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[en] This presentation at example of emergency mode related to rejection of cluster studies how safety of RF with WWER-1000 is influenced by time of CPS control rod increased as compared to the designed one, and what is the effect of incomplete insertion of some clusters into core by signals from emergency protection (AZ). Modeling was performed with the use of spatial kinetics computer code DYN3D [2] using nodal method to calculate distribution of neutron flux in core, which advantages were addressed in [3]. This mode was modeled in the beginning, and end of the reactor campaign at the rated level of power with consideration of complete scale core. It was assumed that emergency protection signal by which CPS control rods are to be dropped is produced due to decreasing period of reactor below 10 s. Influence of different time of control rods dipping (there were considered dipping time 2, 4, 6 sec) and partial non insertion of some control rods (there were considered sticking of 1, 3 and 5 control rods at 1/3H from core top) were studied (Authors)
Source
Vidovszky, Istvan (Kiadja and KFKI Atomenergia Kutatointezet, H-1525 Budapest 114, POB 49 (Hungary)); VUJE Trnava, Inc. - Engineering, Design and Research Organization, 918 64 Trnava (Slovakia); KFKI Atomic Energy Research Institute, H-1525 Budapest 114, POB 49 (Hungary); RRC 'Kurchatov Institute', Institute of Nuclear Reactors, VVER Department, 123182 Moscow (Russian Federation); Paks NPP Ltd., 7031 Paks (Hungary); SKODA JS a.s., 316 06 Plzen (Czech Republic); Institute for Nuclear Research and Nuclear Energy, Bulgarian Academy of Sciences, Tzarigradsko Shaussee 72, Sophia 1784, (Bulgaria); UJV Rez plc, 250 68 Rez (Czech Republic); 558 p; ISBN 963-372-627-1; 
; Nov 2002; p. 13-25; 12. Atomic Energy Research Symposium on WWER Physics and Reactor Safety; Sunny Beach (Bulgaria); 22-28 Sep 2002; Also available from VUJE Trnava a.s. - Engineering, Design and Research Organization, Okruzna 5, 918 64 Trnava (Slovak Republic); 3 refs., 9 figs., 1 tab.
; Nov 2002; p. 13-25; 12. Atomic Energy Research Symposium on WWER Physics and Reactor Safety; Sunny Beach (Bulgaria); 22-28 Sep 2002; Also available from VUJE Trnava a.s. - Engineering, Design and Research Organization, Okruzna 5, 918 64 Trnava (Slovak Republic); 3 refs., 9 figs., 1 tab.