Monte Carlo few group constants generation for CANDU reactor core analysis

In the two-step CANDU core analysis, the lattice physics code WIMS-IST is used for generation of the few-group diffusion theory constants (hereafter, few-group constants), and the neutronics design parameters such as the effective multiplication factor (keff), the power distribution, reactivity coefficients, etc. of the reactor core are calculated by the diffusion theory code RFSP-IST. In addition, three dimensional (3-D) supercell calculations are conducted to take into account the effect of the reactivity devices perpendicular to the horizontal fuel channels by DRAGON-IST. Recently, the Monte Carlo (MC) few-group constant generation method has been successfully applied for the two-step reactor core analysis. In this paper, the CANDU reactor core analysis is performed with the two-group constants generated by the Seoul National University MC code, McCARD