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    System for detection of defective nuclear fuel rod
    1.
    发明公开
    System for detection of defective nuclear fuel rod 失效
    系统zur Erkennung von schadhaftenKernbrennstäben。

    公开(公告)号：EP0677853A1

    公开(公告)日：1995-10-18

    申请号：EP95302387.6

    申请日：1995-04-11

    申请人： GENERAL ELECTRIC COMPANY

    发明人： Pao, Hsueh-Wen ,  Snyder, Dane Thomas ,  Faulstich, David Louis ,  Ma, Johnny Tung-Chiu ,  Izzo, Kenneth Roy ,  Swanson, Joel Clyde ,  Laurent, Martin Sullivan ,  Kachel, Peter Frederick

    IPC分类号： G21C17/07

    CPC分类号： G21C17/07 ,  G21Y2002/202 ,  G21Y2004/30 ,  G21Y2004/40

    摘要： A process and a system for detecting defective nuclear fuel assemblies in situ. The system includes two basic subsystems. The first subsystem is a sample collection system consisting of a hood (2) placed over the fuel. A technique whereby a vacuum is drawn across a submerged nozzle of a degas tank (14) is used to draw up the sample of fluid out of a fuel assembly (4). The second subsystem determines the amount of Kr-85 radio-isotope contained in the fluid sample. This information is used to determine whether the fuel assembly contains a defective, i.e., leaking, fuel rod. The measurement values for Kr-85 in the fluid sample extracted from the fuel assembly are compared to the measurement values for Kr-85 in fluid samples taken from the reactor pool prior to fuel assembly testing and fluid samples taken from non-leaking control cells, the latter values representing the background to which the subject fuel assembly is compared. Based on this comparison, a determination is made concerning whether the subject fuel assembly is defective.

    摘要翻译： 一种现场检测有缺陷的核燃料组件的过程和系统。 该系统包括两个基本子系统。 第一个子系统是由放置在燃料上的罩（2）组成的采样系统。 使用通过脱气罐（14）的浸没喷嘴抽取真空的技术来将流体样品从燃料组件（4）中拉出。 第二个子系统确定流体样品中所含的Kr-85放射性同位素的量。 该信息用于确定燃料组件是否包含有缺陷的，即泄漏的燃料棒。 将从燃料组件提取的流体样品中的Kr-85的测量值与在燃料组装测试之前从反应池中获取的流体样品中的Kr-85的测量值和从非泄漏的控制电池获取的流体样品进行比较， 后一个值表示对象燃料组件与之比较的背景。 基于该比较，确定主体燃料组件是否有缺陷。