Modeling of power distributions in WWER core for safety analysis

Possibilities for the methodical approach and MEX program for calculations in the context of current reason of safety are analyzed. The current reason of safety is based on deterministic and probabilistic approaches. The presented approach provides a way of correct formulating initial conditions for calculations by means of both methods. Positive aspects of the approach and MEX program are noted. The validity of choice of the initial conditions in deterministic and probabilistic analyses is demonstrated by the obtained results, they reveal the possibility of optimization in profiling of fuel enrichment in fuel assemblies and lowering cost of the atomic energy