FIELD: power industry.
SUBSTANCE: active zone includes a fission initiator that includes fissionable and fertile materials, which provides initiation of a running wave and setting value keff that is equal at least to 1. Active zone is made so that it is possible to remove the fission initiator. Active zone can be made so that concentration of nuclear material in the space can be changed.
EFFECT: possible spreading of running wave in the volume of active zone.
26 cl, 39 dwg
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