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    • 5. 发明申请
    • BURN-UP PROFILE MEASURING METHOD, BURN-UP PROFILE MEASURING APPARATUS, RADIATION SIGNAL DISTRIBUTION MEASURING APPARATUS, AND BURN-UP PROFILE MEASURING PROGRAM
    • 燃烧轮廓测量方法,燃烧轮廓测量装置,辐射信号分布测量装置和燃烧轮廓测量程序
    • US20100065750A1
    • 2010-03-18
    • US12595546
    • 2008-04-11
    • Hironori KumanomidoNaotaka OdaYutaka TokiwaMakoto Ueda
    • Hironori KumanomidoNaotaka OdaYutaka TokiwaMakoto Ueda
    • G01T3/00G01T1/185
    • G21C17/063G21Y2002/201G21Y2002/204G21Y2004/30G21Y2004/40
    • An upper detector and a lower detector that face at least one side of a fuel assembly, on which neutrons are irradiated in a nuclear reactor, and detect radiation are set at a predetermined interval in an axial direction of the fuel assembly. Distributions of radiation signals are measured by the upper detector and the lower detector while the fuel assembly and the upper detector and the lower detectors are relatively moved along the axial direction of the fuel assembly. Soundness of radiation signals measured by the upper detector and the lower detector is determined in every measurement by comparing radiation signal distributions obtained by measuring the same portion in the axial direction of the fuel assembly in a multiplexed manner with the upper detector and the lower detector. Thereafter, relative burn-up is calculated by utilizing the measured radiation signals to measure a burn-up profile. According to the present invention, it is possible to measure a burn-up profile of the fuel assembly while securing reliability of a measurement result.
    • 面向燃料组件的至少一侧的上检测器和下检测器,其中在核反应堆中辐射中子并检测辐射,沿燃料组件的轴向方向被设定为预定的间隔。 辐射信号的分布由上检测器和下检测器测量,而燃料组件和上检测器和下检测器沿着燃料组件的轴向方向相对移动。 通过比较通过以多路复用方式与上部检测器和下部检测器测量燃料组件的轴向方向上的相同部分而获得的辐射信号分布,在每次测量中确定由上部检测器和下部检测器测量的辐射信号的良好性。 此后,通过利用测量的辐射信号来计算相对燃耗以测量燃尽曲线。 根据本发明,可以在确保测量结果的可靠性的同时测量燃料组件的燃尽曲线。