Optimiz the Neutronic Parameters for VVER-1200 Reactor Core Using WIMS

The purpose of this study is the optimization of neutronic characteristics of the VVER-1200 reactor core. Calculations and simulations in this study, were performed using the nuclear reactor lattice cell calculation code, WIMS-ANL and its 69-library package for investigating temperature and power effect on the VVE-1200 reactor core reactivity for different enriched uranium in two media.The results of this work are means of optimizing the reactivity coefficient and ideally ways of reducing the insertion of negative reactivity of VVER-1200 reactor core in the absence of control rods and burnable poisons