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[en] Based on the method of neutron flux expansion by proper orthogonal functions for a homogenous stationary task, conditions of the WWER-1000 stability in radial-azimuthal and axial xenon power fluctuations have been studied in this work. It is shown that even under the great negative power reactivity coefficient, the increase in neutron flux at the end of the fuel cycle destabilizes the WWER-1000 core in xenon transients, und the reactor can be stabilized and xenon fluctuations can be suppressed only by the control rods movement. Results of WWER-1000 stability analytical assessment based upon the methods of mathematical physics absolutely comply with results of the straightforward numerical simulation of xenon transients with the three-dimensional dynamic computer code DYN3D (Authors)
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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); RRC 'Kurchatov Institute', Institute of Nuclear Reactors, VVER Department, 123182 Moscow (Russian Federation); Paks NPP Ltd., 7031 Paks (Hungary); Skoda JS a.s., Orlik 266, 316 06 Plzen (Czech Republic); INRNE - 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); [833 p.]; ISBN 963-372-630-1; 
; Nov 2003; p. 167-180; 13. Atomic Energy Research Symposium on WWER Physics and Reactor Safety; Dresden (Germany); 22-26 Sep 2003; Also available from VUJE Trnava a.s. - Engineering, Design and Research Organization, Okruzna 5, 918 64 Trnava (Slovak Republic); 2 refs., 9 figs.
; Nov 2003; p. 167-180; 13. Atomic Energy Research Symposium on WWER Physics and Reactor Safety; Dresden (Germany); 22-26 Sep 2003; Also available from VUJE Trnava a.s. - Engineering, Design and Research Organization, Okruzna 5, 918 64 Trnava (Slovak Republic); 2 refs., 9 figs.