Comparison of neutron transport calculation methods based on C5G7-MOX and preliminary analysis of sensitivity of MOC parameters

[Background]: Method of Characteristics (MOC) is widely used in high-fidelity numerical simulation because of its powerful geometric processing ability and its ability to take into account calculation cost and accuracy. In addition to MOC, the common transport calculation methods also include Collision Probability Method (CP) and Interface Current Method (IC). [Purpose]: In this paper, the comparative analysis of MOC, CP and IC from method theory and numerical calculation is particularly important for evaluating their ability in pin-by-pin calculation. At the same time, in MOC calculation, different parameter selection will affect the calculation cost and calculation accuracy, so it is necessary to carry out sensitivity analysis to find the best parameter. [Methods]: In this paper, the three calculation methods are compared from the principle, and then the numerical calculation and the preliminary analysis of the sensitivity of MOC parameters are completed based on the 2D C5G7-MOX reference problem. [Results]