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首页> 外文会议>Annual Meeting on Nuclear Technology; 20030520-20030522; Berlin; DE >DETERMINATION OF THE MTC BY NOISE ANALYSIS METHODS
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DETERMINATION OF THE MTC BY NOISE ANALYSIS METHODS

机译：噪声分析法测定MTC

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Determination of the moderator temperature coefficient (MTC) in Pressurized Water Reactors (PWRs) has been the matter of interest for a long time. The MTC should be within certain limits at all times; it should be negative, but its absolute value should not exceed a certain limit either. Since the MTC changes continuously during the fuel cycle with burnup and the corresponding change in the boron concentration in the water, a monitoring of its value is necessary. The traditional methods that are used to measure the MTC are time consuming and expensive (see Ref. 1). The noise based methods are more flexible but so far they were rather inaccurate with a systematic underestimation of the MTC (see Ref. 1 for a complete list of references in this matter). In recent work we have pointed out that the main weakness of the noise based method is the poor knowledge of the driving source, by measuring the temperature fluctuations only in one radial point whereas those fluctuations are highly space-dependent (see Ref. 1).
机译：压水堆（PWR）中慢化剂温度系数（MTC）的确定一直是人们关注的问题。 MTC始终应在一定范围内；它应该是负数，但其绝对值也不应该超过某个限制。由于MTC在燃油循环中随着燃尽而不断变化，并且水中的硼浓度也相应变化，因此有必要对其值进行监控。用于测量MTC的传统方法既耗时又昂贵（请参见参考资料1）。基于噪声的方法更加灵活，但是到目前为止，它们对MTC的系统低估还是不准确的（有关此问题的完整参考文献，请参见参考文献1）。在最近的工作中，我们已经指出，基于噪声的方法的主要缺点是，仅通过测量一个径向点的温度波动而对驱动源的了解不足，而这些波动高度依赖于空间（参见参考文献1）。

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