DEVELOPMENT OF METHODICAL APPROACHES IN VVER CALCULATIONS
24th Symposium of AER on VVER Reactor Physics and Reactor Safety (2014, Sochi, Russia)
Advances in spectral and core calculation methods
Abstract
DEVELOPMENT OF METHODICAL APPROACHES IN VVER CALCULATIONS
Bolobov P.A., Lazarenko A.P., Tomilov M.Ju. NRC “Kurchatov Institute”, Moscow, Russia
ABSTRACT
The report provides a brief description of the current state of the KASKAD software package intended for VVERs neutronic calculations. The issues related to various sources of calculation error are considered including:
– the spectral code errors;
– uncertainties associated with some features of the calculation model used in the preparation of few-group constants (for instance, the use of constant values of the state parameters when calculating the FA depletion);
– errors of few-group constant approximation scheme;
– the coarse-mesh calculation uncertainties (for instance, neglecting the effect of 10B depletion in the soluble boron during the fuel loading operation).
The report gives a special attention to various aspects of improving methodological approaches used in calculations.