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    Reactor core for a light water cooled reactor, fuel assembly and control rod
    1.
    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。

    Fuel assembly
    3.
    发明授权
    Fuel assembly 失效
    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.

    Light water reactor core and fuel assembly
    6.
    发明授权
    Light water reactor core and fuel assembly 有权
    轻水反应堆核心和燃料组件

    公开(公告)号：US06512805B1

    公开(公告)日：2003-01-28

    申请号：US09660356

    申请日：2000-09-12

    申请人： Renzo Takeda ,  Motoo Aoyama ,  Junichi Miwa ,  Motohiko Ikegawa

    发明人： Renzo Takeda ,  Motoo Aoyama ,  Junichi Miwa ,  Motohiko Ikegawa

    IPC分类号： G21C104

    CPC分类号： G21C3/32 ,  G21C1/08 ,  G21C3/326 ,  G21C5/02 ,  G21C7/117 ,  Y02E30/31 ,  Y02E30/38

    摘要： There are provided a light water reactor core which has the same levels in cost efficiency and degree of safety as those of an existing BWR under operation now, that is, which is oriented to plutonium multi-recycle having a breeding ratio near 1.0 or slightly larger and having a negative void coefficient with minimizing modification of the reactor core structure of the existing BWR under operation now, and to fuel assemblies used for the boiling water reactor. The light water reactor core having an effective water-to-fuel volume ratio of 0.1 to 0.6 is formed by combining closed compact lattice fuel assemblies each composed of fuel rods having fuel which is enriched by adding plutonium or plutonium and an actinide to a uranium containing at least one of a depleted uranium, natural uranium, a degraded uranium and a low enriched uranium; high void fraction coolant of 45% to 70%; and large-diameter control rods to be inserted into the fuel assemblies, the large-diameter control rod comprising at least one absorption rod having a transverse cross-sectional area larger than a cross-sectional area of a unit lattice cell of the fuel rod.

    摘要翻译： 提供了一种轻水反应堆核心，其成本效益和安全程度与目前运行的现有BWR相同，即面向钚多循环的育种率接近1.0或稍大 并且具有负空隙系数，同时使现有的BWR的反应堆堆芯结构的现有修改最小化，以及用于沸水反应器的燃料组件。 具有有效的水与燃料体积比为0.1至0.6的轻水反应堆核心是通过组合封闭的紧凑格子燃料组合而形成的，每个燃料组合物由具有通过将钚或钚加入的铀和锕系元素富集的燃料的燃料棒组成， 铀，天然铀，退化铀和低浓铀中的至少一种; 45％至70％的高空隙率冷却液; 和大直径控制杆插入到燃料组件中，所述大直径控制杆包括至少一个吸收杆，所述至少一个吸收杆的横截面面积大于所述燃料棒的单元晶格单元的横截面面积。

    Fuel assembly and reactor core
    7.
    发明授权
    Fuel assembly and reactor core 失效
    燃料组件和反应堆堆芯

    公开(公告)号：US4871510A

    公开(公告)日：1989-10-03

    申请号：US178902

    申请日：1988-04-07

    申请人： Motoo Aoyama ,  Renzo Takeda

    发明人： Motoo Aoyama ,  Renzo Takeda

    IPC分类号： G21C3/328 ,  G21C3/322 ,  G21C3/324

    CPC分类号： G21C3/324 ,  G21C3/322 ,  Y02E30/38

    摘要： A fuel assembly of the present invention comprises fuel rods which are arranged in 9 rows and 9 columns (9.times.9) in a channel box. The channel box has a width L between outer walls thereof and a width D between inner walls thereof, both of which satisfy the following equation:0.12.ltoreq.(P-L)/Dwherein P denotes the fuel assembly pitch in a reactor core. A sufficient cold shutdown margin for a reactor core can be secured by determining the widths L and D so as to satisfy the above-described equation, even if the average enrichment of the fuel assembly is increased to 4 wt % or more.

    摘要翻译： 本发明的燃料组件包括在通道箱中布置成9列和9列（9x9）的燃料棒。 通道箱在其外壁之间具有宽度L和其内壁之间的宽度D，两者都满足以下等式：0.12 <=（P-L）/ D其中P表示反应堆芯中的燃料组件间距。 即使燃料组件的平均富集度提高到4重量％以上，也可以通过确定宽度L和D以满足上述等式来确保反应堆堆芯的足够的冷关闭裕度。

    Light water moderation type nuclear reactor
    8.
    发明授权
    Light water moderation type nuclear reactor 失效
    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。