FIELD: nuclear engineering.
SUBSTANCE: invention relates to devices, methods for production thereof and methods for controlling reactivity in nuclear fission reactor. Device for passive control of reactivity includes temperature-dependent leading material and material which changes neutron absorption parameter, differing from leading material. Part of material which changes neutron absorption parameter, is in physical contact with part of leading material. Material which changes neutron absorption parameter can be moved by means of leading material into selected part of core.
EFFECT: high efficiency of controlling reactor reactivity.
43 cl, 18 dwg
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