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错装料诊断是反应堆初装料后必须完成的项目．根据谐波综合法原理，可用高阶谐波的线性组合来表示堆芯的通量分布．本文以谐波综合法得出的谐波系数作为通量分布特征的模式，与预先设定的各种有代表性的（包括故障）工况相比较，再根据模式识别原理，识别出实际堆芯最可能归属的模式，从而诊断出故障的类型．此诊断方法具有结果含义明确、结论合理、抗随机误差、计算简便等优点，可方便、有效地诊断探头失效、错装料等故障工况．
The wrong charge diagnosis is the item that must be completed after the initial charge of the reactor. According to the principle of harmonic synthesis, a linear combination of higher order harmonics can be used to represent the flux distribution of the core. In this paper, the harmonic coefficient obtained by the harmonic synthesis method is used as the pattern of the flux distribution characteristics, and compared with the pre-set various representative (including fault) conditions, and then according to the pattern recognition principle, the actual reactor The most likely mode of assignment of cores is to diagnose the type of failure. The diagnosis method has the advantages of clear result, reasonable conclusion, anti-random error, simple calculation and the like, and can conveniently and effectively diagnose fault conditions such as failure of the probe, wrong loading of materials, and the like.