ANALYSIS OF THE SCRAM ACTUATION BY PERIOD DURING WWER-1000 FAST UNLOADING

Y.Ovdiienko, AKuchin, V.Khalimonchuk, Ukraine, (SSTC N&RS)

18th Symposium of AER on VVER Reactor Physics and Reactor Safety (2008, Eger, Hungary)
Reactor Dynamics, Safety Analysis

Abstract

Processes that cause the scram actuation by period during WWER-1000 fast unloading in condition of application of new monitoring system AKNP-I are analyzed. Results of calculation investigation of reactor fast unloading, that have been occurred on Ukrainian NPP, and comparisons of results of modeling with experimental data are presented. Influence of such factors as dropping time of control rods, time moment of campaign, discretization step of period determination on the reactor fast unloading behavior are investigated.

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