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1. 发明授权

US06697450B2 Zirconium-alloy clad fuel rods containing metal oxide for mitigation of secondary hydriding 失效
标题翻译：包含金属氧化物的锆合金包覆燃料棒，用于缓解二次氢化
公开(公告)号：US06697450B2
公开(公告)日：2004-02-24
申请号：US10330282
申请日：2002-12-30
申请人： Swaminathan Vaidyanathan , John H. Davies , Steven B. Wisner
发明人： Swaminathan Vaidyanathan , John H. Davies , Steven B. Wisner
IPC分类号： G21C300
CPC分类号： G21C3/18 , G21C3/20 , G21Y2002/104 , G21Y2004/101 , Y02E30/40
摘要： Method of fabricating a fuel rod, comprising providing an effective amount of a metal oxide in the fuel rod to generate steam and mitigate the tendency for secondary hydriding. Fuel rods fabricated according to the method of the invention are also provided.
摘要翻译：制造燃料棒的方法，包括在燃料棒中提供有效量的金属氧化物以产生蒸汽并减轻二次氢化的倾向。还提供了根据本发明的方法制造的燃料棒。

2. 发明授权

US06643350B2 Fuel assembly 有权
公开(公告)号：US06643350B2
公开(公告)日：2003-11-04
申请号：US10112861
申请日：2002-04-02
申请人： Ryoji Masumi
发明人： Ryoji Masumi
IPC分类号： G21C300
CPC分类号： G21C3/32 , G21Y2002/201 , G21Y2004/30 , Y02E30/40
摘要： A fuel assembly attains high burnup and increases reactor shut-down margin when loaded into a reactor core wherein a water gap width on a control rod side and a water gap width on a side opposite to the control rod side are almost equal to each other. The fuel assembly has a plurality of fuel rods arranged in a square lattice pattern, each fuel rod being filled with nuclear fuel pellets and also has at least one neutron moderator rod shifted toward one corner where a control rod is inserted, away from a cross sectional center of the fuel assembly.

3. 发明授权

US06434210B1 Fuel assembly 有权
标题翻译：燃油组件
公开(公告)号：US06434210B1
公开(公告)日：2002-08-13
申请号：US09335694
申请日：1999-06-18
申请人： Ryoji Masumi
发明人： Ryoji Masumi
IPC分类号： G21C300
CPC分类号： G21C3/32 , G21Y2002/201 , G21Y2004/30 , Y02E30/40
摘要： A fuel assembly attains high burnup and increases reactor shut-down margin when loaded into a reactor core wherein a water gap width on a control rod side and a water gap width on a side opposite to the control rod side are almost equal to each other. The fuel assembly has a plurality of fuel rods arranged in a square lattice pattern, each fuel rod being filled with nuclear fuel pellets and also has at least one neutron moderator rod shifted toward one corner where a control rod is inserted, away from a cross sectional center of the fuel assembly.
摘要翻译：当装载到反应堆芯中时，燃料组件达到高燃耗并且增加了反应堆关闭余量，其中控制棒侧的水隙宽度和与控制棒侧相反的一侧上的水隙宽度几乎相等。燃料组件具有以正方形格子图案布置的多个燃料棒，每个燃料棒填充有核燃料颗粒，并且还具有至少一个中子减速器杆，该中子减速器杆向控制棒插入的一个角部移开，远离横截面燃料组件的中心。

4. 发明授权

US06542566B2 Cladding for use in nuclear reactors having improved resistance to stress corrosion cracking and corrosion 有权
标题翻译：用于核反应堆的包层具有改善的耐应力腐蚀开裂和腐蚀性能
公开(公告)号：US06542566B2
公开(公告)日：2003-04-01
申请号：US09801364
申请日：2001-03-07
申请人： Ronald Bert Adamson , Daniel Reese Lutz , Mickey Orville Marlowe , John Frederick Schardt , Cedric David Williams
发明人： Ronald Bert Adamson , Daniel Reese Lutz , Mickey Orville Marlowe , John Frederick Schardt , Cedric David Williams
IPC分类号： G21C300
CPC分类号： G21C3/20 , G21C3/07 , G21Y2002/103 , G21Y2002/104 , G21Y2004/10 , G21Y2004/20 , Y02E30/40
摘要： An improved fuel element for use in a nuclear reactor comprised of a central core of nuclear material, which is surrounded by a composite cladding. The cladding has an outer metallic tubular portion comprised of well-known cladding alloys used for such purposes. Metallurgically bonded to the outer metallic tubular portion is a commercially pure zirconium microalloyed with a controlled quantity of iron. The zirconium microalloyed with iron produced an inner metallic barrier having a beneficial balance between stress corrosion crack resistance and corrosion resistance while retaining other beneficial properties of pure zirconium, such as ductility.
摘要翻译：用于核反应堆的改进的燃料元件，其由核材料的中心核心组成，其被复合包层包围。包层具有由用于这些目的的众所周知的包层合金构成的外部金属管状部分。与外部金属管状部分冶金结合的是商业上纯的与受控量铁合金化的锆。与铁微合金的锆产生了内部金属屏障，其在应力腐蚀开裂性和耐腐蚀性之间具有有利的平衡，同时保留了纯锆的其它有益性质，例如延展性。

5. 发明授权

US06434209B1 Critical power enhancement system for a pressurized fuel channel type nuclear reactor using alignment of fuel bundle pairs 有权
标题翻译：用于燃料束对对准的加压燃料通道型核反应堆的临界功率增强系统
公开(公告)号：US06434209B1
公开(公告)日：2002-08-13
申请号：US09406141
申请日：1999-09-27
申请人： Dé C. Groeneveld , John R. Schenk , Rayman Sollychin
发明人： Dé C. Groeneveld , John R. Schenk , Rayman Sollychin
IPC分类号： G21C300
CPC分类号： G21C3/14 , G21Y2002/201 , G21Y2004/301 , G21Y2004/302 , G21Y2004/305 , Y02E30/40
摘要： A Critical Channel Power (CCP) enhancement system is provided for a pressurized fuel-channel-type water-cooled nuclear reactor of the type adapted to be refuelled on-line by the insertion and removal of fuel bundles onto and from of a plurality of said fuel channel assemblies, each of said fuel channel assemblies. A means is provided for interlocking fuel bundles into pairs having their fuel elements aligned, thereby lowering the hydraulic resistance in the fuel channel and enhancing CCP. The means for interlocking prevents misalignment of the paired bundles during their residence time inside the reactor due to continuous rocking and vibration of the fuel bundles exposed to very high coolant mass flow rate and misalignment due to axial separation of bundles impacting upon one another during fuelling operations.
摘要翻译：提供了一种用于通过将燃料束插入和从多个所述的多个所述的燃料束插入和从其中去除的在线加油的加压燃料通道型水冷核反应堆的关键通道功率（CCP）增强系统燃料通道组件，每个所述燃料通道组件。提供了一种用于将燃料束成对配合以将其燃料元件对准的装置，从而降低燃料通道中的液压阻力并增强CCP。用于联锁的装置防止了由于在加油操作期间由于在彼此撞击的束的轴向分离而暴露于非常高的冷却剂质量流率和不对准的燃料束的连续摇摆和振动，在反应器内的停留时间期间，成对的束的偏移不对准。

6. 发明授权

US06229868B1 Nuclear fuel assembly 失效
标题翻译：核燃料组件
公开(公告)号：US06229868B1
公开(公告)日：2001-05-08
申请号：US09202689
申请日：1999-02-10
申请人： Olov Nylund , Thorbjörn Sahlin
发明人： Olov Nylund , Thorbjörn Sahlin
IPC分类号： G21C300
CPC分类号： G21C3/3315 , G21C3/322 , G21C3/3305 , G21Y2002/20 , G21Y2004/302 , G21Y2004/402 , Y02E30/38
摘要： The present invention relates to a fuel assembly for a light-water nuclear reactor with a substantially square cross section which comprises fuel rods (4) extending between a bottom tie plate (16) and a top tie plate (17). A coolant is adapted, during operation, to flow upwards through the fuel assembly. According to one aspect of the invention, the fuel assembly comprises a plurality of fuel units (3) stacked on top of each other, wherein each fuel unit (3) comprises a plurality of fuel rods (4) extending between a top tie plate (17) and a bottom tie plate (16). The fuel units are arranged attached to a support structure (4a, 14, 14a, 14b) extending through the whole fuel assembly such that axial gaps are formed between the fuel units (3). One of the tie plates is freely movable relative to the support structure.
摘要翻译：本发明涉及一种具有基本正方形横截面的轻水核反应堆燃料组件，其包括在底板（16）和顶板（17）之间延伸的燃料棒（4）。在操作期间，冷却剂适于向上流过燃料组件。根据本发明的一个方面，燃料组件包括堆叠在彼此顶部的多个燃料单元（3），其中每个燃料单元（3）包括多个燃料棒（4），其在顶部连接板 17）和底板（16）。燃料单元被布置成附接到延伸穿过整个燃料组件的支撑结构（4a，14,14a，14b），使得在燃料单元（3）之间形成轴向间隙。一个连接板相对于支撑结构可自由移动。

7. 发明授权

US06738447B1 High energy absorption top nozzle for a nuclear fuel assembly 有权
标题翻译：用于核燃料组件的高能量吸收顶部喷嘴
公开(公告)号：US06738447B1
公开(公告)日：2004-05-18
申请号：US10444469
申请日：2003-05-22
申请人： James A. Sparrow , Yuriy Aleshin , Aleksey Slyeptsov
发明人： James A. Sparrow , Yuriy Aleshin , Aleksey Slyeptsov
IPC分类号： G21C300
CPC分类号： G21C3/3315 , G21C3/331 , G21C7/20 , G21Y2002/303 , G21Y2002/304 , G21Y2004/30 , Y02E30/39
摘要： A high energy absorption top nozzle for a nuclear fuel assembly that employs an elongated upper tubular housing and an elongated lower tubular housing slidable within the upper tubular housing. The upper and lower housings are biased away from each other by a plurality of longitudinally extending springs that are restrained by a longitudinally moveable piston whose upward travel is limited within the upper housing. The energy imparted to the nozzle by a control rod scram is mostly absorbed by the springs and the hydraulic affect of the piston within the nozzle.
摘要翻译：用于核燃料组件的高能量吸收顶部喷嘴，其采用细长的上部管状壳体和可在上部管状壳体内滑动的细长的下部管状壳体。上壳体和下壳体被多个纵向延伸的弹簧彼此远离，该弹簧由纵向可移动的活塞约束，其向上行程限制在上壳体内。通过控制杆冲击而施加到喷嘴的能量主要被弹簧吸收并且活塞在喷嘴内的液压影响。

8. 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。

9. 发明授权

US06470062B1 Nuclear fuel assembly 有权
标题翻译：核燃料组件
公开(公告)号：US06470062B1
公开(公告)日：2002-10-22
申请号：US09446635
申请日：2000-03-14
申请人： Olov Nylund
发明人： Olov Nylund
IPC分类号： G21C300
CPC分类号： G21C3/322 , G21Y2002/201 , G21Y2002/302 , G21Y2004/302 , G21Y2004/304 , Y02E30/31 , Y02E30/38
摘要： A fuel assembly for a boiling water reactor which is designed to allow water, during operation of the reactor, to flow upwards through the fuel assembly while absorbing heat from a plurality of fuel rods, whereby part of the water is transformed into steam. The fuel assembly comprises a first steam pipe (10a) arranged with its longitudinal axis parallel to the longitudinal axis of the fuel assembly and the steam pipe comprises an inlet for the steam arranged in the first end of the steam pipe and an outlet for the steam arranged in the second end of the steam pipe. The fuel assembly also comprises a second steam pipe (10b) arranged above and at a distance from the first steam pipe such that an opening is formed between the steam pipes. The outlet of the first steam pipe has a diameter which is larger than the diameter of the inlet of the second steam pipe.
摘要翻译：一种用于沸水反应器的燃料组件，其被设计成在反应器运行期间允许水向上流过燃料组件，同时从多个燃料棒吸收热量，由此部分水被转化为蒸汽。燃料组件包括第一蒸汽管道（10a），其布置成其纵向轴线平行于燃料组件的纵向轴线，并且蒸汽管道包括用于设置在蒸汽管道的第一端中的蒸汽的入口和用于蒸汽的出口布置在蒸汽管的第二端。燃料组件还包括布置在第一蒸汽管上方且距离第一蒸汽管一定距离处的第二蒸汽管（10b），使得在蒸汽管之间形成开口。第一蒸汽管的出口的直径大于第二蒸汽管的入口的直径。

10. 发明授权

US06445759B1 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：US06445759B1
公开(公告)日：2002-09-03
申请号：US09689789
申请日：2000-10-13
申请人： Kouji Hiraiwa , Yamato Hayashi , Yasushi Hirano , Jun Saeki , Kazuki Hida , Junko Watanabe
发明人： Kouji Hiraiwa , Yamato Hayashi , Yasushi Hirano , Jun Saeki , Kazuki Hida , Junko Watanabe
IPC分类号： G21C300
CPC分类号： G21C7/04 , G21C3/326 , G21Y2002/201 , G21Y2004/10 , G21Y2004/30 , Y02E30/38 , Y02E30/39
摘要： A fuel assembly comprises a plurality of fuel rods bundled in grid pattern, a part of the fuel rods containing gadolinium as a burnable poison. At least one of the fuel rod having gadolinium contains gadolinium enriched in at least one kind of isotope of odd mass number more than an isotopic abundance of natural gadolinium. In the enriched gadolinium, a ratio of a content of Gd-155 to that of Gd-157 is 0.1 or less. An average concentration (wt %) G0 of enriched gadolinia is, with M denoting the number of month under rated power operation per one cycle of an equilibrium core, P power density of a nuclear reactor (kw/l unit) and W a sum of isotopic composition, is set in the range shown by the following expression. G0
摘要翻译：燃料组件包括多个以栅格图案捆扎的燃料棒，燃料棒的一部分包含钆作为可燃毒物。具有钆的燃料棒中的至少一个含有富含至少一种比天然钆的同位素丰度高的奇数质量的至少一种同位素的钆。在富集的钆中，Gd-155与Gd-157的含有率为0.1以下。富氧钆的平均浓度（wt％）G0，M表示平衡核心每一个循环的额定功率运行下的月数，核反应堆的功率密度（kw / l单位）和W是同位素组成设定在由下式表示的范围内。因此，在燃料组件中，可以减少循环端的可燃毒物的残留反应性，并且可以提高热性能。在燃料组件的另一方面，a 设置在控制杆侧的区域中的钆氧燃料棒包含富含奇数质量数超过天然同位素丰度的同位素的钆。富集钆的浓度设定为例如天然钆的一半以下。因此，氧化钆燃料棒中的易裂变材料（铀）的富集可以大于现有的燃料组件中的裂变材料（铀）的浓缩，钚的平均浓度增加。

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