： To provide a reactor core for light water cooled reactor, a fuel assembly and a control rod intended for Pu multi-recycling at a breeding ratio of about 1.0, or 1.0 or more while keeping the economical or safety performance to the same level as in BWR now under operation, that is, while minimizing the change for the incore structures and maintaining the void coefficient negative. A reactor core for a light water cooled reactor having an effective fuel-to-water volume ratio of 0.1 to 0.6 by the combination of a dense lattice fuel assembly constituted of fuel rods formed by adding Pu to degraded uranium, natural uranium, depleted uranium or low concentrated uranium, coolants at high void fraction of 45% to 70% and a cluster-type, Y-type or cruciform control rod.
摘要翻译： 为了提供轻水冷却反应堆的反应堆堆芯，燃料组件和控制棒，用于以约1.0或1.0或更多的育种比率进行Pu多重循环，同时将经济或安全性能保持在与BWR相同的水平 现在正在运行，即尽可能减少腋窝结构的变化并保持空白系数为负。 一种用于轻水冷却反应器的反应堆堆芯，其由燃料棒组合而成的密集晶格燃料组合组合，其有效燃料与水的体积比为0.1至0.6，所述燃料棒通过将Pu添加到退化的铀，天然铀，贫化铀或 低浓度铀，高孔隙率为45％至70％的冷却剂和簇型Y型或十字形控制棒。
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公开(公告)号：US5544211A
公开(公告)日：1996-08-06
申请号：US321618
申请日：1994-10-12
CPC分类号： G21C3/326 , G21Y2002/201 , G21Y2004/30 , Y02E30/38
摘要： A fuel assembly has part length and full length fuel rods, and a pair of large-diameter water rods which occupy an area which can accommodate 7 fuel rods. Natural uranium regions are provided in the upper and lower end portions of the effective fuel zone of the fuel assembly. An intermediate region between these upper and lower natural uranium regions provides an enriched uranium region which has three axial sections: an upper section, a middle section and a lower section. The middle section has the highest average enrichment, the lower section has the medium average enrichment and the upper section has the smallest average enrichment. The difference in the average enrichment between the middle section and the lower section is smaller than that between the middle section and the upper section. The upper section has a lower concentration of burnable poison than other sections of the enriched uranium region. According to this arrangement, a greater burn-up degree of the fuel assembly can be achieved with minimal increment of the average enrichment, while preserving sufficiently large safety margin such as the thermal margin of the reactor and the reactor cold shut down margin.
摘要翻译： 燃料组件具有部件长度和全长燃料棒，以及一对大直径水棒，其占据可容纳7个燃料棒的区域。 天然铀区设置在燃料组件的有效燃料区的上端部和下端部。 这些上部和下部天然铀区域之间的中间区域提供了具有三个轴向部分的浓缩铀区域：上部分，中间部分和下部分。 中段平均浓度最高，下段中等浓度富集，上段平均浓度最小。 中段与下段之间的平均富集差异小于中段与上段之间的平均浓度差。 上段与浓缩铀区其他部分的可燃毒物浓度较低。 根据这种布置，燃料组件的燃烧程度可以以平均富集的最小增量实现，同时保持足够大的安全裕度，例如反应堆的热裕度和反应堆的冷关闭余量。
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