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[en] In the AER materials a great attention is given to the necessity of accounting for spatial effects of neutron flux redistribution in the WWER scram drop measurements. It has been emphasized that the said spatial effects manifest themselves the stronger the higher is the absolute value of negative reactivity inserted into the rector. It was proposed to determine the time dependence of the ratio of neutron density in the ion chamber's location to the neutron flux averaged over the reactor using the dynamic BIPR-8 KN or NOSTRA-type code. At the same time it is known that in the insertion of a high negative reactivity (scram drop) the above ratio of neutron fluxes will remain unchanged during the whole measurement period. This fact makes it possible to use steady-state BIPR-type codes for this ratio (Authors)
Source
Vidovszky, I. (ed.); VUJE, Inc., 918 64 Trnava (Slovakia); KFKI Atomic Energy Research Institute, Reactor Analysis Laboratory, H-1525 Budapest 114, POB 49 (Hungary); NPP Dukovany, 675 50 Dukovany (Czech Republic); Institute State Scientific and Technical Center for Nuclear and Radiation Safety, 35-37 Radgospna street, 03142 Kyiv-142 (Ukraine); Kozloduy NPP plc, Kozloduy 3321 (Bulgaria); Jaslovske Bohunice NPP (Slovakia); Nuclear Research Institute Rez plc, CZ-250 68 Husinec-Rez, cp.130 (Czech Republic); ALTA Dukovany, NPP Dukovany, 675 50 Dukovany (Czech Republic); Budapest University of Technology and Economics, Institute of Nuclear Techniques, Budapest XI, Mueegyetem rkp. 9, 1111 (Hungary); International Atomic Energy Agency (IAEA), Wagramerstrasse 5, P.O.Box 100, A-1400 Vienna (Austria); 783 p; ISBN 963-372-632 8; 
; Nov 2005; p. 311-317; 15. Atomic Energy Research Symposium on WWER Reactor Physics and Reactor Safety; Znojmo (Czech Republic); 3-7 Oct 2005; Also available from VUJE, Inc., Okruzna 5, 918 64 Trnava (SK); 4 figs., 1 tab., 4 refs.
; Nov 2005; p. 311-317; 15. Atomic Energy Research Symposium on WWER Reactor Physics and Reactor Safety; Znojmo (Czech Republic); 3-7 Oct 2005; Also available from VUJE, Inc., Okruzna 5, 918 64 Trnava (SK); 4 figs., 1 tab., 4 refs.