A New Precursor Integral Method for Solving Space-Dependent Kinetic Equations in Neutronic and Thermal-Hydraulic Coupling System

Table 4

TWIGL relative power transient reference problem step reactivity insertion at 50 ms.

	Independent variables	Zero-order Taylor expansion	First-order Taylor expansion	Exponential expansion
0.1	2.044782	2.044766 (−7.82e − 4)	2.044775 (−3.42e − 4)	2.044777 (−2.44e − 4)
1	2.042971	2.042809 (−9.64e − 4)	2.042890 (−9.25e − 2)	2.042896 (−9.22e − 2)
10	2.018193	2.016678 (−1.37e0)	2.017436 (−1.34e0)	2.017459 (−1.33e0)
50	1.875968	1.870072 (−8.54e0)	1.872973 (−8.41e0)	1.873018 (−8.40e0)