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    • 61. 发明授权
    • Bismuth compounds composite
    • 铋化合物复合
    • US08308986B1
    • 2012-11-13
    • US13524447
    • 2012-06-15
    • McCord Stuart
    • McCord Stuart
    • G21F1/08G21F1/10G21C7/24
    • G21F1/103G21Y2002/10G21Y2002/304G21Y2004/10
    • A heavily filled bismuth compound composite having a polymer matrix and a bismuth compound therein. The bismuth compound may be bismuth oxide, or other bismuth compounds. The polymer may be any of a very wide range of materials or combinations thereof. Binder, secondary fillers or other third components may be added. By means of use of various bismuth compounds, polymers, and third components, the physical, radiological and electrical properties of the finished products may be tailored to achieve desired properties. In addition, the invention teaches that radiation shielding, insulators, and combined radiation shield/insulators may be fashioned from the composite. A wide range of production methods may be employed, including but not limited to liquid resin casting.
    • 具有聚合物基质和铋化合物的重度填充的铋化合物复合物。 铋化合物可以是氧化铋或其他铋化合物。 聚合物可以是非常宽范围的材料或其组合中的任何一种。 可以添加粘合剂,二次填料或其它第三组分。 通过使用各种铋化合物,聚合物和第三组分,成品的物理,放射性和电学性质可以被调整以达到期望的性能。 另外,本发明教导了辐射屏蔽,绝缘体和组合辐射屏蔽/绝缘体可以从复合材料制成。 可以采用多种制备方法,包括但不限于液体树脂浇铸。
    • 63. 发明申请
    • SPENT FUEL STORAGE RACK
    • 燃油储存架
    • US20090207962A1
    • 2009-08-20
    • US12373059
    • 2008-02-12
    • Manabu Maeda
    • Manabu Maeda
    • G21C19/07
    • G21C19/07G21C19/40G21Y2002/10G21Y2002/201G21Y2002/302G21Y2004/30
    • A spent fuel storage rack 1 according to the present invention is installed in a fuel storage pool of a nuclear facility, and has a rectangular parallelepiped shape forming a plurality of lattice-like cells 2a that are configured to separately accommodate a plurality of fuel assemblies in a matrix of rows and columns. As shown in FIG. 1, the spent fuel storage rack 1 includes: a base 17 configured to support lower parts of fuel assemblies, the base 17 forming a bottom surface of the spent fuel storage rack 1; an outer frame 3 located above the base 17, the outer frame 3 forming an outermost periphery of the spent fuel storage rack 1; and a lattice body 2 disposed inside the outer frame 3, the lattice body 2 forming the lattice-like cells 2a. The lattice body 2 includes: a main lattice 4 having a height equivalent to an active length of the fuel assembly; an upper lattice 5 disposed above the main lattice 4 so as to be fitted to an upper end of the main lattice 4; and a lower lattice 6 disposed between the base 17 and the main lattice 4 so as to be fitted to a lower end of the main lattice 4. Thus, the main lattice 4 can be formed without welding, whereby the main lattice 4 can be made of a boron-added stainless steel to which a sufficient amount of boron is added to absorb neutrons.
    • 根据本发明的乏燃料储存架1安装在核设备的燃料储存池中,并且具有形成多个格子状电池2a的长方体形状,其构造成分别容纳多个燃料组件 行和列的矩阵。 如图所示。 如图1所示,废燃料储存架1包括:基部17,其构造成支撑燃料组件的下部,基部17形成废燃料存储架1的底面; 位于基座17上方的外框架3,外框架3形成废燃料储存架1的最外周; 以及设置在外框架3内的网格体2,形成格子状电池2a的格子体2。 格子体2包括:具有与燃料组件的有效长度相当的高度的主格子4; 上格栅5设置在主格子4的上方,以装配到主格子4的上端; 以及设置在基座17和主格子4之间以便与主格子4的下端嵌合的下格子6.因此,可以形成主格子4而不进行焊接,从而可以形成主格子4 的硼添加不锈钢,其中加入足够量的硼以吸收中子。
    • 69. 发明授权
    • Control rod drive mechanism
    • 控制杆驱动机构
    • US5793826A
    • 1998-08-11
    • US722765
    • 1996-09-27
    • Yoshifumi SatoNobuyuki TanakaYukio Watanabe
    • Yoshifumi SatoNobuyuki TanakaYukio Watanabe
    • G21C7/12H02K7/08H02K11/00H02K49/10
    • H02K49/106G21C7/12G21Y2002/10G21Y2002/302G21Y2002/303G21Y2002/40G21Y2004/30G21Y2004/301H02K11/00H02K7/08Y02E30/39
    • A control rod mechanism for transmitting the rotation of an electric motor via a drive shaft to an elevator apparatus for raising and lowering a hollow piston on an upper end thereof, which is provided a control rod that controls the output of a nuclear reactor. The control rod mechanism is used to insert the control rod into a reactor core or remove it therefrom, and also to rapidly insert the control rod into the reactor core by the injection of hot water to force the hollow piston upward. The control rod mechanism includes a magnetic coupling having an inner magnet, which is divided into a plurality of parts and is disposed at a lower portion of the drive shaft in order to transmit the rotational power of the electric motor to the drive shaft. The control rod mechanism also includes a drive-side outer magnet, which is divided into a plurality of parts and is provided on a rotary shaft of the electric motor in an arrangement on an outer side of the inner magnet. The control rod mechanism further includes a circular cylindrical outer yoke on an inner surface of which the outer magnet is mounted on. The radial-direction position of an outer magnet installation surface on the outer yoke is the same as or further inward with respect to the radial-direction position of an inner surface of the outer yoke that is above the outer magnet installation surface.
    • 一种控制杆机构,用于通过驱动轴将电动机的旋转传递到用于升高和降低其上端的中空活塞的电梯装置,该控制棒设置有控制核反应堆的输出的控制棒。 控制杆机构用于将控制棒插入反应堆芯或从其中移除,并通过注入热水将控制杆快速插入反应堆芯,以迫使中空活塞向上。 控制杆机构包括具有内部磁体的磁耦合器,该内部磁体被分成多个部分并且设置在驱动轴的下部,以将电动机的旋转动力传递到驱动轴。 控制杆机构还包括驱动侧外部磁体,该驱动侧外部磁体被分成多个部分,并且设置在电动机的旋转轴上,该内部磁体在外部的外侧。 控制杆机构还包括在外表面上安装外磁体的圆柱形外磁轭。 外磁轭的外磁铁安装面的径向位置相对于位于外磁铁安装面以上的外磁轭的内表面的径向位置相同或更靠内侧。
    • 70. 发明授权
    • Hafnium doped replacement rod for nuclear fuel reconstitution
    • 用于核燃料重组的铪掺杂替代棒
    • US5610959A
    • 1997-03-11
    • US364170
    • 1994-12-27
    • Mark W. FecteauJames W. Miller
    • Mark W. FecteauJames W. Miller
    • G21C3/326G21C3/335G21C7/06G21C19/19G21C3/00
    • G21C3/335G21C3/326G21C7/06G21Y2002/10G21Y2002/201G21Y2004/10G21Y2004/50Y02E30/38Y02E30/39
    • A replacement rod for insertion into a nuclear fuel assembly to replace a fuel rod containing a neutron absorbing, fissile fuel, includes Hafnium sufficient to substantially replace the neutron absorption capacity of the fuel rod. The replacement rod also includes a non-fissile second material that is commonly used for structures in nuclear fuel assemblies. The second material is preferably selected from the group consisting of a stainless steel, a zirconium alloy and zirconium. In one embodiment, the Hafnium is fabricated into a cylindrically-shaped rodlet, or core, and the second material is fabricated into an annulus around the core. Alternatively, the Hafnium and the second material are each distributed about uniformly throughout a cylindrical volume of the replacement rod. Refurbishing nuclear fuel assemblies by replacing damaged fuel rods with replacement rods according to the invention obtains an improved peaking factor over prior art methods.
    • 用于插入核燃料组件以替换含有中子吸收裂变燃料的燃料棒的替换杆包括足以基本上替代燃料棒的中子吸收能力的铪。 替代杆还包括通常用于核燃料组件中的结构的不易裂变的第二材料。 第二种材料优选选自不锈钢,锆合金和锆。 在一个实施方案中,将铪制成圆柱形的小棒或芯,并将第二材料制成围绕芯的环形空间。 或者,铪和第二材料各自均匀地分布在更换棒的整个圆柱体积中。 通过根据本发明用替换棒替换损坏的燃料棒来翻新核燃料组件获得了比现有技术方法更好的峰值因子。