caa a22 4500 475829077 CHVBK 20180406123836.0 cr unu---uuuuu 170329e20000601xx s 000 0 eng 10.1007/BF02673467 doi (NATIONALLICENCE)springer-10.1007/BF02673467 Postnikov N. aut Conditions for the existence of chaotic oscillations in nuclear reactors [Elektronische Daten] [N. Postnikov] It is shown on the basis of point kinetics equations with delayed neutrons that if the impulse feedback function is negative, nonmonotonic, and possesses several maxima and the coefficient of amplification of feedback is sufficiently large, then chaotic self-excited oscillations of the following type arise in nuclear reactors. Neutron bursts with random intensity occur in random time interals in the reactor, and the neutron density between the bursts oscillates at a low level. The mechanism for the appearance of chaos is described and one-dimensional mappings which approximately determine the chaotic dynamics are constructed. Three types of reactors (boiling water, with gaseous core, pulsed) where such chaotic oscillations can arise are indicated. The results obtained point the way to determining other types of reactors with stochastic behavior. 4 figures, 10 references. Kluwer Academic/Plenum Publishers, 2000 Atomic Energy Kluwer Academic Publishers-Plenum Publishers 88/6(2000-06-01), 449-455 1063-4258 88:6<449 2000 88 10512 https://doi.org/10.1007/BF02673467 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF02673467 text/html Onlinezugriff via DOI NATIONALLICENCE 100 1- Postnikov N. aut NATIONALLICENCE 773 0- Atomic Energy Kluwer Academic Publishers-Plenum Publishers 88/6(2000-06-01), 449-455 1063-4258 88:6<449 2000 88 10512 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer