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采用经典微扰理论,高效地得到问题相关的多群截面的扰动对特征值的直接影响,即显式敏感性。应用广义微扰理论,推导了在子群共振自屏方法中,多群共振自屏截面对非共振核素截面的灵敏度系数的计算方法。结合前两项内容,得到非共振核素通过共振自屏过程对特征值的间接影响,即隐式敏感性。根据与显式灵敏度系数的比较,分析了隐式敏感性相对于显式敏感性的重要性。
By using the classical perturbation theory, the direct influence of the disturbances of multiple groups of cross sections pertinent to the problem on the eigenvalues is efficiently obtained, namely the explicit sensitivity. The generalized perturbation theory is used to derive the method of calculating the sensitivity coefficient of multi-group resonance self-screen cross-section to non-resonant cross-section in sub-group self-resonance method. Combining with the first two items, the indirect effect of non-resonant nuclei on the eigenvalue through the process of resonance self-screen is obtained, namely the implicit sensitivity. Based on the comparison with the explicit sensitivity coefficient, the importance of implicit sensitivity to explicit sensitivity is analyzed.