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[en] On the basic of methods developed recently for square-fuel-assembly reactor cores, discontinuity factors for hexagonal control absorbers (WWER-440) and reflector nodes have been derived. Partial currents from heterogeneous multi-group transport calculations are used for the determination of the discontinuity factors. As shown by suitable benchmark calculations, the application of these quantities in two-group nodal diffusion code DYN3D clearly improves the results of assembly powers and effective multiplication factors. The advantage of reflector diffusion parameters, including discontinuity factors, over conventional albedos has been demonstrated (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. 89-108; 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); 14 refs., 9 figs., 1 tab.
; Nov 2003; p. 89-108; 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); 14 refs., 9 figs., 1 tab.