Differential reactivity coefficients estimation method for VVER reactor by KORSAR/GP and TRAP‐KS codes application
26th Symposium of AER on VVER Reactor Physics and Reactor Safety (2016, Helsinki, Finland)
Reactor dynamics and safety analysis
Abstract
DIFFERENTIAL REACTIVITY COEFFICIENTS ESTIMATION METHOD FOR VVER REACTOR BY KORSAR/GP AND TRAP-KS CODES APPLICATIONM.A. Uvakin, A.P. Demekhin, G.V. Alekhin, V.V. Bryukhin, A.N. Ustinov JSC OKB GidropressABSTRACTThis work is oriented to actual problem resolving. The problem is VVER reactor facility stationary conditions preparing for coupling physical and thermo-hydraulic dynamical processes calculation. Work contains fuel temperature and coolant density reactivity coefficients estimation approach. It is based on finite-difference approximation. Developed model is built on macroscopic library structure and feedback parameterization principles. Method is suitable for KORSAR/GP and TRAP-KS codes which are used physical data preparing by SAPFIR_95 code. Material contains some application results of introduced method for stationary conditions and for transients with power shifting.26th Symposium of AER on VVER Reactor Physics and Reactor Safety 46 10 – 14 October 2016, Helsinki, Finland