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    Control rod for boiling water reactor and method for manufacturing the same
    1.
    发明授权
    Control rod for boiling water reactor and method for manufacturing the same 有权
    沸水反应堆控制棒及其制造方法

    公开(公告)号：US06735266B1

    公开(公告)日：2004-05-11

    申请号：US10274040

    申请日：2002-10-21

    申请人： Michio Nakayama ,  Takehiro Seto ,  Noriaki Goto ,  Shouji Adachi

    发明人： Michio Nakayama ,  Takehiro Seto ,  Noriaki Goto ,  Shouji Adachi

    IPC分类号： G21C710

    CPC分类号： G21C7/113 ,  B23K26/24 ,  B23K26/32 ,  B23K33/00 ,  B23K2103/05 ,  B23K2103/50 ,  G21C21/00 ,  G21C21/18 ,  G21Y2002/204 ,  G21Y2002/30 ,  Y02E30/31 ,  Y02E30/39

    摘要： A tie rod having a cruciform cross section is provided with steps for fixing sheaths at tips of cruciform arms of the tie rod; the tips of each of sheaths are fitted onto the steps of the tie rod, each of the sheaths having a U-shaped cross section; and each of the sheaths is fixed to the tie rod by performing a laser welding using a YAG (yttrium aluminum garnet) laser beam or a CO2 laser beam with the sheath being fitted onto the tie rod to achieve a continuous weld of at least a part of the tie rod in a longitudinal direction thereof. An axial center position of the beam is shifted from an end face position of the step of the tie rod at least toward an axis center of the tie rod.

    摘要翻译： 具有十字形横截面的拉杆设置有用于在拉杆的十字形臂的尖端固定护套的台阶; 每个护套的尖端装配在拉杆的台阶上，每个护套具有U形横截面; 并且每个护套通过使用YAG（钇铝石榴石）激光束或CO 2激光束进行激光焊接而固定到拉杆，其中护套被安装在拉杆上以实现至少一部分的连续焊接 拉杆的长度方向。 梁的轴向中心位置至少朝向拉杆的轴心中心从衔铁的台阶的端面位置偏移。

    Guide tube of a nuclear reactor fuel assembly
    4.
    发明授权
    Guide tube of a nuclear reactor fuel assembly 有权
    导管的核反应堆燃料组件

    公开(公告)号：US06411668B1

    公开(公告)日：2002-06-25

    申请号：US09348544

    申请日：1999-07-07

    申请人： Jean Drillon ,  Jean-Luc Aubin

    发明人： Jean Drillon ,  Jean-Luc Aubin

    IPC分类号： G21C710

    CPC分类号： B21B21/005 ,  B21B25/00 ,  B21B2015/0014 ,  G21C7/20 ,  G21C21/00 ,  G21Y2002/204 ,  G21Y2002/206 ,  G21Y2002/303 ,  G21Y2004/30 ,  G21Y2004/501 ,  Y02E30/39

    摘要： A tubular blank (22) is rolled on a mandrel (14) in a pilgrim rolling mill. In a first rolling stage, a first part of the blank (22) is rolled on a first part (18, 19) of the mandrel (14), with a reduction of the outside diameter of the blank (22) to the outside diameter of the guide tube and a reduction of the wall thickness of the blank (22) to one of a first wall thickness (e1) and a second wall thickness (e2) exceeding the first wall thickness (e1). The mandrel (14) is advanced in the axial direction. A second part of the blank (22) is rolled on a second part (20,21) of the mandrel spaced from the first part in the axial direction with a reduction of the outside diameter of the blank to the outside diameter of the guide tube and a reduction of the wall thickness of the blank (22) to the other of the first wall thickness (e1) and second wall thickness (e2).

    摘要翻译： 管状坯料（22）在朝圣者轧机的心轴（14）上滚动。 在第一滚动阶段中，坯料（22）的第一部分在心轴（14）的第一部分（18,19）上滚动，坯料（22）的外径减小到外径 和将坯料（22）的壁厚减小到超过第一壁厚（e1）的第一壁厚（e1）和第二壁厚（e2）中的一个。 心轴（14）沿轴向前进。 坯料（22）的第二部分在芯轴的第二部分（20,21）上滚动，心轴的第二部分（20,21）与第一部分沿轴向间隔开，同时坯料的外径减小到导管的外径 以及将坯料（22）的壁厚减小到第一壁厚（e1）和第二壁厚（e2）中的另一个。

    Control rod for nuclear reactor
    6.
    发明授权
    Control rod for nuclear reactor 失效
    核反应堆控制棒

    公开(公告)号：US06470061B1

    公开(公告)日：2002-10-22

    申请号：US08617894

    申请日：1996-03-19

    申请人： Sture Helmersson

    发明人： Sture Helmersson

    IPC分类号： G21C710

    CPC分类号： G21C7/113 ,  G21C7/11 ,  G21Y2002/201 ,  G21Y2004/30 ,  Y02E30/31 ,  Y02E30/39

    摘要： The invention relates to a control rod for a boiling water reactor. The control rod comprises a top piece and a bottom piece between which an absorber part is arranged. The absorber part comprises a central part (4) and four absorber blades (3) extending from the central part (4). The absorber part comprises a channel (10) which comprises the central part and which extends along the length of the whole absorber part. The channel is surrounded by walls of a neutron-absorbing material with a long service life, for example hafnium. The channel is at least partially filled with a moderator, for example light water. During the manufacture the absorber part has undergone a heat treatment such that the hafnium alloy has been completely or partially transformed from &agr;-phase to &bgr;-phase and thereafter been rapidly cooled to &agr;-phase.

    摘要翻译： 本发明涉及一种用于沸水反应器的控制棒。 控制杆包括顶部件和底部件，其间布置吸收器部件。 吸收器部分包括从中心部分（4）延伸的中心部分（4）和四个吸收叶片（3）。 吸收器部分包括通道（10），该通道（10）包括中心部分并且沿着整个吸收体部分的长度延伸。 通道被具有长寿命的中子吸收材料的壁所包围，例如铪。 通道至少部分地装有调节剂，例如淡水。 在制造过程中，吸收体部分已进行热处理，使得铪合金已从α相完全或部分转变成β相，之后迅速冷却成α相。