POSSIBLE VISIBLE POWER FIELD TILTS IN BIG REACTOR CAUSED BY SMALL DEVIATIONS OF BREEDING CAPABILITIES OF FUEL ASSEMBLIES

E.Mikailov, A.Sumarokova, L.Shishkov, National Research Centre “Kurchatov Institute”, Moscow, Russia

22nd Symposium of AER on VVER Reactor Physics and Reactor Safety (2012, Průhonice, Czech Republic)
CORE DESIGN, OPERATION AND FUEL MANAGEMENT

Abstract

The paper discusses a probable significant global power field tilt caused by a random small
change in multiplying characteristics of fuel assemblies in a physically large reactor. The
paper proves that with random difference of multiplying characteristics in VVER-440 and
VVER-1000 cores, the power field tilt is higher in VVER-1000. The reaching of normal
power noticeably decreases the power field tilt, at that.

Presentation / full paper