USAGE OF BURNT FUEL ISOTOPIC COMPOSITIONS, OBTAINED BY ENGINEERING CODES, IN MONTE-CARLO CODE CALCULATIONS
24th Symposium of AER on VVER Reactor Physics and Reactor Safety (2014, Sochi, Russia)
Reactor physics calculations, experiments and code validation
Abstract
USAGE OF BURNT FUEL ISOTOPIC COMPOSITIONS, OBTAINED BY ENGINEERING CODES, IN MONTE-CARLO CODE CALCULATIONS
Aleshin S.S., Gorodkov S.S., Shcherenko A.I. NRC “Kurchatov institute”, Moscow, Russia
ABSTRACT
A burn-up calculation of large systems by Monte-Carlo code (MCU) is complex process and requires large computational costs. This fact makes Monte-Carlo codes usage complicated for project and operating calculations.
Previously prepared isotopic compositions are proposed to use for the Monte-Carlo code calculations of different system states with burnt fuel. Isotopic compositions are proposed to calculate by an approximation method. The approximation method is based on usage of a spectral functionality and reference isotopic compositions, that are calculated by engineering codes (TVS-M, PERMAK-A).
The multiplication factors and power distributions of FA are calculated in this work by the Monte-Carlo code MCU using earlier prepared isotopic compositions. The results of MCU calculations were compared with the results that were obtained by TVS-M code.